diff --git a/lib/node_modules/@stdlib/stats/base/dists/wald/kurtosis/README.md b/lib/node_modules/@stdlib/stats/base/dists/wald/kurtosis/README.md
new file mode 100644
index 000000000000..390d9d2bf89e
--- /dev/null
+++ b/lib/node_modules/@stdlib/stats/base/dists/wald/kurtosis/README.md
@@ -0,0 +1,254 @@
+
+
+# Kurtosis
+
+> [Wald][wald-distribution] distribution [excess kurtosis][kurtosis].
+
+
+
+
+
+The [excess kurtosis][kurtosis] for a [Wald][wald-distribution] random variable with mean `μ` and shape parameter `λ > 0` is
+
+
+
+```math
+\mathop{\mathrm{Kurt}}\left( X \right) = \frac{15\mu}{\lambda}
+```
+
+
+
+
+
+
+
+
+
+
+
+
+
+## Usage
+
+```javascript
+var kurtosis = require( '@stdlib/stats/base/dists/wald/kurtosis' );
+```
+
+#### kurtosis( mu, lambda )
+
+Returns the [excess kurtosis][kurtosis] for a [Wald][wald-distribution] distribution with parameters `mu` (mean) and `lambda` (shape parameter).
+
+```javascript
+var y = kurtosis( 2.0, 1.0 );
+// returns 30.0
+
+y = kurtosis( 0.0, 1.0 );
+// returns NaN
+
+y = kurtosis( -1.0, 4.0 );
+// returns NaN
+```
+
+If provided `NaN` as any argument, the function returns `NaN`.
+
+```javascript
+var y = kurtosis( NaN, 1.0 );
+// returns NaN
+
+y = kurtosis( 0.0, NaN );
+// returns NaN
+```
+
+If provided `mu <= 0` or `lambda <= 0`, the function returns `NaN`.
+
+```javascript
+var y = kurtosis( 0.0, 0.0 );
+// returns NaN
+
+y = kurtosis( 0.0, -1.0 );
+// returns NaN
+
+y = kurtosis( -1.0, 0.0 );
+// returns NaN
+```
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+## Examples
+
+
+
+```javascript
+var uniform = require( '@stdlib/random/array/uniform' );
+var logEachMap = require( '@stdlib/console/log-each-map' );
+var EPS = require( '@stdlib/constants/float64/eps' );
+var kurtosis = require( '@stdlib/stats/base/dists/wald/kurtosis' );
+
+var opts = {
+ 'dtype': 'float64'
+};
+var mu = uniform( 10, EPS, 10.0, opts );
+var lambda = uniform( 10, EPS, 20.0, opts );
+
+logEachMap( 'µ: %0.4f, λ: %0.4f, Kurtosis(X;µ,λ): %0.4f', mu, lambda, kurtosis );
+```
+
+
+
+
+
+
+
+* * *
+
+
+
+## C APIs
+
+
+
+
+
+
+
+
+
+
+
+### Usage
+
+```c
+#include "stdlib/stats/base/dists/wald/kurtosis.h"
+```
+
+#### stdlib_base_dists_wald_kurtosis( mu, lambda )
+
+Returns the [excess kurtosis][kurtosis] for a [Wald][wald-distribution] distribution with mean `mu` and shape parameter `lambda`.
+
+```c
+double out = stdlib_base_dists_wald_kurtosis( 2.0, 1.0 );
+// returns 30.0
+```
+
+The function accepts the following arguments:
+
+- **mu**: `[in] double` mean.
+- **lambda**: `[in] double` shape parameter.
+
+```c
+double stdlib_base_dists_wald_kurtosis( const double mu, const double lambda );
+```
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+### Examples
+
+```c
+#include "stdlib/stats/base/dists/wald/kurtosis.h"
+#include
+#include
+
+static double random_uniform( const double min, const double max ) {
+ double v = (double)rand() / ( (double)RAND_MAX + 1.0 );
+ return min + ( v*(max-min) );
+}
+
+int main( void ) {
+ double lambda;
+ double mu;
+ double y;
+ int i;
+
+ for ( i = 0; i < 10; i++ ) {
+ mu = random_uniform( 0.1, 5.0 );
+ lambda = random_uniform( 0.1, 20.0 );
+ y = stdlib_base_dists_wald_kurtosis( mu, lambda );
+ printf( "µ: %.4f, λ: %.4f, Kurtosis(X;µ,λ): %.4f\n", mu, lambda, y );
+ }
+}
+```
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+[wald-distribution]: https://en.wikipedia.org/wiki/Inverse_Gaussian_distribution
+
+[kurtosis]: https://en.wikipedia.org/wiki/Kurtosis
+
+
+
+
diff --git a/lib/node_modules/@stdlib/stats/base/dists/wald/kurtosis/benchmark/benchmark.js b/lib/node_modules/@stdlib/stats/base/dists/wald/kurtosis/benchmark/benchmark.js
new file mode 100644
index 000000000000..58f3d82b77bb
--- /dev/null
+++ b/lib/node_modules/@stdlib/stats/base/dists/wald/kurtosis/benchmark/benchmark.js
@@ -0,0 +1,59 @@
+/**
+* @license Apache-2.0
+*
+* Copyright (c) 2026 The Stdlib Authors.
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+* http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*/
+
+'use strict';
+
+// MODULES //
+
+var bench = require( '@stdlib/bench' );
+var uniform = require( '@stdlib/random/array/uniform' );
+var isnan = require( '@stdlib/math/base/assert/is-nan' );
+var EPS = require( '@stdlib/constants/float64/eps' );
+var pkg = require( './../package.json' ).name;
+var kurtosis = require( './../lib' );
+
+
+// MAIN //
+
+bench( pkg, function benchmark( b ) {
+ var lambda;
+ var opts;
+ var mu;
+ var y;
+ var i;
+
+ opts = {
+ 'dtype': 'float64'
+ };
+ mu = uniform( 100, EPS, 100.0, opts );
+ lambda = uniform( 100, EPS, 20.0, opts );
+
+ b.tic();
+ for ( i = 0; i < b.iterations; i++ ) {
+ y = kurtosis( mu[ i % mu.length ], lambda[ i % lambda.length ] );
+ if ( isnan( y ) ) {
+ b.fail( 'should not return NaN' );
+ }
+ }
+ b.toc();
+ if ( isnan( y ) ) {
+ b.fail( 'should not return NaN' );
+ }
+ b.pass( 'benchmark finished' );
+ b.end();
+});
diff --git a/lib/node_modules/@stdlib/stats/base/dists/wald/kurtosis/benchmark/benchmark.native.js b/lib/node_modules/@stdlib/stats/base/dists/wald/kurtosis/benchmark/benchmark.native.js
new file mode 100644
index 000000000000..c8d4383d125e
--- /dev/null
+++ b/lib/node_modules/@stdlib/stats/base/dists/wald/kurtosis/benchmark/benchmark.native.js
@@ -0,0 +1,69 @@
+/**
+* @license Apache-2.0
+*
+* Copyright (c) 2026 The Stdlib Authors.
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+* http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*/
+
+'use strict';
+
+// MODULES //
+
+var resolve = require( 'path' ).resolve;
+var bench = require( '@stdlib/bench' );
+var uniform = require( '@stdlib/random/array/uniform' );
+var isnan = require( '@stdlib/math/base/assert/is-nan' );
+var tryRequire = require( '@stdlib/utils/try-require' );
+var format = require( '@stdlib/string/format' );
+var EPS = require( '@stdlib/constants/float64/eps' );
+var pkg = require( './../package.json' ).name;
+
+
+// VARIABLES //
+
+var kurtosis = tryRequire( resolve( __dirname, './../lib/native.js' ) );
+var opts = {
+ 'skip': ( kurtosis instanceof Error )
+};
+
+
+// MAIN //
+
+bench( format( '%s::native', pkg ), opts, function benchmark( b ) {
+ var arrayOpts;
+ var lambda;
+ var mu;
+ var y;
+ var i;
+
+ arrayOpts = {
+ 'dtype': 'float64'
+ };
+ mu = uniform( 100, EPS, 100.0, arrayOpts );
+ lambda = uniform( 100, EPS, 20.0, arrayOpts );
+
+ b.tic();
+ for ( i = 0; i < b.iterations; i++ ) {
+ y = kurtosis( mu[ i % mu.length ], lambda[ i % lambda.length ] );
+ if ( isnan( y ) ) {
+ b.fail( 'should not return NaN' );
+ }
+ }
+ b.toc();
+ if ( isnan( y ) ) {
+ b.fail( 'should not return NaN' );
+ }
+ b.pass( 'benchmark finished' );
+ b.end();
+});
diff --git a/lib/node_modules/@stdlib/stats/base/dists/wald/kurtosis/benchmark/c/Makefile b/lib/node_modules/@stdlib/stats/base/dists/wald/kurtosis/benchmark/c/Makefile
new file mode 100644
index 000000000000..979768abbcec
--- /dev/null
+++ b/lib/node_modules/@stdlib/stats/base/dists/wald/kurtosis/benchmark/c/Makefile
@@ -0,0 +1,146 @@
+#/
+# @license Apache-2.0
+#
+# Copyright (c) 2026 The Stdlib Authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#/
+
+# VARIABLES #
+
+ifndef VERBOSE
+ QUIET := @
+else
+ QUIET :=
+endif
+
+# Determine the OS ([1][1], [2][2]).
+#
+# [1]: https://en.wikipedia.org/wiki/Uname#Examples
+# [2]: http://stackoverflow.com/a/27776822/2225624
+OS ?= $(shell uname)
+ifneq (, $(findstring MINGW,$(OS)))
+ OS := WINNT
+else
+ifneq (, $(findstring MSYS,$(OS)))
+ OS := WINNT
+else
+ifneq (, $(findstring CYGWIN,$(OS)))
+ OS := WINNT
+else
+ifneq (, $(findstring Windows_NT,$(OS)))
+ OS := WINNT
+endif
+endif
+endif
+endif
+
+# Define the program used for compiling C source files:
+ifdef C_COMPILER
+ CC := $(C_COMPILER)
+else
+ CC := gcc
+endif
+
+# Define the command-line options when compiling C files:
+CFLAGS ?= \
+ -std=c99 \
+ -O3 \
+ -Wall \
+ -pedantic
+
+# Determine whether to generate position independent code ([1][1], [2][2]).
+#
+# [1]: https://gcc.gnu.org/onlinedocs/gcc/Code-Gen-Options.html#Code-Gen-Options
+# [2]: http://stackoverflow.com/questions/5311515/gcc-fpic-option
+ifeq ($(OS), WINNT)
+ fPIC ?=
+else
+ fPIC ?= -fPIC
+endif
+
+# List of includes (e.g., `-I /foo/bar -I /beep/boop/include`):
+INCLUDE ?=
+
+# List of source files:
+SOURCE_FILES ?=
+
+# List of libraries (e.g., `-lopenblas -lpthread`):
+LIBRARIES ?=
+
+# List of library paths (e.g., `-L /foo/bar -L /beep/boop`):
+LIBPATH ?=
+
+# List of C targets:
+c_targets := benchmark.out
+
+
+# RULES #
+
+#/
+# Compiles source files.
+#
+# @param {string} [C_COMPILER] - C compiler (e.g., `gcc`)
+# @param {string} [CFLAGS] - C compiler options
+# @param {(string|void)} [fPIC] - compiler flag determining whether to generate position independent code (e.g., `-fPIC`)
+# @param {string} [INCLUDE] - list of includes (e.g., `-I /foo/bar -I /beep/boop/include`)
+# @param {string} [SOURCE_FILES] - list of source files
+# @param {string} [LIBPATH] - list of library paths (e.g., `-L /foo/bar -L /beep/boop`)
+# @param {string} [LIBRARIES] - list of libraries (e.g., `-lopenblas -lpthread`)
+#
+# @example
+# make
+#
+# @example
+# make all
+#/
+all: $(c_targets)
+
+.PHONY: all
+
+#/
+# Compiles C source files.
+#
+# @private
+# @param {string} CC - C compiler (e.g., `gcc`)
+# @param {string} CFLAGS - C compiler options
+# @param {(string|void)} fPIC - compiler flag determining whether to generate position independent code (e.g., `-fPIC`)
+# @param {string} INCLUDE - list of includes (e.g., `-I /foo/bar`)
+# @param {string} SOURCE_FILES - list of source files
+# @param {string} LIBPATH - list of library paths (e.g., `-L /foo/bar`)
+# @param {string} LIBRARIES - list of libraries (e.g., `-lopenblas`)
+#/
+$(c_targets): %.out: %.c
+ $(QUIET) $(CC) $(CFLAGS) $(fPIC) $(INCLUDE) -o $@ $(SOURCE_FILES) $< $(LIBPATH) -lm $(LIBRARIES)
+
+#/
+# Runs compiled benchmarks.
+#
+# @example
+# make run
+#/
+run: $(c_targets)
+ $(QUIET) ./$<
+
+.PHONY: run
+
+#/
+# Removes generated files.
+#
+# @example
+# make clean
+#/
+clean:
+ $(QUIET) -rm -f *.o *.out
+
+.PHONY: clean
diff --git a/lib/node_modules/@stdlib/stats/base/dists/wald/kurtosis/benchmark/c/benchmark.c b/lib/node_modules/@stdlib/stats/base/dists/wald/kurtosis/benchmark/c/benchmark.c
new file mode 100644
index 000000000000..09c3acf920a8
--- /dev/null
+++ b/lib/node_modules/@stdlib/stats/base/dists/wald/kurtosis/benchmark/c/benchmark.c
@@ -0,0 +1,140 @@
+/**
+* @license Apache-2.0
+*
+* Copyright (c) 2026 The Stdlib Authors.
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+* http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*/
+
+#include "stdlib/stats/base/dists/wald/kurtosis.h"
+#include
+#include
+#include
+#include
+#include
+
+#define NAME "wald-kurtosis"
+#define ITERATIONS 1000000
+#define REPEATS 3
+
+/**
+* Prints the TAP version.
+*/
+static void print_version( void ) {
+ printf( "TAP version 13\n" );
+}
+
+/**
+* Prints the TAP summary.
+*
+* @param total total number of tests
+* @param passing total number of passing tests
+*/
+static void print_summary( int total, int passing ) {
+ printf( "#\n" );
+ printf( "1..%d\n", total ); // TAP plan
+ printf( "# total %d\n", total );
+ printf( "# pass %d\n", passing );
+ printf( "#\n" );
+ printf( "# ok\n" );
+}
+
+/**
+* Prints benchmarks results.
+*
+* @param elapsed elapsed time in seconds
+*/
+static void print_results( double elapsed ) {
+ double rate = (double)ITERATIONS / elapsed;
+ printf( " ---\n" );
+ printf( " iterations: %d\n", ITERATIONS );
+ printf( " elapsed: %0.9f\n", elapsed );
+ printf( " rate: %0.9f\n", rate );
+ printf( " ...\n" );
+}
+
+/**
+* Returns a clock time.
+*
+* @return clock time
+*/
+static double tic( void ) {
+ struct timeval now;
+ gettimeofday( &now, NULL );
+ return (double)now.tv_sec + (double)now.tv_usec/1.0e6;
+}
+
+/**
+* Generates a random number on the interval [min,max).
+*
+* @param min minimum value (inclusive)
+* @param max maximum value (exclusive)
+* @return random number
+*/
+static double random_uniform( const double min, const double max ) {
+ double v = (double)rand() / ( (double)RAND_MAX + 1.0 );
+ return min + ( v*(max-min) );
+}
+
+/**
+* Runs a benchmark.
+*
+* @return elapsed time in seconds
+*/
+static double benchmark( void ) {
+ double elapsed;
+ double lambda[ 100 ];
+ double mu[ 100 ];
+ double y;
+ double t;
+ int i;
+
+ for ( i = 0; i < 100; i++ ) {
+ mu[ i ] = random_uniform( 0.1, 10.0 );
+ lambda[ i ] = random_uniform( 0.1, 10.0 );
+ }
+
+ t = tic();
+ for ( i = 0; i < ITERATIONS; i++ ) {
+ y = stdlib_base_dists_wald_kurtosis( mu[ i%100 ], lambda[ i%100 ] );
+ if ( y != y ) {
+ printf( "should not return NaN\n" );
+ break;
+ }
+ }
+ elapsed = tic() - t;
+ if ( y != y ) {
+ printf( "should not return NaN\n" );
+ }
+ return elapsed;
+}
+
+/**
+* Main execution sequence.
+*/
+int main( void ) {
+ double elapsed;
+ int i;
+
+ // Use the current time to seed the random number generator:
+ srand( time( NULL ) );
+
+ print_version();
+ for ( i = 0; i < REPEATS; i++ ) {
+ printf( "# c::%s\n", NAME );
+ elapsed = benchmark();
+ print_results( elapsed );
+ printf( "ok %d benchmark finished\n", i+1 );
+ }
+ print_summary( REPEATS, REPEATS );
+}
diff --git a/lib/node_modules/@stdlib/stats/base/dists/wald/kurtosis/binding.gyp b/lib/node_modules/@stdlib/stats/base/dists/wald/kurtosis/binding.gyp
new file mode 100644
index 000000000000..f343843f5bd2
--- /dev/null
+++ b/lib/node_modules/@stdlib/stats/base/dists/wald/kurtosis/binding.gyp
@@ -0,0 +1,170 @@
+# @license Apache-2.0
+#
+# Copyright (c) 2026 The Stdlib Authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# A `.gyp` file for building a Node.js native add-on.
+#
+# [1]: https://gyp.gsrc.io/docs/InputFormatReference.md
+# [2]: https://gyp.gsrc.io/docs/UserDocumentation.md
+{
+ # List of files to include in this file:
+ 'includes': [
+ './include.gypi',
+ ],
+
+ # Define variables to be used throughout the configuration for all targets:
+ 'variables': {
+ # Target name should match the add-on export name:
+ 'addon_target_name%': 'addon',
+
+ # Set variables based on the host OS:
+ 'conditions': [
+ [
+ 'OS=="win"',
+ {
+ # Define the object file suffix:
+ 'obj': 'obj',
+ },
+ {
+ # Define the object file suffix:
+ 'obj': 'o',
+ }
+ ], # end condition (OS=="win")
+ ], # end conditions
+ }, # end variables
+
+ # Define compile targets:
+ 'targets': [
+
+ # Target to generate an add-on:
+ {
+ # The target name should match the add-on export name:
+ 'target_name': '<(addon_target_name)',
+
+ # Define dependencies:
+ 'dependencies': [],
+
+ # Define directories which contain relevant include headers:
+ 'include_dirs': [
+ # Local include directory:
+ '<@(include_dirs)',
+ ],
+
+ # List of source files:
+ 'sources': [
+ '<@(src_files)',
+ ],
+
+ # Settings for the add-on:
+ 'link_settings': {
+ # Define libraries:
+ 'libraries': [
+ '<@(libraries)',
+ ],
+
+ # Define library directories:
+ 'library_dirs': [
+ '<@(library_dirs)',
+ ],
+ },
+
+ # C flags:
+ 'cflags': [
+ # Enable commonly used warning options:
+ '-Wall',
+
+ # Set optimization level:
+ '-O3',
+ ],
+
+ # C specific flags:
+ 'cflags_c': [
+ # Specify the C standard to which a program is expected to conform:
+ '-std=c99',
+ ],
+
+ # C++ specific flags:
+ 'cflags_cpp': [
+ # Specify the C++ standard to which a program is expected to conform:
+ '-std=c++11',
+ ],
+
+ # Linker flags:
+ 'ldflags': [],
+
+ # Apply conditions based on the host OS:
+ 'conditions': [
+ [
+ 'OS=="mac"',
+ {
+ # Linker flags:
+ 'ldflags': [
+ '-undefined dynamic_lookup',
+ '-Wl,-no-pie',
+ '-Wl,-search_paths_first',
+ ],
+ },
+ ], # end condition (OS=="mac")
+ [
+ 'OS!="win"',
+ {
+ # C flags:
+ 'cflags': [
+ # Generate position-independent code (PIC):
+ '-fPIC',
+ ],
+ },
+ ], # end condition (OS!="win")
+ ], # end conditions
+ }, # end target
+
+ # Target to copy the add-on to a standard location:
+ {
+ 'target_name': 'copy_addon',
+
+ # Specify the target type:
+ 'type': 'none',
+
+ # Define dependencies:
+ 'dependencies': [
+ # Require that the add-on be built before moving to a standard location:
+ '<(addon_target_name)',
+ ],
+
+ # Define a list of actions:
+ 'actions': [
+ {
+ 'action_name': 'copy_addon',
+ 'message': 'Copying addon...',
+
+ # Explicitly list the inputs in the command-line invocation below:
+ 'inputs': [],
+
+ # Declare the expected outputs:
+ 'outputs': [
+ '<(addon_output_dir)/<(addon_target_name).node',
+ ],
+
+ # Define the command-line invocation:
+ 'action': [
+ 'cp',
+ '<(PRODUCT_DIR)/<(addon_target_name).node',
+ '<(addon_output_dir)/<(addon_target_name).node',
+ ],
+ },
+ ], # end actions
+ }, # end target
+ ], # end targets
+}
diff --git a/lib/node_modules/@stdlib/stats/base/dists/wald/kurtosis/docs/repl.txt b/lib/node_modules/@stdlib/stats/base/dists/wald/kurtosis/docs/repl.txt
new file mode 100644
index 000000000000..31c66237e289
--- /dev/null
+++ b/lib/node_modules/@stdlib/stats/base/dists/wald/kurtosis/docs/repl.txt
@@ -0,0 +1,40 @@
+
+{{alias}}( μ, λ )
+ Returns the excess kurtosis of a Wald distribution with mean `μ` and
+ shape parameter `λ`.
+
+ If provided `NaN` as any argument, the function returns `NaN`.
+
+ If provided `μ <= 0` or `λ <= 0`, the function returns `NaN`.
+
+ Parameters
+ ----------
+ μ: number
+ Mean parameter.
+
+ λ: number
+ Shape parameter.
+
+ Returns
+ -------
+ out: number
+ Excess kurtosis.
+
+ Examples
+ --------
+ > var y = {{alias}}( 4.0, 2.0 )
+ 30.0
+ > y = {{alias}}( 0.0, 1.0 )
+ NaN
+ > y = {{alias}}( 1.0, 0.0 )
+ NaN
+ > y = {{alias}}( NaN, 1.0 )
+ NaN
+ > y = {{alias}}( 0.0, NaN )
+ NaN
+ > y = {{alias}}( 0.0, 0.0 )
+ NaN
+
+ See Also
+ --------
+
diff --git a/lib/node_modules/@stdlib/stats/base/dists/wald/kurtosis/docs/types/index.d.ts b/lib/node_modules/@stdlib/stats/base/dists/wald/kurtosis/docs/types/index.d.ts
new file mode 100644
index 000000000000..e28eb9da5f6b
--- /dev/null
+++ b/lib/node_modules/@stdlib/stats/base/dists/wald/kurtosis/docs/types/index.d.ts
@@ -0,0 +1,61 @@
+/*
+* @license Apache-2.0
+*
+* Copyright (c) 2026 The Stdlib Authors.
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+* http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*/
+
+// TypeScript Version: 4.1
+
+/**
+* Returns the excess kurtosis for a Wald distribution with mean `mu` and shape parameter `lambda`.
+*
+* ## Notes
+*
+* - If provided `mu <= 0` or `lambda <= 0`, the function returns `NaN`.
+*
+* @param mu - mean
+* @param lambda - shape parameter
+* @returns excess kurtosis
+*
+* @example
+* var y = kurtosis( 5.0, 2.0 );
+* // returns 37.5
+*
+* @example
+* var y = kurtosis( 0.0, 1.0 );
+* // returns NaN
+*
+* @example
+* var y = kurtosis( 1.0, 0.0 );
+* // returns NaN
+*
+* @example
+* var y = kurtosis( NaN, 1.0 );
+* // returns NaN
+*
+* @example
+* var y = kurtosis( 0.0, NaN );
+* // returns NaN
+*
+* @example
+* var y = kurtosis( 0.0, 0.0 );
+* // returns NaN
+*/
+declare function kurtosis( mu: number, lambda: number ): number;
+
+
+// EXPORTS //
+
+export = kurtosis;
diff --git a/lib/node_modules/@stdlib/stats/base/dists/wald/kurtosis/docs/types/test.ts b/lib/node_modules/@stdlib/stats/base/dists/wald/kurtosis/docs/types/test.ts
new file mode 100644
index 000000000000..9dd93e5d142a
--- /dev/null
+++ b/lib/node_modules/@stdlib/stats/base/dists/wald/kurtosis/docs/types/test.ts
@@ -0,0 +1,56 @@
+/*
+* @license Apache-2.0
+*
+* Copyright (c) 2026 The Stdlib Authors.
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+* http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*/
+
+import kurtosis = require( './index' );
+
+
+// TESTS //
+
+// The function returns a number...
+{
+ kurtosis( 5, 2 ); // $ExpectType number
+}
+
+// The compiler throws an error if the function is provided values other than two numbers...
+{
+ kurtosis( true, 3 ); // $ExpectError
+ kurtosis( false, 2 ); // $ExpectError
+ kurtosis( '5', 1 ); // $ExpectError
+ kurtosis( [], 1 ); // $ExpectError
+ kurtosis( {}, 2 ); // $ExpectError
+ kurtosis( ( x: number ): number => x, 2 ); // $ExpectError
+
+ kurtosis( 9, true ); // $ExpectError
+ kurtosis( 9, false ); // $ExpectError
+ kurtosis( 5, '5' ); // $ExpectError
+ kurtosis( 8, [] ); // $ExpectError
+ kurtosis( 9, {} ); // $ExpectError
+ kurtosis( 8, ( x: number ): number => x ); // $ExpectError
+
+ kurtosis( [], true ); // $ExpectError
+ kurtosis( {}, false ); // $ExpectError
+ kurtosis( false, '5' ); // $ExpectError
+ kurtosis( {}, [] ); // $ExpectError
+ kurtosis( '5', ( x: number ): number => x ); // $ExpectError
+}
+
+// The compiler throws an error if the function is provided insufficient arguments...
+{
+ kurtosis(); // $ExpectError
+ kurtosis( 3 ); // $ExpectError
+}
diff --git a/lib/node_modules/@stdlib/stats/base/dists/wald/kurtosis/examples/c/Makefile b/lib/node_modules/@stdlib/stats/base/dists/wald/kurtosis/examples/c/Makefile
new file mode 100644
index 000000000000..c8f8e9a1517b
--- /dev/null
+++ b/lib/node_modules/@stdlib/stats/base/dists/wald/kurtosis/examples/c/Makefile
@@ -0,0 +1,146 @@
+#/
+# @license Apache-2.0
+#
+# Copyright (c) 2026 The Stdlib Authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#/
+
+# VARIABLES #
+
+ifndef VERBOSE
+ QUIET := @
+else
+ QUIET :=
+endif
+
+# Determine the OS ([1][1], [2][2]).
+#
+# [1]: https://en.wikipedia.org/wiki/Uname#Examples
+# [2]: http://stackoverflow.com/a/27776822/2225624
+OS ?= $(shell uname)
+ifneq (, $(findstring MINGW,$(OS)))
+ OS := WINNT
+else
+ifneq (, $(findstring MSYS,$(OS)))
+ OS := WINNT
+else
+ifneq (, $(findstring CYGWIN,$(OS)))
+ OS := WINNT
+else
+ifneq (, $(findstring Windows_NT,$(OS)))
+ OS := WINNT
+endif
+endif
+endif
+endif
+
+# Define the program used for compiling C source files:
+ifdef C_COMPILER
+ CC := $(C_COMPILER)
+else
+ CC := gcc
+endif
+
+# Define the command-line options when compiling C files:
+CFLAGS ?= \
+ -std=c99 \
+ -O3 \
+ -Wall \
+ -pedantic
+
+# Determine whether to generate position independent code ([1][1], [2][2]).
+#
+# [1]: https://gcc.gnu.org/onlinedocs/gcc/Code-Gen-Options.html#Code-Gen-Options
+# [2]: http://stackoverflow.com/questions/5311515/gcc-fpic-option
+ifeq ($(OS), WINNT)
+ fPIC ?=
+else
+ fPIC ?= -fPIC
+endif
+
+# List of includes (e.g., `-I /foo/bar -I /beep/boop/include`):
+INCLUDE ?=
+
+# List of source files:
+SOURCE_FILES ?=
+
+# List of libraries (e.g., `-lopenblas -lpthread`):
+LIBRARIES ?=
+
+# List of library paths (e.g., `-L /foo/bar -L /beep/boop`):
+LIBPATH ?=
+
+# List of C targets:
+c_targets := example.out
+
+
+# RULES #
+
+#/
+# Compiles source files.
+#
+# @param {string} [C_COMPILER] - C compiler (e.g., `gcc`)
+# @param {string} [CFLAGS] - C compiler options
+# @param {(string|void)} [fPIC] - compiler flag determining whether to generate position independent code (e.g., `-fPIC`)
+# @param {string} [INCLUDE] - list of includes (e.g., `-I /foo/bar -I /beep/boop/include`)
+# @param {string} [SOURCE_FILES] - list of source files
+# @param {string} [LIBPATH] - list of library paths (e.g., `-L /foo/bar -L /beep/boop`)
+# @param {string} [LIBRARIES] - list of libraries (e.g., `-lopenblas -lpthread`)
+#
+# @example
+# make
+#
+# @example
+# make all
+#/
+all: $(c_targets)
+
+.PHONY: all
+
+#/
+# Compiles C source files.
+#
+# @private
+# @param {string} CC - C compiler (e.g., `gcc`)
+# @param {string} CFLAGS - C compiler options
+# @param {(string|void)} fPIC - compiler flag determining whether to generate position independent code (e.g., `-fPIC`)
+# @param {string} INCLUDE - list of includes (e.g., `-I /foo/bar`)
+# @param {string} SOURCE_FILES - list of source files
+# @param {string} LIBPATH - list of library paths (e.g., `-L /foo/bar`)
+# @param {string} LIBRARIES - list of libraries (e.g., `-lopenblas`)
+#/
+$(c_targets): %.out: %.c
+ $(QUIET) $(CC) $(CFLAGS) $(fPIC) $(INCLUDE) -o $@ $(SOURCE_FILES) $< $(LIBPATH) -lm $(LIBRARIES)
+
+#/
+# Runs compiled examples.
+#
+# @example
+# make run
+#/
+run: $(c_targets)
+ $(QUIET) ./$<
+
+.PHONY: run
+
+#/
+# Removes generated files.
+#
+# @example
+# make clean
+#/
+clean:
+ $(QUIET) -rm -f *.o *.out
+
+.PHONY: clean
diff --git a/lib/node_modules/@stdlib/stats/base/dists/wald/kurtosis/examples/c/example.c b/lib/node_modules/@stdlib/stats/base/dists/wald/kurtosis/examples/c/example.c
new file mode 100644
index 000000000000..8274e65f08c4
--- /dev/null
+++ b/lib/node_modules/@stdlib/stats/base/dists/wald/kurtosis/examples/c/example.c
@@ -0,0 +1,40 @@
+/**
+* @license Apache-2.0
+*
+* Copyright (c) 2026 The Stdlib Authors.
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+* http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*/
+
+#include "stdlib/stats/base/dists/wald/kurtosis.h"
+#include
+#include
+
+static double random_uniform( const double min, const double max ) {
+ double v = (double)rand() / ( (double)RAND_MAX + 1.0 );
+ return min + ( v*(max-min) );
+}
+
+int main( void ) {
+ double lambda;
+ double mu;
+ double y;
+ int i;
+
+ for ( i = 0; i < 10; i++ ) {
+ mu = random_uniform( 0.1, 10.0 );
+ lambda = random_uniform( 0.1, 20.0 );
+ y = stdlib_base_dists_wald_kurtosis( mu, lambda );
+ printf( "µ: %.4f, λ: %.4f, Kurtosis(X;µ,λ): %.4f\n", mu, lambda, y );
+ }
+}
diff --git a/lib/node_modules/@stdlib/stats/base/dists/wald/kurtosis/examples/index.js b/lib/node_modules/@stdlib/stats/base/dists/wald/kurtosis/examples/index.js
new file mode 100644
index 000000000000..190d738d1cfa
--- /dev/null
+++ b/lib/node_modules/@stdlib/stats/base/dists/wald/kurtosis/examples/index.js
@@ -0,0 +1,32 @@
+/**
+* @license Apache-2.0
+*
+* Copyright (c) 2026 The Stdlib Authors.
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+* http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*/
+
+'use strict';
+
+var uniform = require( '@stdlib/random/array/uniform' );
+var logEachMap = require( '@stdlib/console/log-each-map' );
+var EPS = require( '@stdlib/constants/float64/eps' );
+var kurtosis = require( './../lib' );
+
+var opts = {
+ 'dtype': 'float64'
+};
+var mu = uniform( 10, EPS, 10.0, opts );
+var lambda = uniform( 10, EPS, 20.0, opts );
+
+logEachMap( 'µ: %0.4f, λ: %0.4f, Kurtosis(X;µ,λ): %0.4f', mu, lambda, kurtosis );
diff --git a/lib/node_modules/@stdlib/stats/base/dists/wald/kurtosis/include.gypi b/lib/node_modules/@stdlib/stats/base/dists/wald/kurtosis/include.gypi
new file mode 100644
index 000000000000..bee8d41a2caf
--- /dev/null
+++ b/lib/node_modules/@stdlib/stats/base/dists/wald/kurtosis/include.gypi
@@ -0,0 +1,53 @@
+# @license Apache-2.0
+#
+# Copyright (c) 2026 The Stdlib Authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# A GYP include file for building a Node.js native add-on.
+#
+# Main documentation:
+#
+# [1]: https://gyp.gsrc.io/docs/InputFormatReference.md
+# [2]: https://gyp.gsrc.io/docs/UserDocumentation.md
+{
+ # Define variables to be used throughout the configuration for all targets:
+ 'variables': {
+ # Source directory:
+ 'src_dir': './src',
+
+ # Include directories:
+ 'include_dirs': [
+ '=0.10.0",
+ "npm": ">2.7.0"
+ },
+ "os": [
+ "aix",
+ "darwin",
+ "freebsd",
+ "linux",
+ "macos",
+ "openbsd",
+ "sunos",
+ "win32",
+ "windows"
+ ],
+ "keywords": [
+ "stdlib",
+ "stdmath",
+ "statistics",
+ "stats",
+ "distribution",
+ "dist",
+ "moments",
+ "wald",
+ "inverse gaussian",
+ "inverse-gaussian",
+ "continuous",
+ "kurtosis",
+ "excess kurtosis",
+ "univariate"
+ ]
+}
diff --git a/lib/node_modules/@stdlib/stats/base/dists/wald/kurtosis/src/Makefile b/lib/node_modules/@stdlib/stats/base/dists/wald/kurtosis/src/Makefile
new file mode 100644
index 000000000000..2caf905cedbe
--- /dev/null
+++ b/lib/node_modules/@stdlib/stats/base/dists/wald/kurtosis/src/Makefile
@@ -0,0 +1,70 @@
+#/
+# @license Apache-2.0
+#
+# Copyright (c) 2026 The Stdlib Authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#/
+
+# VARIABLES #
+
+ifndef VERBOSE
+ QUIET := @
+else
+ QUIET :=
+endif
+
+# Determine the OS ([1][1], [2][2]).
+#
+# [1]: https://en.wikipedia.org/wiki/Uname#Examples
+# [2]: http://stackoverflow.com/a/27776822/2225624
+OS ?= $(shell uname)
+ifneq (, $(findstring MINGW,$(OS)))
+ OS := WINNT
+else
+ifneq (, $(findstring MSYS,$(OS)))
+ OS := WINNT
+else
+ifneq (, $(findstring CYGWIN,$(OS)))
+ OS := WINNT
+else
+ifneq (, $(findstring Windows_NT,$(OS)))
+ OS := WINNT
+endif
+endif
+endif
+endif
+
+
+# RULES #
+
+#/
+# Removes generated files for building an add-on.
+#
+# @example
+# make clean-addon
+#/
+clean-addon:
+ $(QUIET) -rm -f *.o *.node
+
+.PHONY: clean-addon
+
+#/
+# Removes generated files.
+#
+# @example
+# make clean
+#/
+clean: clean-addon
+
+.PHONY: clean
diff --git a/lib/node_modules/@stdlib/stats/base/dists/wald/kurtosis/src/addon.c b/lib/node_modules/@stdlib/stats/base/dists/wald/kurtosis/src/addon.c
new file mode 100644
index 000000000000..6c18c485ad88
--- /dev/null
+++ b/lib/node_modules/@stdlib/stats/base/dists/wald/kurtosis/src/addon.c
@@ -0,0 +1,22 @@
+/**
+* @license Apache-2.0
+*
+* Copyright (c) 2026 The Stdlib Authors.
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+* http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*/
+
+#include "stdlib/stats/base/dists/wald/kurtosis.h"
+#include "stdlib/math/base/napi/binary.h"
+
+STDLIB_MATH_BASE_NAPI_MODULE_DD_D( stdlib_base_dists_wald_kurtosis )
diff --git a/lib/node_modules/@stdlib/stats/base/dists/wald/kurtosis/src/main.c b/lib/node_modules/@stdlib/stats/base/dists/wald/kurtosis/src/main.c
new file mode 100644
index 000000000000..179f1c5f1daa
--- /dev/null
+++ b/lib/node_modules/@stdlib/stats/base/dists/wald/kurtosis/src/main.c
@@ -0,0 +1,43 @@
+/**
+* @license Apache-2.0
+*
+* Copyright (c) 2026 The Stdlib Authors.
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+* http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*/
+
+#include "stdlib/stats/base/dists/wald/kurtosis.h"
+#include "stdlib/math/base/assert/is_nan.h"
+
+/**
+* Returns the excess kurtosis of a Wald distribution with mean `mu` and shape parameter `lambda`.
+*
+* @param mu mean
+* @param lambda shape parameter
+* @return excess kurtosis
+*
+* @example
+* double y = stdlib_base_dists_wald_kurtosis( 2.0, 1.0 );
+* // returns 30.0
+*/
+double stdlib_base_dists_wald_kurtosis( const double mu, const double lambda ) {
+ if (
+ stdlib_base_is_nan( mu ) ||
+ stdlib_base_is_nan( lambda ) ||
+ mu <= 0.0 ||
+ lambda <= 0.0
+ ) {
+ return 0.0/0.0; // NaN
+ }
+ return 15.0 * mu / lambda;
+}
diff --git a/lib/node_modules/@stdlib/stats/base/dists/wald/kurtosis/test/fixtures/julia/REQUIRE b/lib/node_modules/@stdlib/stats/base/dists/wald/kurtosis/test/fixtures/julia/REQUIRE
new file mode 100644
index 000000000000..98be20b58ed3
--- /dev/null
+++ b/lib/node_modules/@stdlib/stats/base/dists/wald/kurtosis/test/fixtures/julia/REQUIRE
@@ -0,0 +1,3 @@
+Distributions 0.23.8
+julia 1.5
+JSON 0.21
diff --git a/lib/node_modules/@stdlib/stats/base/dists/wald/kurtosis/test/fixtures/julia/data.json b/lib/node_modules/@stdlib/stats/base/dists/wald/kurtosis/test/fixtures/julia/data.json
new file mode 100644
index 000000000000..5c72db38a5b5
--- /dev/null
+++ b/lib/node_modules/@stdlib/stats/base/dists/wald/kurtosis/test/fixtures/julia/data.json
@@ -0,0 +1 @@
+{"expected":[21.713965249702962,26.40780234000845,183.61182568211646,54.78313658380484,26.16441633794986,94.40532944501133,23.44618955146833,19.061797175411993,63.13285295107122,20.210535424172132,30.38641973186934,14.903446168276911,15.142858044458658,19.548850094962127,11.045365146840403,33.57549253388869,40.532171583016975,55.55743370910954,9.490619966437402,18.45607627995488,88.11789158768566,3.3870648506276053,36.3749356249228,12.451207945648408,18.542132716408922,77.72767569136282,16.13621746229233,31.03714228276024,38.83566402723719,99.27869775835447,13.68485063732703,15.815817562750562,14.6324611126601,25.703507645183244,36.70245284004088,35.00419051508744,42.12475171076584,21.969106136005887,5.122534346241508,96.81160637981337,19.072649556939254,72.15961828919862,42.45216201752851,152.0281178719037,42.66947969925179,18.058804622041418,28.241912420575694,57.31232875458171,48.55678182274236,13.684092388432859,46.83444834487093,52.16817577334687,24.461116887394535,27.266300130020603,41.98580800678281,49.14682488293742,15.06034207358659,3.571464442111775,12.535132968471103,12.698910105909729,17.051962277032764,17.463980454637273,26.361940328979312,49.68206448232837,110.04432843403997,25.717683294863388,100.82113200742316,28.573788357134607,10.225153010331182,56.49627153256127,77.90710988847756,26.23675480021863,39.73356350041856,22.2320120021314,38.52342417677097,19.270307015932122,11.070086298573775,6.281202165189575,75.12305809995571,13.659014669066933,56.916107761281125,137.42451904859197,36.43105049846161,34.681426136553945,11.597753937602077,10.578478900558409,57.93824181949993,31.30055828833333,13.147930631033173,40.37039810160703,5.785912863323165,24.48180843262954,38.529625319660795,73.21401088801811,43.597829511395304,138.57928523226656,8.63574232607563,21.379374770931165,20.40749144355704,12.518872993690938],"lambda":[4.154458383871866,5.209121645281801,0.5175869637752779,1.6675228733950966,4.649774060673657,0.8809090436132095,3.815662129247019,4.020457115350167,0.8366273216784205,2.920058169668083,4.0108939355321205,5.090754338527049,5.026916489849918,3.9244682698754403,4.87614147865132,3.2734148956962446,3.161600584541958,1.4308990128884105,4.401822813875512,3.069678594246356,0.9796374310298163,5.322708028079062,0.9126888557799346,4.610810013495774,2.3519505280238673,1.2421147120228584,3.290107155188441,3.14948547166171,2.0276951508367427,0.9159818304047175,3.8790247202862824,4.301689601254237,3.5994054225706646,3.584709998798521,3.6785537755872566,3.971143951478754,2.106038966840816,4.322794892047339,4.5317992028229845,0.7821963842948366,1.9268501614701274,1.1711401734905693,2.938593364579122,0.680256983960943,2.9475761857940093,3.420545863628659,5.288192170102284,0.6242276228308609,2.375211773585516,3.9601536142078757,0.9211719820932991,0.8402189530701194,4.710037796927744,4.8969332199011575,2.2074096074240823,1.6266675545995204,3.439018283103728,3.9489516410996837,3.6053950107955313,5.432598100530456,4.7279875612375335,4.293868874127982,5.393950287232151,2.5590274212265665,0.538435793788193,2.5693032320173876,0.9867192085505734,4.5371641490313,2.819472659536148,1.8567927605542285,1.3653363152018267,1.365293999809228,3.005549619984395,0.9328598552896701,3.6789732458515703,2.2349004204895193,3.088851388421756,3.7732999606708373,0.8669447869144421,4.053236264731206,2.092201982470546,0.923529932920711,3.16011797599274,3.9884872300051786,3.012097191104013,3.019753878943258,2.0971885669019983,1.9097989672232147,4.791712482037251,2.013768264122504,3.811777168153634,1.2713656693122761,3.3983161078647295,2.0278241888776223,1.9356015212749846,0.7737338956671853,4.140097534324784,3.1615431269752383,5.0352937462001695,4.363058399626363],"mu":[6.013984331915389,9.170763651577428,6.335672491202817,6.090142221988152,8.110574960057686,5.54416723155966,5.9641825031123235,5.1091425390164575,3.521244644958152,3.934395938581336,8.125113775005886,5.057985549344,5.074792187143047,5.114589460682024,3.590584209290541,7.32710115938462,8.543102491308094,5.29980513686521,2.78506849907244,3.77694815269036,5.754905662848283,1.2018904848039975,2.213266558305305,3.827343618394255,2.9073452555364394,6.436445967172218,3.5393256353576437,6.516735246763382,5.249792508503586,6.06249888619295,3.5389249277078023,4.535649196334548,3.511210658297543,6.14264139065884,9.00079643120304,9.267111962693296,5.91442457142448,6.33119598583814,1.5476198044487084,5.048379231204331,2.45000919189677,5.633935192148355,8.316642774449807,6.8945459293866636,8.384769481449034,4.118064630133459,9.956577342080188,2.385062582491556,7.68884265818672,3.612740528613791,2.8761721074727324,2.9221793354572982,7.6808523396463855,8.901416726032878,6.178658397975688,5.329703029910578,3.4528527827240394,0.940236024653764,3.0129403909456194,4.599204994678147,5.374764369366837,4.999202806169762,9.47966637396632,8.47585102356165,3.950120355484728,4.405101787299472,6.632143171969164,8.642931209066607,1.921969290146834,6.993457865331048,7.091293756210517,2.388058926880297,7.961413111953923,1.382623433273767,9.44844312566213,2.8711478168579223,2.2795900955532176,1.5800573255250268,4.341836239788491,3.6908809064771737,7.938666232843973,8.461043790573807,7.675094504299187,9.22176168426755,2.3289041372377812,2.129626846218711,8.100494555350565,3.985184926171269,4.200073554512104,5.4197751004671755,1.4703073699561104,2.075022050928332,8.7290564235864,9.89767614956485,5.625868341769611,7.14823268143571,2.3835210340833264,4.506121024404349,6.850514269425082,3.6413715979319248]}
diff --git a/lib/node_modules/@stdlib/stats/base/dists/wald/kurtosis/test/fixtures/julia/runner.jl b/lib/node_modules/@stdlib/stats/base/dists/wald/kurtosis/test/fixtures/julia/runner.jl
new file mode 100644
index 000000000000..fab1cf62510b
--- /dev/null
+++ b/lib/node_modules/@stdlib/stats/base/dists/wald/kurtosis/test/fixtures/julia/runner.jl
@@ -0,0 +1,73 @@
+#!/usr/bin/env julia
+#
+# @license Apache-2.0
+#
+# Copyright (c) 2026 The Stdlib Authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+import Distributions: kurtosis, InverseGaussian
+import JSON
+
+"""
+ gen( mu, lambda, name )
+
+Generate fixture data and write to file.
+
+# Arguments
+
+* `mu`: mean parameter
+* `lambda`: shape parameter
+* `name::AbstractString`: output filename
+
+# Examples
+
+``` julia
+julia> mu = rand( 1000 ) .* 10.0 .+ 0.1;
+julia> lambda = rand( 1000 ) .* 5.0 .+ 0.1;
+julia> gen( mu, lambda, "data.json" );
+```
+"""
+function gen( mu, lambda, name )
+ z = Array{Float64}( undef, length(mu) );
+ for i in eachindex(mu)
+ z[ i ] = kurtosis( InverseGaussian( mu[i], lambda[i] ) );
+ end
+
+ # Store data to be written to file as a collection:
+ data = Dict([
+ ("mu", mu),
+ ("lambda", lambda),
+ ("expected", z)
+ ]);
+
+ # Based on the script directory, create an output filepath:
+ filepath = joinpath( dir, name );
+
+ # Write the data to the output filepath as JSON:
+ outfile = open( filepath, "w" );
+ write( outfile, JSON.json(data) );
+ write( outfile, "\n" );
+ close( outfile );
+end
+
+# Get the filename:
+file = @__FILE__;
+
+# Extract the directory in which this file resides:
+dir = dirname( file );
+
+# Generate fixtures:
+mu = rand( 100 ) .* 10.0 .+ 0.5;
+lambda = rand( 100 ) .* 5.0 .+ 0.5;
+gen( mu, lambda, "data.json" );
diff --git a/lib/node_modules/@stdlib/stats/base/dists/wald/kurtosis/test/test.js b/lib/node_modules/@stdlib/stats/base/dists/wald/kurtosis/test/test.js
new file mode 100644
index 000000000000..cde816fef298
--- /dev/null
+++ b/lib/node_modules/@stdlib/stats/base/dists/wald/kurtosis/test/test.js
@@ -0,0 +1,121 @@
+/**
+* @license Apache-2.0
+*
+* Copyright (c) 2026 The Stdlib Authors.
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+* http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*/
+
+'use strict';
+
+// MODULES //
+
+var tape = require( 'tape' );
+var isnan = require( '@stdlib/math/base/assert/is-nan' );
+var isAlmostSameValue = require( '@stdlib/assert/is-almost-same-value' );
+var PINF = require( '@stdlib/constants/float64/pinf' );
+var NINF = require( '@stdlib/constants/float64/ninf' );
+var kurtosis = require( './../lib' );
+
+
+// FIXTURES //
+
+var data = require( './fixtures/julia/data.json' );
+
+
+// TESTS //
+
+tape( 'main export is a function', function test( t ) {
+ t.ok( true, __filename );
+ t.strictEqual( typeof kurtosis, 'function', 'main export is a function' );
+ t.end();
+});
+
+tape( 'if provided `NaN` for any parameter, the function returns `NaN`', function test( t ) {
+ var y = kurtosis( NaN, 1.0 );
+ t.strictEqual( isnan( y ), true, 'returns expected value' );
+ y = kurtosis( 1.0, NaN );
+ t.strictEqual( isnan( y ), true, 'returns expected value' );
+ y = kurtosis( NaN, NaN );
+ t.strictEqual( isnan( y ), true, 'returns expected value' );
+ t.end();
+});
+
+tape( 'if provided a nonpositive `lambda`, the function returns `NaN`', function test( t ) {
+ var y;
+
+ y = kurtosis( 2.0, 0.0 );
+ t.strictEqual( isnan( y ), true, 'returns expected value' );
+
+ y = kurtosis( 2.0, -1.0 );
+ t.strictEqual( isnan( y ), true, 'returns expected value' );
+
+ y = kurtosis( 1.0, NINF );
+ t.strictEqual( isnan( y ), true, 'returns expected value' );
+
+ y = kurtosis( PINF, NINF );
+ t.strictEqual( isnan( y ), true, 'returns expected value' );
+
+ y = kurtosis( NINF, NINF );
+ t.strictEqual( isnan( y ), true, 'returns expected value' );
+
+ y = kurtosis( NaN, NINF );
+ t.strictEqual( isnan( y ), true, 'returns expected value' );
+
+ t.end();
+});
+
+tape( 'if provided a nonpositive `mu`, the function returns `NaN`', function test( t ) {
+ var y;
+
+ y = kurtosis( 0.0, 2.0 );
+ t.strictEqual( isnan( y ), true, 'returns expected value' );
+
+ y = kurtosis( -1.0, 2.0 );
+ t.strictEqual( isnan( y ), true, 'returns expected value' );
+
+ y = kurtosis( NINF, 1.0 );
+ t.strictEqual( isnan( y ), true, 'returns expected value' );
+
+ y = kurtosis( NINF, PINF );
+ t.strictEqual( isnan( y ), true, 'returns expected value' );
+
+ y = kurtosis( NINF, NINF );
+ t.strictEqual( isnan( y ), true, 'returns expected value' );
+
+ y = kurtosis( NINF, NaN );
+ t.strictEqual( isnan( y ), true, 'returns expected value' );
+
+ t.end();
+});
+
+tape( 'the function returns the excess kurtosis of a Wald distribution', function test( t ) {
+ var expected;
+ var lambda;
+ var mu;
+ var y;
+ var i;
+
+ expected = data.expected;
+ mu = data.mu;
+ lambda = data.lambda;
+ for ( i = 0; i < mu.length; i++ ) {
+ y = kurtosis( mu[i], lambda[i] );
+ if ( y === expected[i] ) {
+ t.strictEqual( y, expected[i], 'mu:'+mu[i]+', lambda: '+lambda[i]+', y: '+y+', expected: '+expected[i] );
+ } else {
+ t.ok( isAlmostSameValue( y, expected[i], 1000 ), 'within tolerance. mu: '+mu[i]+'. lambda: '+lambda[i]+'. y: '+y+'. E: '+expected[ i ]+'.' );
+ }
+ }
+ t.end();
+});
diff --git a/lib/node_modules/@stdlib/stats/base/dists/wald/kurtosis/test/test.native.js b/lib/node_modules/@stdlib/stats/base/dists/wald/kurtosis/test/test.native.js
new file mode 100644
index 000000000000..f6d55a9392dc
--- /dev/null
+++ b/lib/node_modules/@stdlib/stats/base/dists/wald/kurtosis/test/test.native.js
@@ -0,0 +1,130 @@
+/**
+* @license Apache-2.0
+*
+* Copyright (c) 2026 The Stdlib Authors.
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+* http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*/
+
+'use strict';
+
+// MODULES //
+
+var resolve = require( 'path' ).resolve;
+var tape = require( 'tape' );
+var tryRequire = require( '@stdlib/utils/try-require' );
+var isnan = require( '@stdlib/math/base/assert/is-nan' );
+var isAlmostSameValue = require( '@stdlib/assert/is-almost-same-value' );
+var PINF = require( '@stdlib/constants/float64/pinf' );
+var NINF = require( '@stdlib/constants/float64/ninf' );
+
+
+// FIXTURES //
+
+var data = require( './fixtures/julia/data.json' );
+
+
+// VARIABLES //
+
+var kurtosis = tryRequire( resolve( __dirname, './../lib/native.js' ) );
+var opts = {
+ 'skip': ( kurtosis instanceof Error )
+};
+
+
+// TESTS //
+
+tape( 'main export is a function', opts, function test( t ) {
+ t.ok( true, __filename );
+ t.strictEqual( typeof kurtosis, 'function', 'main export is a function' );
+ t.end();
+});
+
+tape( 'if provided `NaN` for any parameter, the function returns `NaN`', opts, function test( t ) {
+ var y = kurtosis( NaN, 1.0 );
+ t.strictEqual( isnan( y ), true, 'returns expected value' );
+ y = kurtosis( 1.0, NaN );
+ t.strictEqual( isnan( y ), true, 'returns expected value' );
+ y = kurtosis( NaN, NaN );
+ t.strictEqual( isnan( y ), true, 'returns expected value' );
+ t.end();
+});
+
+tape( 'if provided a nonpositive `lambda`, the function returns `NaN`', opts, function test( t ) {
+ var y;
+
+ y = kurtosis( 2.0, 0.0 );
+ t.strictEqual( isnan( y ), true, 'returns expected value' );
+
+ y = kurtosis( 2.0, -1.0 );
+ t.strictEqual( isnan( y ), true, 'returns expected value' );
+
+ y = kurtosis( 1.0, NINF );
+ t.strictEqual( isnan( y ), true, 'returns expected value' );
+
+ y = kurtosis( PINF, NINF );
+ t.strictEqual( isnan( y ), true, 'returns expected value' );
+
+ y = kurtosis( NINF, NINF );
+ t.strictEqual( isnan( y ), true, 'returns expected value' );
+
+ y = kurtosis( NaN, NINF );
+ t.strictEqual( isnan( y ), true, 'returns expected value' );
+
+ t.end();
+});
+
+tape( 'if provided a nonpositive `mu`, the function returns `NaN`', opts, function test( t ) {
+ var y;
+
+ y = kurtosis( 0.0, 2.0 );
+ t.strictEqual( isnan( y ), true, 'returns expected value' );
+
+ y = kurtosis( -1.0, 2.0 );
+ t.strictEqual( isnan( y ), true, 'returns expected value' );
+
+ y = kurtosis( NINF, 1.0 );
+ t.strictEqual( isnan( y ), true, 'returns expected value' );
+
+ y = kurtosis( NINF, PINF );
+ t.strictEqual( isnan( y ), true, 'returns expected value' );
+
+ y = kurtosis( NINF, NINF );
+ t.strictEqual( isnan( y ), true, 'returns expected value' );
+
+ y = kurtosis( NINF, NaN );
+ t.strictEqual( isnan( y ), true, 'returns expected value' );
+
+ t.end();
+});
+
+tape( 'the function returns the excess kurtosis of a Wald distribution', opts, function test( t ) {
+ var expected;
+ var lambda;
+ var mu;
+ var y;
+ var i;
+
+ expected = data.expected;
+ mu = data.mu;
+ lambda = data.lambda;
+ for ( i = 0; i < mu.length; i++ ) {
+ y = kurtosis( mu[i], lambda[i] );
+ if ( y === expected[i] ) {
+ t.strictEqual( y, expected[i], 'mu:'+mu[i]+', lambda: '+lambda[i]+', y: '+y+', expected: '+expected[i] );
+ } else {
+ t.ok( isAlmostSameValue( y, expected[i], 1000 ), 'within tolerance. mu: '+mu[i]+'. lambda: '+lambda[i]+'. y: '+y+'. E: '+expected[ i ]+'.' );
+ }
+ }
+ t.end();
+});