IneqPy 0.0.2

A Python Package To Quantitative Analysis Of Inequality

This package provides statistics to do a properly quantitative analysis of inequality. Among the estimators provided by this package you can find:

• Atkinson Index

• Gini Index

• Kakwani Index

• Lorenz curve

• Variance

• Mean

• Kurtosis

• Skewness

First-steps

• Installation

• Examples

Install

git clone https://github.com/mmngreco/IneqPy.git
cd IneqPy
pip install .

Examples

Some examples of how use this package: Data of example:

import pandas as pd
import numpy as np
import ineqpy
d
             renta   factor
0        -13004.12   1.0031
89900    141656.97   1.4145
179800     1400.38   4.4122
269700   415080.96   1.3295
359600    69165.22   1.3282
449500     9673.83  19.4605
539400    55057.72   1.2923
629300     -466.73   1.0050
719200     3431.86   2.2861
809100      423.24   1.1552
899000        0.00   1.0048
988900     -344.41   1.0028
1078800   56254.09   1.2752
1168700   60543.33   2.0159
1258600    2041.70   2.7381
1348500     581.38   7.9426
1438400   55646.05   1.2818
1528300       0.00   1.0281
1618200   69650.24   1.2315
1708100   -2770.88   1.0035
1798000    4088.63   1.1256
1887900       0.00   1.0251
1977800   10662.63  28.0409
2067700    3281.95   1.1670

Descriptive statistics

ineqpy.xbar(x=d.renta, weights=d.factor)
20444.700666031338
ineqpy.var(x=d.renta, weights=d.factor)
2982220948.7413292
x, w = d.renta.values, d.factor.values

Note that the standardized moment for order n, retrieve the value in that column:

n	value
1	0
2	1
3	Skew
4	Kurtosis

A helpful table of interpretation of the moments

ineqpy.stdmoment(x, w, 1)  # = 0
2.4624948200717338e-17
ineqpy.stdmoment(x, w, 2)  # = 1
1.0
ineqpy.stdmoment(x, w, 3)  # = skew
5.9965055750379426
ineqpy.skew(x, w)
5.9965055750379426
ineqpy.stdmoment(x, w, 4)  # = kurtosis
42.319928851703004
ineqpy.kurt(x, w)
42.319928851703004

Inequality estimators

# pass a pandas.DataFrame and inputs as strings
ineqpy.gini(df=d, income='renta', weights='factor')
0.76739136365917116
# you can pass arrays too
ineqpy.gini(income=d.renta.values, weights=d.factor.values)
0.76739136365917116