Do I need to install anything?

No. It runs in any modern browser, free, with no account required.

For Hobbyists & Makers · Lorenz & Gini

Lorenz & Gini for a monopoly

Built for hobbyists & makers exploring it for fun. Play with real physics and math, no license and no setup — just open and tinker. Simulate a monopoly live below — adjust the inputs and watch it respond, right in your browser.

Lorenz Curve & GiniLive

measuring inequality

Controls

Presets

Inequality level

The Lorenz curve plots the cumulative share of income against the cumulative share of population, from poorest to richest. Perfect equality is the diagonal; the more the curve bows below it, the more unequal the distribution. The Gini coefficient is twice the area between them — 0 is total equality, 1 is one person owning everything.

▶ Run in Python

Data Inspector

Gini coefficient0.628

Inequalityhigh

Top 10% share37%

Governing equation

G = 1 - 2 \int_{0}^{1} L (p) d p = \frac{A}{A + B} = 0.628

Reading this result: High inequality (Gini 0.628): the curve bows far under the diagonal and the richest 10% capture 37% of all income.

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Frequently asked questions

Is this good for hobbyists & makers?: Yes — this version of "Lorenz & Gini for a monopoly" is framed for hobbyists & makers exploring it for fun. Play with real physics and math, no license and no setup — just open and tinker.
Do I need to install anything?: No. It runs in any modern browser, free, with no account required.