Lorenz curves can be used to illustrate the changes in income distribution over time.

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Lorenz curves are commonly used to compare income distribution in different time periods or in different countries. They plot the cumulative percentage of income received against the cumulative percentage of individuals or households in a population, and thus help to visually depict the degree of income inequality in a given society. By comparing the shape and position of Lorenz curves over time, analysts can identify whether income inequality has increased or decreased, and which groups of people have benefited or suffered the most from changes in economic policies.

Lorenz Curves Can Be Used to Illustrate the Changes in Income