In a market economy, individuals' choices and consumption patterns are
limited by how much money they have. No one (or very few) people are able to
buy everything they would like to have, and so they have to make choices in
tradeoff situations in order to best use what money they have. Obviously, the
very poor have very limited choices, while the very rich have a wide range of
choices. This discrepancy attracts the interest of social activists, the
government, the general public, and economists alike. Economists study this
inequality of means using measures of income distribution.
Economists look at several different statistics when studying income
distribution, including the amount of income earned by segments of the
population, the difference between actual and equal income distributions, and
income mobility.
In this unit, we will look at the various ways of measuring and studying income
distribution using Lorenz curves and Gini coefficients, and we will
briefly look at different ways that the government tries to address issues in
income distribution.