1. 18
ECONOMIC INEQUALITY
CHAPTER

2. Objectives After studying this chapter, you will able to
Describe the inequality in income and wealth in the United States and the trends in inequality
Explain the features of the labor market that contribute to economic inequality
Describe the scale of income redistribution by government

3. Rags and Riches
Homelessness and abject poverty exists alongside extreme wealth.
What determines the distribution of economic well-being?
How much redistribution does government do to limit extreme poverty?

4. Measuring Economic Inequality
The census bureau defines a household’s income as money income, which equals market income plus cash payments to households by the government.
Market income equals wages, interest, rent, and profit earned by the household in factor markets, before paying income taxes.

5. Measuring Economic Inequality
The Distribution of Income
Figure 18.1 shows the distribution of income across the 106 million households in the United States in 2001.

6. Measuring Economic Inequality
The mode income is the most common income and was about $13,000.
The median income is the level of income that separates the population into two groups of equal size and was $42,228.
The mean income is the average income and was $58,208.

7. Measuring Economic Inequality
A distribution in which the mean exceeds the median and the median exceeds the mode is positively skewed, which means it has a long tail of high values.
The distribution of income in the United States is positively skewed.

8. Measuring Economic Inequality
Figure 18.2 shows the distribution of income shares for the United States in 2001.

9. Measuring Economic Inequality
The poorest 20% of the population in 2001 received only 3.5% of the total income.
The middle 20% of the received 14.5% of total income.
The richest 20% received 50.1% of total income.

10. Measuring Economic Inequality
The Income Lorenz Curve
The income Lorenz curve graphs the cumulative percentage of income earned against the cumulative percentage of households.
Figure 18.3 shows the income Lorenz curve for the income shares in Figure 18.2.

11. Measuring Economic Inequality
The vertical axis of a Lorenz curve is the cumulative percentage of total income.
The horizontal axis is the cumulative percentage of households.

12. Measuring Economic Inequality
If everyone has the same income, the income Lorenz curve is a 45 degree line from the lower left corner to the upper right corner. This line is called the line of equality.
The Lorenz curve shows the cumulative distribution of income.

13. Measuring Economic Inequality
The closer the Lorenz curve is from the line of equality, the more equal is the distribution of income.

14. Measuring Economic Inequality
The Distribution of Wealth
Wealth is the value of all the things that are owned by a household at a given point in time.
The distribution of wealth is another way of examining the degree of economic inequality.

15. Measuring Economic Inequality
A wealth Lorenz curve measures the distribution of wealth in the same way an income Lorenz curve measures the distribution of income.
The distribution of wealth is even more unequally distributed than income.

16. Measuring Economic Inequality
Wealth Versus Income
Wealth is a stock of assets and income is a flow of earnings that result from a given stock of wealth.
The reason that wealth is more unequally distributed than income is that wealth does not measure the quantity of human capital—only income reflects the quantity of human capital.
Because wealth does not reflect potential for income from human capital, income is a more accurate measure of economic inequality.

17. Measuring Economic Inequality
Annual or Lifetime Income and Wealth?
A household’s income and wealth change over time.
A household headed by a young person starts out with moderate income and accumulates wealth for retirement years.
A middle-age headed household is in its highest earning years and enjoys the highest level of wealth.
A households headed by an older, retired person has lower earning and is consuming, rather than accumulating, its wealth.

18. Measuring Economic Inequality
The Gini Ratio
To measure inequality as an index number, we use the Gini ratio, which equals the ratio of blue area to the red area in the two figures below.

19. Measuring Economic Inequality
The Gini Ratio
With perfect equality, the Lorenz curve is the line of equality and the Gini ratio is zero.

20. Measuring Economic Inequality
The Gini Ratio
With the most extreme inequality—one person has all the income—the Lorenz curve runs along the axes and the Gini ratio is one.

21. Measuring Economic Inequality
The Gini Ratio
The closer the Gini ratio is to one, the more unequal is the distribution of income. In 2001, the U.S. Gini ratio was 0.45.

22. Measuring Economic Inequality
Trends in Inequality
Figure 18.5 shows trends in the U.S. Gini ratio.
The trend is toward greater inequality.

23. Measuring Economic Inequality
Who Are the Rich and the Poor?
Figure 18.6 on the next slide identifies the five characteristics that appear to influence the amount of income earned by a household.
These characteristics are:
Education
Type of household
Size of Household
Age of householder
Race

24. Measuring Economic Inequality

25. Measuring Economic Inequality
Poverty
Poverty is a situation in which a household’s income is too low to be able to buy the quantities of food, shelter, and clothing that are deemed necessary.
Poverty is a relative concept.
In 2000, the poverty level calculated by the Social Security Administration for a four-person family was $17,761.
31.1 million Americans lived in households with incomes below this poverty level, which amounts to 11.3 percent of the total population at that time.

26. Measuring Economic Inequality
There has historically been an over-representation of minority households living in poverty in the United States. In the year 2000, 9.4percent of white households lived in poverty while 21.7 percent of Hispanic households and 31.3 percent of black households lived in poverty.

27. The Sources of Economic Inequality
Inequality arises from unequal labor market outcomes and from unequal ownership of capital.
Two significant features of labor markets create income differences among individuals:
Human capital differences
Discrimination.

28. The Sources of Economic Inequality
Human Capital
The more human capital a person possesses, the more income that person likely earns, other things remaining the same.
On the demand side of the labor market, high-skilled workers generate a larger marginal revenue product than low-skilled workers.
So firms are willing to pay a higher wage rate for high-skilled labor.

29. The Sources of Economic Inequality
Figure 18.7(a) shows the difference in demand curves for high-skilled versus low-skilled labor.

30. The Sources of Economic Inequality
On the supply side of the labor market, high-skilled workers incur a cost of acquiring their skills—money costs as well as time costs
So high-skilled workers are willing to supply labor only at wage rates that compensate them for those costs, which exceed the wage rates at which low-skilled workers are willing to supply labor.

31. The Sources of Economic Inequality
Figure 18.7(b) shows the difference in supply curves for high-skilled versus low-skilled labor.

32. The Sources of Economic Inequality
The combination of higher demand and lower supply for high-skilled workers relative to low-skilled workers creates a higher equilibrium wage rate for those workers who have attained greater levels of human capital.

33. The Sources of Economic Inequality
Figure 18.7(c) shows the difference in equilibrium wages for high-skilled versus low-skilled labor.

34. The Sources of Economic Inequality
Figure 18.8 shows how technological change combined with skill differences have widened the gap between low incomes and high incomes.
The demand for low-skilled labor has decreased and the wage rate has fallen.

35. The Sources of Economic Inequality
The demand for high-skilled labor has increased and the wage rate has risen.

36. The Sources of Economic Inequality
Discrimination
While the level of human capital attained varies across households, discrimination alone does not explain all the observed inequality in income.
If the levels of marginal revenue product of one race or one sex are perceived to be higher than that of another race or another sex, the equilibrium wages will vary across each racial or gender group of households, despite holding the level of human capital constant.

37. The Sources of Economic Inequality
If firms perceive white males to be more productive workers than black females, then the perceived marginal revenue product curves (which are the labor demand curves) for white men would be higher than that for black women.

38. The Sources of Economic Inequality
Figure 18.9 shows the potential effect of discrimination of the wage rates of white men and black women.
If black women are discriminated against, the perceived MRP is lower and their wage rate and employment level decrease.

39. The Sources of Economic Inequality
If white men are discriminated for, the perceived MRP is higher and their wage rate and employment level increase.

40. The Sources of Economic Inequality
Economists disagree to the extent that discrimination pervades the labor market.
One line of reasoning states that those firms that practice race or sex discrimination in the labor market would face higher production costs (pay higher wages for the same marginal revenue product) than those firms that do not.
If this line of reasoning is correct, the profit margins for the firms practicing discrimination will be lower and that the market price of their goods and services would be higher than non-discriminating firms.

41. The Sources of Economic Inequality
Either way, the market pressures increase the opportunity cost to firms (and the consumers who buy their product) for practicing race or sex discrimination, eventually eliminating these practices.
Another line of reasoning is that claims of sex discrimination can be explained by differences between the men and women regarding their willingness, on average, to specialize in providing income generating labor versus providing non-income generating labor in the home.

42. The Sources of Economic Inequality
More women than men work at home for a portion of their adult life while engaged in child rearing and/or running the household.
This allocation of time means that women’s wages will be lower, on average, than men’s wages.
Accounting for this difference in labor specialization has been found to explain much of the wage differentials between men and women.

43. The Sources of Economic Inequality
Unequal Ownership of Capital
Income inequality is increased by the unequal distribution of wealth.
Unequal wealth results from savings and wealth transfers between generations.
There are two significant aspects of intergenerational wealth transfers that increase economic inequality:
Debt cannot be transferred across generations
Marriage concentrates wealth

44. Income Redistribution
The governments in the United States use three main ways to redistribute income to alleviate some degree of economic inequality:
Income taxes
Income maintenance programs
Subsidized services.

45. Income Redistribution
Income Taxes
The U.S. federal government and most state governments tax incomes.
By taxing incomes of different levels at different tax rates, economic inequality can be decreased.
A progressive income tax taxes household incomes at an average rate that rises with income.
The U.S. income tax system and all state income tax systems are progressive income tax systems.

46. Income Redistribution
A regressive income tax taxes income at average rates that fall with income, thereby redistributing income away from poorer taxpayers.
A proportional income tax (also called a flat-rate income tax) taxes income at a constant average rate for all income levels.

47. Income Redistribution
Income Maintenance Programs
Three major types of programs provide direct payments to individuals:
Social Security Programs
Unemployment Compensation
Welfare Programs

48. Income Redistribution
Subsidized Services
A great deal of income redistribution takes the form of subsidized services, where people other than those who pay for it consume the services provided.
An example is primary and secondary public education, as well as state colleges and universities.
The students at these institutions generally pay tuition and fees that range from 20 to 25% of the actual expenses for educating a college student.
The families of these students enjoy a sizeable subsidy for acquiring human capital.

49. Income Redistribution
The Scale of Income Redistribution
The extent of the government income redistribution can be determined by looking at the difference between market income and money income minus income taxes.
In 2001, the poorest 20 percent of households received only 0.9 percent of total money income earned in the United States, but received 4.6 percent of total market income.
In 2001, the richest 20 percent of households received 55.6 percent of total money income earned in the United States, but received 46.7 percent of total market income.

50. Income Redistribution
Figure shows the influence of government income redistribution efforts in 2001.
The distribution after taxes and benefits is …
…more equal than the distribution of market income.

51. Income Redistribution
The three lower income groups gain …
…and the highest income group loses.

52. Income Redistribution
The Big Tradeoff
Redistributing income leads to a tradeoff between equity and efficiency, known as the big tradeoff. Programs to redistribute income are inefficient for three reasons:
The process of income redistribution uses up resources that could have otherwise been used for producing goods and services.
Redistribution of income requires taxes to be imposed on the economy, which was shown in an earlier chapter to generate a deadweight loss in the markets that are taxed.

53. Income Redistribution
Income redistribution decreases the incentives for taxpaying workers to provide labor when leisure is a normal good (by decreasing income from work) and decreases the incentives for income assistance recipient’s to provide labor and earn income.
A major challenge in the U. S. today is finding ways to assist the poorest identifiable group: young minority women who have not completed high school, have dependent children, and live without a spouse in the household.

54. Income Redistribution
The long-term solution to their plight is education and job training—acquiring human capital.
The short-term solution is enforcing child support payments from absent fathers and former husbands, and providing welfare assistance. But it must be designed to minimize the disincentive to become self-sufficient.

55. Income Redistribution
Welfare reform occurred in 1996 when the Temporary Assistance for Needy Families (TANF) program was implemented.
TANF is a block grant to the states, not an open-ended entitlement program for individuals.
An adult member of a family receiving assistance must either work or perform community service and there is a five-year limit for receiving assistance.

56. THE END