Inequality
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AP Microeconomics › Inequality
A tax on gasoline is often considered regressive because...
low-income households generally spend a larger percentage of their total income on gasoline than high-income households.
high-income individuals typically own more fuel-efficient hybrid or electric vehicles than low-income individuals.
the revenue generated from the tax is used to fund projects that do not benefit low-income communities.
the tax is levied as a fixed amount per gallon, which prevents it from being progressive relative to income.
Explanation
A tax is regressive if it takes a larger percentage of income from people in lower-income groups than from those in higher-income groups. Because transportation costs, including gasoline, represent a larger share of a low-income family's budget, a gasoline tax has a disproportionately larger impact on them.
Income levels and poverty rates often vary significantly across different demographic groups within a single country. This fact suggests that...
factors such as discrimination, and unequal access to human and social capital may be present.
the marginal productivity theory of income distribution fully explains all income differences.
the country must have a regressive tax system as its primary source of government revenue.
the country's Lorenz curve is a straight 45-degree line.
Explanation
While productivity differences explain some income variation, persistent and significant gaps between demographic groups (defined by race, gender, etc.) often point to systemic issues. These can include historical and ongoing discrimination in labor and housing markets, as well as unequal access to quality education (human capital) and influential networks (social capital).
A significant decline in labor union membership and power within a country can contribute to rising income inequality primarily because it...
leads governments to implement more regressive tax policies to compensate for lost union dues and revenues.
causes many non-unionized firms to go out of business, which reduces the total number of available jobs.
shifts production away from capital-intensive industries toward labor-intensive ones, lowering overall productivity.
reduces the collective bargaining power of lower and middle-income workers, potentially suppressing their wage growth relative to top earners.
Explanation
Labor unions use collective bargaining to negotiate for higher wages, better benefits, and improved working conditions for their members. A decline in union power diminishes this countervailing force, which can lead to a larger share of national income going to capital owners and high-level executives, thus widening the income gap.
The primary way in which inheritance contributes to economic inequality is by...
funding government transfer payments through taxes on large estates, which serves to reduce poverty.
ensuring that factors of production are compensated according to their respective marginal revenue products.
perpetuating differences in wealth across generations as financial and physical assets are transferred directly to heirs.
increasing the overall level of human capital in the economy by allowing some individuals to afford higher education.
Explanation
Inheritance is a direct transfer of wealth (stocks, bonds, real estate, etc.) from one generation to the next. This perpetuates wealth disparities, as families that have already accumulated significant assets can pass them on, giving their heirs a substantial economic advantage.
An individual from a low-income background obtains a scholarship to a prestigious university, earns a degree in a high-demand field, and then uses a professional network from that university to secure a high-paying job. This scenario best illustrates that economic outcomes can be influenced by...
a progressive tax system that has successfully eliminated all income inequality.
the complete elimination of labor market discrimination in all sectors of the economy.
a combination of an individual's human capital and their access to social capital.
inherited wealth as the sole determinant of an individual's lifetime economic success.
Explanation
This scenario highlights two key sources of economic advancement. The degree in a high-demand field represents an increase in the individual's human capital (skills and knowledge). The professional network from the university represents social capital (valuable connections). Both contributed to the successful outcome.
Which of the following best describes how differences in human capital contribute to income inequality?
Discrimination based on race or gender in the labor market prevents certain groups from receiving fair compensation.
Individuals with greater inherited wealth are able to purchase more goods and services from the market.
A regressive tax system places a proportionally greater burden on low-income individuals, regardless of their skill level.
Workers with more education, job-specific training, and relevant skills are typically more productive and thus command higher wages.
Explanation
Human capital refers to the economic value of a worker's experience and skills. Individuals who invest in their human capital through education and training tend to have higher marginal productivity, which leads to higher wages and contributes to income differentials.
The concept of social capital helps to explain income inequality by suggesting that individuals with...
higher levels of education and specialized job training tend to earn higher incomes.
stronger and more extensive personal and professional networks can gain access to better job opportunities.
greater bargaining power within a labor union can negotiate for higher wages than non-union workers.
significant inherited financial assets and property have a lifelong economic advantage over others.
Explanation
Social capital refers to the value inherent in social networks. 'Who you know' can be a significant factor in economic success by providing access to information, job leads, and other opportunities that are not available to those outside these networks, thus contributing to income disparities.
According to the marginal productivity theory of income distribution, an individual's income in a competitive market is primarily determined by...
the social and political power held by the group to which the individual belongs.
the contribution their last unit of labor adds to their employer's total revenue.
the amount of wealth they inherited from their parents or other relatives.
the level of taxation imposed by the government on different income brackets.
Explanation
The marginal productivity theory of income distribution posits that each factor of production, including labor, is paid a price equal to its marginal revenue product (MRP). MRP is the additional revenue generated by employing one more unit of that factor. Therefore, an individual's income is linked to their productivity and the value of the output they help create.
Based on the income distribution shown, two economies (A and B) report the following shares of total annual income by quintile.
Economy A: Bottom 20% = 6%, Second 20% = 11%, Middle 20% = 17%, Fourth 20% = 24%, Top 20% = 42%.
Economy B: Bottom 20% = 3%, Second 20% = 8%, Middle 20% = 14%, Fourth 20% = 22%, Top 20% = 53%.
Which distribution shows greater income inequality?
Economy B shows greater inequality because the top 20% receives a larger share of income.
Economy A shows greater inequality because the top 20% receives a smaller share of income.
Economy A shows greater inequality because the bottom 40% receives a smaller share of income.
Economy B shows greater inequality because its total income is higher.
Economy A shows greater inequality because equal shares across quintiles would indicate inequality.
Explanation
This question tests your ability to interpret income inequality from quintile data. The Lorenz curve plots cumulative income share against cumulative population share, with the 45-degree line representing perfect equality. Looking at the data, Economy B shows the bottom 20% receiving only 3% of income (vs 6% in A) and the top 20% receiving 53% (vs 42% in A). This represents a more unequal distribution because income is more concentrated at the top. A common misconception is thinking that higher total income means greater inequality, but inequality measures distribution, not absolute amounts. To assess inequality, compare how far each distribution deviates from equal shares (20% each) - the greater the deviation, especially concentration at the top, the greater the inequality.
Based on the income distribution shown, a city reports the following shares of total annual income by quintile before and after a policy change.
Before: Bottom 20% = 4%, Second 20% = 9%, Middle 20% = 14%, Fourth 20% = 23%, Top 20% = 50%.
After: Bottom 20% = 5%, Second 20% = 10%, Middle 20% = 15%, Fourth 20% = 23%, Top 20% = 47%.
Which statement best describes the change in inequality?
Inequality increased because equal quintile shares would indicate inequality.
Inequality increased because the top 20% receives a smaller share of income.
Inequality increased because the bottom 20% receives a larger share of income.
Inequality decreased because the bottom 60% receives a larger combined share of income.
Inequality decreased because total income must have fallen.
Explanation
This question tests interpretation of changing income inequality over time. The Lorenz curve visualizes income distribution, with movement toward the equality line indicating reduced inequality. Comparing the distributions, the bottom three quintiles increased their shares (4% to 5%, 9% to 10%, 14% to 15%) while the top quintile decreased from 50% to 47%. This redistribution from the top to lower quintiles represents decreased inequality. A common misconception is thinking that any increase in lower quintile shares means increased inequality. The key insight is that when income shifts from higher to lower quintiles, making the distribution more equal, inequality decreases - exactly what occurred with this policy change.