All true or false

I don't need explain.

1.Because the U.S. has a progressive income tax system, the distribution of income among households after taking into account the effects of taxes and transfer payments is more equal than the distribution of before-tax income.

2.Approximately four-fifths of national income in the United States represents a return to human capital while the other one-fifth represents returns to physical capital.

3.Other things constant, if the demand for a final product is relatively price elastic, the demands for the resources used to produce the product will tend to be relatively price elastic.

4.Collusion is likely to be more successful if barriers to entry are high and the number of producers in the industry is small.

5.Other things constant, if the demand for a final product is relatively price inelastic, the demands for the resources used to produce the product will tend to be relatively price inelastic.

6.In the United States, there is a strong negative relationship between the earnings of workers and their attained educational level.

7.The increasing gap between the wages earned by college graduates and the wages earned by those with less education has not contributed to the rise in income inequality in the United States.

8.In general, higher productivity of workers leads to higher wages of workers.

9.In a market-based economy, there is a fixed "economic pie" available for the government to allocate to individuals and households.

10. The quantity demanded for a particular resource will be negatively related to its price, becauseproducers will substitute towards other factors of production if the price of the resource increases.

11. Working conditions andother non-wage job characteristics are defined as non-pecuniary job characteristics.

12. Immobility of labor cannot be a source of wage differentials in an economy.

13. One likely reason why health care costs so much today is that consumers pay for so much of it "out of pocket".

14. Changes in a corporation's stock price happen too slowly to give corporate officers much feedback on how market investors currently evaluate the decisions of company management.

15. The Present Value (PV) of a payment to be received one year from now will rise if the interest rate rises.