Refer to the table below. The average cost of 5 units of activity is:Units ofActivity TotalCostTotalBenefit0$0$01$2$122$6$223$12$304$20$365$30$406$42$427$56$43

What role does the interest rate play in the economy? Is the distinction between real and nominal interest rates an important one in discussing these roles?

What will be an ideal response?

Which of the following has not been identified by research that tries to address the self-selection issue regarding the returns to schooling?

A. When both a high school graduate and a college graduate are placed in the type of job that college graduates typically fill, the college graduate would be more productive. B. In general, workers appear to choose schooling amounts that maximize lifetime income. C. When both a high school graduate and a college graduate are placed in the type of job that high school graduates typically fill, the high school graduate would be more productive. D. There are many kinds of ability that are rewarded in the workplace. E. All of the above have been identified by the research on the returns to schooling.