In the economy of Talikastan in 2015, consumption was $4000, exports were $800, GDP was $7500, imports were $200, and investment was $1000 . What were Talikastan's government purchases in 2015?

Which of the following questions or statements regarding medical school is normative?

A) How do changes in expected future incomes affect the decisions of medical students about which specialty to choose? B) What role does tuition play in a student's decision about whether to attend medical school? C) Have tuition increases had a large effect or a small effect on the number of applications to medical school? D) Medical students who enter specialized fields make a larger contribution to society than do student who enter primary care.

The marginal physical product (MPP) is calculated by

A) dividing total physical product by labor. B) dividing the change in total physical product by the change in the input. C) dividing the change in total cost by the change in labor. D) the difference between the output of skilled and unskilled workers.