If an increase in the price of good X causes the demand curve for product Y to shift to the right, then X and Y are most likely to be which of the following?

Measured in dollar terms, the two largest U.S. antipoverty programs are

a. cash transfers and medical care b. cash transfers and food assistance c. food and housing assistance d. medical care and food assistance e. medical care and housing assistance

If the four-firm concentration ratio in an industry increases, the industry

a. must have become more competitive. b. must have become a monopoly. c. must have become less competitive, although not necessarily a monopoly. d. may or may not have become less competitive.