Policies such as rent control and trade barriers persist a. because economists are about evenly divided as to the merits of those policies. b. because almost all economists agree that those policies have no discernible economic effects. c. despite the fact that almost all economists agree that those policies are undesirable. d. because almost all economists agree that those policies are desirable.

C. Despite the fact that almost all economists agree that those policies are undesirable.

Explanation: In most countries of the world the governments have placed trade barriers and rent control policies, this is clearly against the view and believe of Economists who believe that the market for rent should be controlled by market force like DEMAND AND SUPPLY. Trade barriers have been imposed by governments everywhere, this barriers are aimed at preventing the sale,trade,import or export of certain products which are clearly against the view of economics.

answer; i believe the correct answer is (4) flip a coin as each participant arrives,heads indicates assignment to the first group: tails indicates assignment to the second group;