a major change in our study of differing economic systems in the era of transition is a. the renewed importance placed on the polar extremes of plan and market. b. the renewed importance attached to mixed systems rather than polar extremes. c. a recognition of the limited importance of foreign trade in the study of different economic systems. d. none of the above. . the main reason why the overall distribution of family income may be more nearly equal under socialism is that a. socialism is always fairer than other systems. b. there are no returns to labor under socialism. c. earnings from capital and land accrue to society, not to individuals. d. all workers earn equal wages. Solution a major change in our study of differing economic systems in the era of transition is b. the renewed importance attached to mixed systems rather than polar extremes the main reason why the overall distribution of family income may be more nearly equal under socialism is that c. earnings from capital and land accrue to society, not to individuals. .