Which of the following countries had the lowest level of output per capita in 1950?

The demand curve of a commodity slopes downward because of:

a. the insatiable nature of human wants. b. the presence of double coincidence of wants. c. the law of demand. d. the scarcity of goods and services in an economy. e. the law of diminishing marginal utility.

The share of the personal income tax paid by the bottom half of earners

a. rose to an all-time high in 2010. b. was substantially higher in 2010 than during the 1960s and 1970s. c. was substantially lower in 2010 than during the 1960s and 1970s. d. has been relatively constant during the last four decades.