The cost of an extra unit of coal in Australia in terms of oil given up is

At a peak in the business cycle, the macroeconomic equilibrium is ________ the level of potential real GDP

A) greater than B) equal to C) less than D) falling below E) None of the above answers is always correct because the relationship depends on whether the previous phase of the business cycle had been a recession or an expansion.

Since the Social Security system began in 1935, the number of workers per retiree has

A) continually declined. B) stayed roughly the same. C) continually risen. D) risen and declined with different generations.