A crucial feature of early Keynesian business cycle theory is that real wages vary ________, which in fact ________ clearly emerge from U.S. data on wages over time

As more people in a developing country started using debit cards, banks installed more ATM machines, thereby benefitting all customers. This is an example of a(n) ________

A) network externality B) pecuniary externality C) adverse selection D) moral hazard

Economist Milton Friedman's theory of money demand is based on the supposition that money has a very ________ range of substitutes, giving monetary policy a ________ effect on aggregate demand

A) wide, strong B) wide, weak C) narrow, strong D) narrow, weak