According to piaget, during the formal operational stage people begin to:

Mankiw attributes – chapter 1 and his 10 principles – differences in living standards within a countryover time and across countries at a moment in time to: a. the presence or absence of inflation and unemployment.b. the allocation of resources between private markets and the public sector.c. those that have dealt successfully with the efficiency v. equality tradeoff and those that haven’t.d. differences in productivity.e. ones that think at the margin and respond to incentives and those that don’t.

How did ancient civilizations develope its agriculture and protect its population

Stie cineva cati ani poti fii director de sa imi specificati si legea va rog