Children who are promised a payoff for playing with an interesting toy have later been observed to play with the toy less than those who are not promised the reward. these findings provide support for the role of in operant behavior.

How the environment of the northeast region affects the lifestyle of the people that live there

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.

An unsuccessful attempt at cooperation among the colonies was