__________ is a said to exist when the formation of a regional trading group leads to the reduction of trade with nonmember countries infavor of member countries.
A decrease in autonomous consumer expenditure causes the equilibrium level of aggregate output to __________ at any given interest rate and shifts the ___ curve to the __________
In the Keynesian cross diagram, an expenditure causes the aggregate demand function to shift _________ and the equilibrium level of aggregate output to.