In the Keynesian cross diagram, an increase in investment spending because companies become more optimistic about investment profitability causes the aggregate demand function to shift up, the equilibrium level of aggregate output to ________, and

The economic costs of forming a currency union will be lower whenever:

A) labor market integration is lower. B) labor market integration is higher. C) labor markets are not integrated. D) wage rigidities are present.

Cost minimization suggests that two inputs should be employed to the point where

A) the marginal cost of each input is identical. B) the marginal revenue product of each input is identical. C) the marginal physical product per dollar spent on each input is identical. D) the extra contribution to physical output of the inputs is identical.