To keep from running out of international reserves under the Bretton Woods system, a country had to implement ________ monetary policy to ________ its currency

If the cross-price elasticity of demand for a good is estimated at -3.9, estimate the percentage change in quantity demanded of the good when the price of the related good increases from $30 per unit to $75 per unit

Also, if it is known that the income elasticity of demand for the same good is 2.5, estimate the percentage change in demand if consumer income increases from $100 to $300.

If the marginal propensity to consume is 0.8, the marginal propensity to save is:

a. 0.8 b. 0.4 c. 0.2 d. 0.3