Suppose that americans decide to increase their saving. as a result, the real interest rate will , and u. s. net capital outflow will . if the elasticity of u. s. net capital outflow with respect to the real interest rate is very low, this increase in private saving will have a effect on u. s. domestic investment. if the elasticity of u. s. exports with respect to the real exchange rate is very high, this increase in private saving will have a effect on the u. s. real exchange rate.