Economics- Macroeconomics , Demography , WP , demographics , dynamic stochastic general equilibrium models , macroeconomic interdependence , exchange rate , central bank , risk premium , trade balance , labor market , OLG household , nominal interest rate , market rate of interest , capital stock , GIMF model , rate of return , lending rate , Aging , Population growth , Demographic change , Global , consumption function , spillover effect , world real interest rate , net impact , substitution effect , wealth effect , fiscal policy question