THE LIQUIDITY TRAP, THE REAL BALANCE EFFECT, AND THE FRIEDMAN RULE*
研究零名义利率下经济行为与货币政策效果，使用含人口增长的模型，发现人口增长使货币政策产生分配效应，形成实际余额效应，从而消除流动性陷阱，但零利率可能使许多代理人境况恶化。
This article studies the behavior of the economy and the efficacy of monetary policy under zero nominal interest rates using a model with population growth that nests, as a special case, the conventional specification in which there is a single infinitely lived representative agent. The article shows that with a growing population, monetary policy has distributional consequences that give rise to a real balance effect, thereby eliminating the liquidity trap. These same distributional effects, however, can also work to make many agents much worse off under zero nominal interest rates than they are when the nominal interest rate is positive.