This paper presents an empirical study of real exchange rate movements from a consumer's perspective. Trade between two countries creates a link between real exchange rate and terms of trade. It is the private consumption of non-traded goods that induces an equilibrium relationship between real...

At each age an organism produces energy by foraging and allocates this energy among reproduction, survival, growth, and intergenerational transfers. We characterize the optimal set of allocation decisions that maximizes reproductive fitness. Time preference (the discount rate) is derived from...