We argue that the U.S. personal saving rate’s long stability (from the 1960s through the early 1980s), subsequent steady decline (1980s - 2007), and recent substantial increase (2008 - 2011) can all be interpreted using a parsimonious ‘buffer stock’ model of optimal...

This paper sets up a simple AK-type growth model with heterogeneous consumption goods. It is shown that the (overall) intertemporal elasticity of substitution, the saving rate, and the growth rate of income unambiguously increase in the course of economic development. Moreover, the model offers...

This paper sets up a simple AK-type growth model with heterogeneous consumption goods. It is shown that the (overall) intertemporal elasticity of substitution, the saving rate, and the growth rate of income unambiguously increase in the course of economic development. Moreover, the model offers...