We propose a model of business cycles for an economy that is characterized by involuntary unemployment and being dependent on energy imports. The presence of both factors increases aggregate volatility in a well-defined way: even in the absence of increasing returns to scale or high labor supply...

This paper entertains the notion that disturbances on the demand side play a central role in our understanding of the Great Depression. In fact, from Euler equation residuals we are able to identify a series of unusually large negative demand shocks that appeared to have hit the U. S. economy...

In this paper a two-sector growth model allowing indeterminacy to occur at relatively mild degrees of increasing returns is developed. It is shown that these economies of scale need only be present in one sector of the economy (investment). This feature of the model, therefore, builds on...