It might be helpful to tell readers that the collapse of the housing industry has lead to a $450 billion falloff in the pace of annual residential construction, the loss of $8 trillion in housing wealth will reduce annual consumption by around $450 billion, with the loss of $8 trillion in stock wealth leading to a further decline in annual consumption of $250 billion. In addition, the collapse of the non-residential real estate bubble will likely reduce annual demand by another $200 billion. This gives us a total decline in annual demand of around $1350 billion or $2,700 billion over two years. Next to a demand loss of $2,700 billion, an $825 billion stimulus package seems rather small.

We explore the dynamic effects of news about a future technology improvement which turns out ex post to be overoptimistic. We find that it is difficult to generate a boom-bust cycle (a period in which stock prices, consumption, investment and employment all rise and then crash) in response to such a news shock, in a standard real business cycle model. However, a monetized version of the model which stresses sticky wages and a Taylorrule based monetary policy naturally generates a welfare-reducing boom-bust cycle in response to a news shock. We explore the possibility that integrating credit growth into monetary policy may result in improved performance.