Since the writing of David Hume, in the eighteenth century, there has been a general agreement amogst economists that an increase in the stock of money leads, initially, to an increase in economic activity. Most writer have attributed the real effects of money, in the short run, to mistaken...

Most authors have attributed the real effects of money in the short run either to mistaken expectations or to non-market clearing or both. In this paper we argue that neither of these channels is needed to explain the facts. We show that a competitive market clearing model in which money enters...