The classical and early neoclassical economists knew that the essential function of money was its role as a medium of exchange; Recently, this idea has been formalized using search-theoretic noncooperative equilibrium models of the exchange process. The goal of this paper is to use a simple model...

The paper studies under what conditions the value of the firm occasionally increases for a while before it suddenly drops, like a "bubble". We consider the environment where the trend of net cash flow from a firm's production depends on uncertain quality of a manager, and the manager is...

Japan has seen episodes in which boom and bust in land prices is accompanied by boom and bust in business fixed investment. We develop a model that includes land in the production function. We show that in this model movements in land prices will be associated with movements of the capital stock...

A long standing issue in macroeconomics is that of the relation of imperfect competition to fluctuations in output. In this paper we examine the relation between monopolistic competition and the role of aggregate demand in the determination of output. We first show that monopolistically...

This paper is a theoretical study into how credit constraints interact with aggregate economic activity over the business cycle. We construct a model of a dynamic economy in which lenders cannot force borrowers to repay their debts unless the debts are secured. In such an economy, durable assets...

To analyze business fixed investment in Japan, which has been unusually volatile in recent years, we develop and apply a loglinear flexible accelerator model. We find that movements in business fixed investment are consistent with movements in output and the tax- adjusted cost of capital, both...

The paper presents a model of a monetary economy where there are differences in liquidity across assets. Money circulates because it is more liquid than other assets, not because it has any special function. There is a spectrum of returns on assets, reflecting their differences in liquidity. The...

We develop a variation of the macroeconomic model with banking in Gertler and Kiyotaki (2011) that allows for liquidity mismatch and bank runs as in Diamond and Dybvig (1983). As in Gertler and Kiyotaki, because bank net worth fluctuates with aggregate production, the spread between the expected...

This paper argues that the home, or nonmarket, sector is empirically large, whether measured in terms of the time devoted to household production activities or in terms of the value of home produced output. We also argue that there may be a good deal of substitutability between the market and...

We extend the concept of competitive search equilibrium to environments with private information, and in particular adverse selection. Principals (e.g. employers or agents who want to buy assets) post contracts, which we model as revelation mechanisms. Agents (e.g. workers, or asset holders)...