The authors describe a model of general equilibrium with incomplete markets in which firms can innovate by issuing arbitrary, costly securities. When short sales are prohibited, firms behave competitively and equilibrium is efficient. When short sales are allowed, these classical properties may...

Competition policy in the banking sector is complicated by the necessity of maintaining financial stability. Greater competition may be good for (static) efficiency, but bad for financial stability. From the point of view of welfare economics, the relevant question is: what are the efficient...

We review some recent research that explores the relationship between asset-price volatility and financial fragility when markets and contracts are incomplete. (JEL: E5, G2) Copyright (c) 2005 The European Economic Association.

There is a wide variation in the structure of financial systems in different countries. We compare two idealized polar extremes. In one, which we refer to as the "German model," banks and other intermediaries predominate. In the other, which we refer to as the "U.S. model," financial markets...

Positive and negative asset price bubbles and their relationship to monetary policy are considered. Positive bubbles occur when there is an agency problem between banks and the people they lend money to because the banks cannot observe how the funds are invested. This causes a risk shifting...

How should new securities be designed? Traditional theories have little to say on this: the literature on capital structure and general equilibrium theories with incomplete markets take the securities firms issue as exogenous. This paper explicitly incorporates the transaction costs of issuing...

The returns of assets that are traded on financial markets are more volatile than the returns offered by intermediaries such as banks and insurance companies. This suggests that individual investors are exposed to more risk in countries which rely heavily on financial markets. In the absence of...

The returns of assets that are traded on financial markets are more volatile than the returns offered by intermediaries such as banks and insurance companies. This suggests that individual investors are exposed to more risk in countries which rely heavily on financial markets. In the absence of...