Banks and the stability of the international financial system

Summary Does today's banking scene pose a potential threat to the stability of the international financial system? The article discusses three possible sources of vulnerability of the international banking system: a major bank failure causing a general banking crisis via the extensive interbank linkages; the systemic risks allegedly inherent in certain new (as well as traditional) financial products; and the impact of external events such as debt crises, violent swings in exchange or interest rates, deregulation and recession. The author's conclusion is twofold: systemic risks clearly exist, but the probability of a major banking crisis tends to be greatly exaggerated. Banks not only survived the various crises of the seventies and eighties; they also learned in the process. Capital and reserves have been strengthened, provisions for country risk and for general contingencies have increased, supervision has been tightened and it is exercised on a comprehensive as well as a world-wide consolidated basis (i.e. including all contingent and off-balance liabilities, and all offshore activities). Assuming reasonably intelligent policies on the part of the monetary authorities and adequate international coordination, a general banking crisis can be avoided. Official rescue operations do, however, raise difficult questions of an ethical, political and economic nature.     

Reduced Form Auctions Revisited

This note uses the Theorem of the Alternative to prove new results on the implementability of general, asymmetric auctions, and to provide simpler proofs of known results for symmetric auctions. The tradeoff is that type spaces are taken to be finite.     

Foundations of Dominant-Strategy Mechanisms

Robert Wilson criticizes applied game theory's reliance on common-knowledge assumptions. In reaction to Wilson's critique, the recent literature of mechanism design has adopted the goal of finding detail-free mechanisms in order to eliminate this reliance. In practice this has meant restricting attention to simple mechanisms such as dominant-strategy mechanisms. However, there has been little theoretical foundation for this approach. In particular it is not clear the search for an optimal mechanism that does not rely on common-knowledge assumption would lead to simpler mechanisms rather than more complicated ones. This paper tries to fill the void. In the context of an expected revenue maximizing auctioneer, we investigate some foundations for using simple, dominant-strategy auctions.     

Robustness to the unavailability of data in block designs

We present general results for finding or boundingt _maxB , the maximum number of arbitrary whole blocks of observations which can be removed from a block design, and still leave all of the elementary treatment contrasts estimable. The block sizes may be larger than the number of treatments. The results are applied to BBDs, reinforced BIBDs and BBDs, BTIBDs, and a series of variance balanced incomplete block designs with two block sizes. Also given for most of these designs, are results fort _max, the maximum number of arbitrary, scattered observations that can become unavailable, and still leave all of the elementary treatment contrasts estimable.The work was undertaken while Dr. Whittinghill was visiting Ohio State University, and supported by a grant from the Natural Sciences Division, Colby College, Waterville, Maine.     

Aggregation effects on price and expenditure elasticities in a quadratic almost ideal demand system

Abstract.  While it is well known that demand elasticities calculated at the macro level will in general differ from those calculated at the micro level because of aggregation effects, there remain the questions of how large the effects are and how they vary with the degree of inequality in the income distribution. We explore these questions with models based on a quadratic version of the Almost Ideal Demand System. We investigate the elasticity differences theoretically and then calibrate the models and generate numerical results, using income data for seven countries with widely different distributions. The aggregation effects are found generally to be rather small, even with highly unequal income distributions.