This paper provides an empirical examination of the hypothesis that the forward exchange rate provides an "optimal" forecast of the future spot ex-change rate, for five currencies relative to the dollar. This hypothesis provides a convenient norm for examining the erratic behavior of exchange rates; this erratic behavior represents an efficient market that is quickly incorporating new information into the current exchange rate. This hypothesis is analyzed using two distinct, but related, approaches. The first approach is based on a regression of spot rates on lagged forward rates. When using weekly data and a one month forward exchange rate, ordinary least squares regression analysis of market efficiency is incorrect. Econometric methods are proposed which allow for consistent (though not fully efficient) estimation of the parameters and their standard errors. This paper also presents a new approach for testing exchange market efficiency. This approach is based on a general time series process generating the spot and forward exchange rate. The hypothesis of efficiency implies a set of cross-equation restrictions imposed on the parameters of the time series model. This paper derives these restrictions, proposes a maximum likelihood method of estimating the constrained likelihood function, estimates the model and tests the validity of the restrictions with a likelihood ration statistic

Originally published in 1986. This helpful text sets out what appears to make exchange rates change and shows how these various factors contribute to an explanation of the past. It considers the problems of providing satisfactory forecasts of the exchange rate while presenting the methods used, outlining their drawbacks and speculating on future ways forward. Laid out to move from empirical issues to theory and on to policy, this book is easily of use to those interested in macroeconomics, applied economics and international economics as well as economic history.

This book is based on an international conference organised by the Applied Econo metric Association (AEA) on International Macroeconomic Modelling which was held in Brussels at the Commission of the European Communities in December 1983. On behalf of the Applied Econometric Association, we would like to extend our thanks to all participants and contributors. This conference would not have been possible without the cooperation and support of the Commission of the European Economic Communities and of its Directorate General for Economics and Financial Affairs (DGII) staff, in particular M. Emerson, A. Dramais, and also H. Serbat of the Paris Chamber of Commerce and Industry. Our thanks go also to J.P. Ancot for his constructive comments concerning the structure of this book. We are grateful to M. Russo, R. Maldague and Y. Ullmo for opening the con ference with their stimulating review and comments on the use of international macroeconomic models; and to R. Bird, A.M. Costa, A. Crockett, H. Guitton, J.C. Milleron, J. Paelinck, J. Waelbroeck for chairing the scientific sessions. P. Artus F. Gagey O. Guvenen vi INTRODUCTION The main focus of this book is to present recent developments in the construction and use of international macroeconometric models. Four main aspects are selected: (i) analysis of trade linkages and exchange rate determination; (ii) modelling and simulating the international economy; (iii) international policy coordination; (iv) the use of international macroeconomic models.

The studies in this book deal with the determination of foreign exchange rates and the characteristics of the foreign exchange market. Analysis is made of flexible exchange rates through an approach developed by the authors, called the ‘asset-market approach’. Theory is combined with practical application in a clear concise way that will be understood by readers with a basic understanding of economics.