We consider the problem of testing whether the observations X1, · · ·, Xn of a time series are independent with unspecified (possibly nonidentical) distributions symmetric about a common known median. Various bounds on the distributions of serial correlation coefficients are proposed:...

[eng] Nominal and Real Convergence in EC and EFTA countries This paper estimates the speed of convergence towards German values of nominal and real macroeconomic indicators of EC and EFTA countries for the last twenty years (for real GDP per capita we consider the period 1950- 1988). We use a...

[eng] The aim of this study is to test the joint hypothesis of rational expectations and market efficiency in commodity price determination. The test is based on the analysis of co-movements between commodity prices. It takes into account the specific dynamics of these series, especially the...

[eng] This paper analyses the causes of unemployment, in the long and in the short-run, in France and the United-States. Our empirical strategy consists of testing for short-run causality and for cointegration. The cointegration analysis seeks to establish whether there exists a common long-run...