This paper investigates the claim that the common finding of cointegration between spot and lagged forward exchange rates reflects the existence of covered interest arbitrage and not, as is generally accepted, long-run market efficiency. Breuer and Wohar's (1996) methodology is employed to match...

Various studies have investigated trends in commodity prices in the context of the Prebisch Singer Hypothesis. This paper applies new evidence on significance tests for trends in differenced and correlated stationary processes, to individual price series. <P>It is also investigated how well trends...</p>

Monthly data on the $US/ECU exchange rate are analysed in light of the random walk hypothesis. A battery of tests, including procedures that are robust to conditional heteroscedasticity, are applied against linear alternatives to departures from the random walk. These tests are all based on the...

This paper develops a methodology to estimate the environmental impact of the Uruguay Round trade agreement. The impact is estimated in terms of five air pollutants for both developed and developing countries/regions. The methodology estimates environmental Kuznets curves and uses these in...