The aim of this paper is to analyse, according to the new trade theories, the changes in the trade of Catalonia -a Spanish region- from the trade liberalisation due to the Spanish integration in the European Community. Concretely we examine if the changes in trade are predominantly of the...

This Phillips-Ouliaris (1988) non-parametric unit root test for non seasonal data and the seasonal one of Joyeux (1992) are based in the estimation of the spectral density function in a fixed frequency. We can get consistent estimations of the spectrum using spectral windows, but such procedure...

The lack of suitable critical values for the Dickey-Fuller integrability test in finite-samples can drive researchers to spurious conclusions when using asymptotic critical values. In this paper we estimate response surfaces for the Dickey-Fuller unit root test with structural breaks that allow...