El objetivo del presente trabajo se centra en verificar el cumplimiento de la Ley de Precio Unico (LPU) en mercados separados espacialmente, utilizando el enfoque de cointegración. Se han considerado dos mercados: trigo y cebada, y cuatro zonas productoras-consumidoras de dichos cereales: Ebro,...

This paper examines the asymptotic and finite sample behaviour of the ADF and Phillips-Perron statistics under the presence of a break in the trend function. We prove that the break magnitude affects these two statistics in a similar way, drawing them closer the acceptance zone, the higher the...

This paper considers the behaviour of the Dickey-Fuller tests when the variable being studied is generated according to Perron's (1989) crash hypothesis. We show that these statistics tend towards the Dickey-Fuller distributions under the null hypothesis and diverge towards -[infinity] under the...

This paper analyses the evolution of pharmaceutical expenditure with respect to GDP for a group of the most important OECD economies. We find that this relationship is not stable across the sample considered (1960-2003), and heterogeneity is found in the temporal evolution of the variables and...

The aim of this article is to test the effects of human capital on Spanish internal migration, decomposed into two components: the size and the composition of the labour force. Our results indicate that those Spanish regions that experienced increases in the ratio of skilled to unskilled workers...