This paper studies the asymptotic behaviour of the Dickey-Fuller family of tests when the variable being considered exhibits a break in the seasonal pattern. We show that the Dickey-Fuller test tends to reject the unit root null hypothesis, except when the break affects all the periods in a...

Evidence is provided on the PPP hypothesis using a sample of 50 Spanish cities for a long time period through the application of panel data unit root tests. Although results suggest non-rejection of the PPP, short-run deviations - as measured by half-lives - indicate that real factors might be...

Carrion-i-Silvestre J. L. and GERMAN-SOTO V. (2007) Stochastic convergence amongst Mexican states, Regional Studies 41, 531-541. The paper investigates the convergence process experienced by the Mexican states in the period 1940-2001. The analysis indicates that misleading conclusions can be...