The estimation of the memory parameter in perturbed long memory series has recently attracted attention motivated especially by the strong persistence of the volatility in many financial and economic time series and the use of Long Memory in Stochastic Volatility (LMSV) processes to model such a...

This article investigates economic convergence in terms of real income per capita between the autonomous regions of Spain over the period 1955–2020. In order to converge, the series should be cointegrated. This necessary condition is checked using two testing strategies recently proposed for...