Recommended citation for this document

Carrión i Silvestre, Josep Lluís ; Barrio Castro, Tomás del ; López-Bazo, Enrique. "Level shifts in a panel data based unit root test : an application to the rate of unemployment". Universitat de Barcelona. 2010. <http://hdl.handle.net/2445/11982>. [Consulta: 17-04-14].