Template-Type: ReDIF-Article 1.0 Author-Name: Manuel Martin Title: Texto Abstract: Classification-JEL: R1 Pages: 13-14 Volume: 01 Year: 1987 File-URL: http://www.revistaestudiosregionales.com/documentos/articulos/pdf941.pdf File-Format: Application/pdf Handle: RePEc:rer:articu:v:01:y:1987:p:13-14