Ayerbe, Conchita Garces and Gorriz, Carmen Galve Effects of encironmental regulations on the productivity of large companies: an empirical analysis of the Spanish case J7104 2001 - 2001 - 129-152 V. 5 Issue. 2 Subjects--Topical Terms: Management Subjects--Index Terms: Environmental regulation;Pollution abatement investment;Porter hypothesis;Productivity;