These investments wouldn't have been made had there been no SEZ policy? Fact is, SEZs are just govt's way of getting around its own restrictive archaic laws and regulations, especially as related to land use and labor. SEZs per se are not crucially necessary - govt could just as well allow all greenfield projects, anywhere, the same sops as those of SEZs. SEZs were successful in China because China's economy and society was totally closed, so the Manadrins created SEZs as totally contained and controlled entities, seperated from the rest of the country - tiny entreports of capitalism in a sea of strictly controlled communism.