Sarbapriya Ray Dr. Assistant Professor, Shyampur Siddheswari Mahavidyalaya,University of Calcutta,India   27/4 Chowdhury Para Second Bye Lane Howrah, West Bengal 711104 India   sarbapriyaray@yahoo.com             JEL Areas: L6 : Industry Studies: Manufacturing: General C1 : Econometric and Statistical Methods: General