We are deeply indebted to our supervisor Prof. A.B.Rao, Centre for Technology Alternatives for Rural
Areas (CTARA) IIT Bombay, whose stimulating suggestions and encouragement helped us all the time of
study and writing of this paper. We have furthermore to thank Vijay Hanumant Honkalaskar (Ph.d
Student, CTARA) who helped us through methods to collect data. Our former colleagues from the IIT
Bombay supported us in this study. We want to thank them for all their help, support, interest and
valuable hints. We also want to thank all the people who gave their valuable contribution in conduction
the surveys.