"A man who did not do body labour had no right to eat" is based on the concept of 

The pillars of Periyar's Socio-economic philosophy are

Ambedkar's idea of state socialism is based on the philosophy of 

"The problem of the Rupee : Its origin and its solution" - was written by

Net National Product (NNP) is equal to

In recent years, the sector contributes more to the National Income of India