What are the problems in the estimation of National Income?

There are number of problems that are faced while estimating national income such as

a) presence of non monetised sector- Sometimes a part of production escapes valuation ( due to self consumption) Thus NI is under estimated is that extent

b) Ignorance of Indian producer- Many a time the producers are ignorant about the exact value and quantity of their produce.

c) lack of differentiation of economic functions

d) non availability of reliable data

e) avoidance of financial burden