(1997) offers that there are three form of valuation for unpaid work. Firstly, it can be measured by method of
opportunity cost as measuring the value of unpaid household work by measuring
how much a woman will earn if a woman works in the labor market instead of
doing household work. Secondly, the method of replacement cost as for example a
nanny takes care of the children instead of a household member how much spend
for the nanny. Lastly method of output and input cost as calculating what is
the use of these good and services in capital market.