Under conditions of perfect competition in the product market MRP = VMP. Under the assumption of perfect competition a firm employs a factor up to that number at which the price of the factor is just equal to the value of the marginal product (=MRP of the factor).
Which statistical measure helps in measuring the purchasing power of money?
Index numbers statistical measure helps in measuring the purchasing power of money. Index numbers possess much practical importance in measuring changes in the cost of living, production trends, trade, income variations, etc.
Fisher's Ideal volume index is the geometric mean of the Laspeyres and Paasche volume indices. A measure of change in volume from period to period. It is calculated as the geometric mean of a chain Paasche volume index and a chain Laspeyres volume index.
A floating exchange rate is one that is determined by supply and demand on the open market. A floating exchange rate doesn't mean countries don't try to intervene and manipulate their currency's price, since governments and central banks regularly attempt to keep their currency price favorable for international trade.
Arthur Cecil Pigou succeeded Prof. Marshall as the Professor of Economics at the University of Cambridge. After Marshall, he became the leading neo classical economist. He is the founder of “Welfare Economics” His leading ideas on welfare economics are found in his “Economics of Welfare” (1920).