Index Numbers of Quantity and Price
So far the valuation of national income and its components has been at current prices, at the factor cost or market prices of the year considered. The problem now to be tackled is to determine how much of a change in current value arises because of price movements and how much is a real or quantitative change. The question might be put: how much of a recorded change in consumers’ expenditure is due to inflation and what is the change in expenditure in real terms?
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