Q.Distinguish between Fisher's transactions approach and the Cambridge cash-balance approach to the Quantity Theory of Money.

Both approaches conclude that money and prices move together, but they look at money from opposite ends — spending versus holding.

Both approaches express the Quantity Theory of Money but from different standpoints.

Fisher's transactions (equation of exchange) approach: $MV = PT$. It views money as a medium of exchange and focuses on the total spending of money in transactions. Its key variable is the velocity of circulation $V$ — how fast money flows. It is essentially an accounting identity about the supply/flow of money.

Cambridge cash-balance approach: $M = kPY$. Developed by Marshall, Pigou, Keynes and Robertson, it views money also as a store of value and focuses on the demand for money — why people choose to hold a fraction $k$ of their real income $Y$ as cash. Its key variable is $k$, the cash-balance ratio.

Points of difference:

1. Emphasis: Fisher stresses the flow/spending of money (velocity V); Cambridge stresses the stock/holding of money (the fraction k).
2. Role of money: medium of exchange (Fisher) versus store of value as well (Cambridge).
3. Method: a supply-side identity (Fisher) versus a demand-for-money analysis (Cambridge). …

Students often present the two as contradictory theories. They are two formulations of the same theory; the correct emphasis is on their different viewpoints (spending vs …