Explain the cash balance theory of money.

Introduction:

The Cash Balance Theory of Money, also known as the Cambridge Cash Balance Approach, is an important theory in monetary economics that explains the determination of the value of money by emphasizing the demand for money rather than merely its supply. The theory was developed by the Cambridge School of economists, particularly Alfred Marshall, A. C. Pigou, Dennis Robertson, and later John Maynard Keynes during his early academic work at Cambridge.

Explanation:

The theory emerged as a criticism and improvement of the Classical Quantity Theory of Money propounded by Irving Fisher. Fisher’s theory stated that the value of money depends mainly on the quantity of money in circulation and the velocity of its circulation. According to him, an increase in the money supply would directly lead to a proportional increase in the price level, assuming other factors remained constant. However, the Cambridge economists argued that this explanation was incomplete because it ignored the behaviour of individuals regarding the amount of money they wished to hold.

The Cash Balance Theory emphasizes that people do not spend their entire income immediately. Instead, they retain a certain proportion of their income as cash balances to meet day-to-day expenses, unexpected emergencies, and future financial needs. Thus, money performs not only the function of a medium of exchange but also serves as a store of value.

According to the Cambridge economists, the value of money depends on the relationship between the supply of money and the public’s demand to hold cash balances. If people decide to hold a larger portion of their income as cash, the demand for money increases, reducing expenditure and lowering the general price level. Conversely, if people hold less cash and spend more, the demand for money decreases, increasing expenditure and raising the price level.

Definition

According to the Cash Balance Approach, the value of money depends on the amount of money people wish to hold in cash relative to their income.

According to Alfred Marshall, the value of money depends upon the demand for money to hold cash balances in relation to the supply of money.

A.c Pigou says people hold certain proportion of their income in the form of cash balances, and the value of money is determined by the relationship between these cash balances and the quantity of money.

Cambridge Equation

$M=kPY$M=kPY

Where:

• M = Total money supply
• k = Fraction of income people wish to hold as cash
• P = Price level
• Y = Real national income

Or,$$P = \frac{M}{kY}$$P=kYM​

This shows that the price level depends on the money supply, the proportion of income held as cash, and real income.

Main Assumptions

1. People hold a certain proportion of their income as cash.
2. The proportion (k) remains relatively stable.
3. Real income (Y) is constant in the short run.
4. The economy is at or near full employment.
5. Money is held for transaction and precautionary purposes.

Criticisms

• Assumes the cash-holding ratio (k) is constant, which is unrealistic.
• Ignores the role of interest rates in determining money demand.
• Does not fully explain changes in income and employment.
• Assumptions are often too restrictive for real-world economies.

Conclusion

The Cash Balance Approach states that the value of money depends not only on the quantity of money available but also on the amount of money people desire to hold as cash balances. Therefore, both the supply of money and the demand for money determine the price level and the value of money.

also read: explain the cash transaction theory of money.

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Haseena Banu

Haseena Bano is the Editor at Ecolaw.in, a dedicated platform providing comprehensive resources for BA LLB Economics courses. She also serves as a Professor of Economics at Al-Ameen College of Law, where she brings her academic expertise and passion for teaching to shape the next generation of legal professionals. With a deep understanding of both economics and law, she plays a pivotal role in bridging theoretical concepts with real-world applications.

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