The General Theory of Employment, Interest and Money

The General Theory of Employment, Interest and Money
Name	The General Theory of Employment, Interest and Money
Author	John Maynard Keynes
Country	United Kingdom
Language	English
Subject	Macroeconomics
Publisher	Palgrave Macmillan
Pub date	1936
Pages	472
Isbn	978-0-230-00476-4

The General Theory of Employment, Interest and Money. Published in 1936 by the British economist John Maynard Keynes, this seminal work fundamentally challenged the prevailing classical economics of the era and laid the intellectual foundation for modern macroeconomics. Written during the depths of the Great Depression, it argued that economies could settle in a state of persistent, involuntary unemployment, a direct contradiction to Say's law and the self-correcting mechanisms posited by thinkers like Alfred Marshall and Arthur Cecil Pigou. Its revolutionary ideas on aggregate demand, fiscal policy, and the role of the state in managing the economic cycle would dominate economic theory and policy in the post-World War II period, influencing institutions like the International Monetary Fund and governments worldwide.

Background and publication

The book was written against the backdrop of the global catastrophe of the Great Depression, which saw mass unemployment in industrial nations like the United States and United Kingdom defy the predictions of established economic orthodoxy. Keynes, a member of the Bloomsbury Group and a former advisor to the British Treasury, had previously expressed heterodox views in works like A Treatise on Money. The final synthesis, developed through intense debate with colleagues such as Roy Harrod, Joan Robinson, and Richard Kahn at Cambridge University, was published by Palgrave Macmillan in February 1936. Its immediate reception was mixed, drawing fierce criticism from adherents of the London School of Economics like Friedrich Hayek, but it quickly galvanized a new generation of economists, later known as the Keynesian Revolution.

Core concepts and critique of classical economics

Keynes launched a direct assault on the core tenets of classical economics, which held that flexible wages and prices would automatically ensure full employment through the mechanisms described by Jean-Baptiste Say. He argued that this was a "special case" applicable only in conditions of full employment. Instead, he proposed a "general theory" where the economy's overall level of output and employment is determined by aggregate spending, not by the price of labor. He dismissed the relevance of microeconomic supply-and-demand analysis for labor in the aggregate, famously criticizing the ideas of Arthur Cecil Pigou and the neoclassical synthesis. This framework shifted the focus from individual markets to economy-wide phenomena like total income and expenditure.

The principle of effective demand

The cornerstone of Keynes's system is the principle of effective demand, which states that the level of employment in a capitalist economy is determined by the point where aggregate demand—the total spending on goods and services by households, businesses, and the government—equals aggregate supply. He argued that there is no automatic mechanism to guarantee that this equilibrium occurs at full employment. Instead, a deficiency in effective demand, driven by low investment and high savings, could lead to a stable "under-employment equilibrium." This directly challenged the Treasury view that government spending merely "crowded out" private investment, a debate central to policy during the Great Depression.

The theory of interest and liquidity preference

Keynes rejected the classical view that interest rates were determined by the supply of savings and the demand for investment, a theory associated with Knut Wicksell. Instead, he developed the theory of liquidity preference, where the interest rate is a monetary phenomenon, a reward for parting with liquidity (cash). The demand for money, or liquidity preference, is motivated by the transactions motive, the precautionary motive, and, crucially, the speculative motive based on expectations about future bond prices and interest rates set by institutions like the Bank of England. This made the interest rate volatile and subject to animal spirits, potentially destabilizing investment plans.

The multiplier and the role of investment

Building on work by his colleague Richard Kahn, Keynes introduced the concept of the investment multiplier. This principle holds that an initial injection of spending, particularly on capital goods by firms or infrastructure by the state, generates a larger final increase in national income and employment through successive rounds of consumption. Investment, driven by the volatile "animal spirits" of entrepreneurs and their expectations of future profit (the marginal efficiency of capital), is the unstable, dynamic component of aggregate demand. Therefore, fluctuations in private investment, not shifts in consumption, are the primary cause of the business cycle and economic instability.

Implications for economic policy

The policy implications were profound and radical for their time. Since economies could remain stuck in a depression, waiting for wages to fall or interest rates to adjust was both socially disastrous and economically ineffective. Keynes advocated for active government intervention, primarily through fiscal policy, to manage aggregate demand. During a slump, the state should run budget deficits to finance public works—such as those later seen in the New Deal—thereby boosting income and employment via the multiplier. This justified a permanent role for the state in macroeconomic stabilization, influencing the design of the Bretton Woods system and post-war policies in nations from the United States to France.

Category:1936 books Category:Macroeconomics Category:Keynesian economics