Supply-side economics

Supply-side economics is a school of macroeconomic thought which emphasizes the importance of tax cuts and business incentives in encouraging economic growth, in the belief that businesses and individuals will use their tax savings to create new businesses and expand old businesses, which in turn will increase productivity, employment, and general well-being. While all macroeconomics involves both supply and demand, supply-side economics emphasizes the importance of encouraging increases in supply. It was popularised in the 1970s by the ideas of Robert Mundell, Arthur Laffer, and Jude Wanniski. The term was coined by Wanniski in 1975.

Fiscal policy theory

Supply-side economics holds that increased taxation steadily reduces economic trade between economic participants within a nation and that it discourages investment. Taxes act as a type of trade barrier or tariff that causes economic participants to revert to less efficient means of satisfying their needs. As such higher taxation leads to lower levels of specialization and lower economic efficiency. The idea is said to be illustrated by the Laffer curve.

Related Topics:
Tariff - Laffer curve

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Crucial to the operation of supply-side theory is the expansion of free trade and free movement of capital. It is argued that free capital movement, in addition to the classical reasoning of comparative advantage, frequently allows an economic expansion. Lowering tax barriers to trade provides to the domestic economy all the advantages that the international economy gets from lower tariff barriers.

Related Topics:
Free trade - Comparative advantage

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Supply-side economists have less to say on the effects of deficits, and sometimes cite Robert Barros' work that states that rational economic actors will buy bonds in sufficient quantities to reduce long term interest rates. Critics argue that standard exchange rate theory would predict, instead, a devaluation of the currency of the nation running the high budget deficit, and eventual "crowding out" of private investment.

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According to Mundell "Fiscal discipline is a learned behavior." Or to put it another way, eventually the unfavorable effects of running persistent budget deficits will force governments to reduce spending in line with their levels of revenue. This view is also promoted by Victor Canto.

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The central issue at stake is the point of diminishing returns on liquidity in the investment sector: is there a point where additional money is "pushing on a string"? To the supply-side economist, reallocation away from consumption to private investment, and most especially from public investment to private investment, will always yield superior economic results. In standard monetarist and Keynesian theory, however, there will be a point where increases in asset prices will produce no new supply, that is where investment demand will outrun potential investment supply, and produce instead, asset inflation, or in common terms a bubble. The existence of this point, and where it is should it exist, is the essential question of the efficacy of supply-side economics.

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