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The classical economists took the theory of the determinants of the level and growth of population as part of Political Economy. Since then, the theory of population has been seen as part of Demography. In contrast to the Classical theory, the following determinants of the neoclassical theory value are seen as exogenous to neoclassical economics:
Recall that the start of the Quantity theory's mechanism is a helicopter drop of cash: an exogenous increase in the supply of money. Wicksell's theory claims, indeed, that increases in the supply of money leads to rises in price levels, but the original increase is endogenous, created by the relative conditions of the financial and real sectors.
Keynes believed the classical theory was a "special case" that applied only to the particular conditions present in the 19th century, his theory being the general one. Classical economists had believed in Say's law, which, simply put, states that "supply creates its demand", and that in a free-market workers would always be willing to lower ...
A notable current within classical economics was underconsumption theory, as advanced by the Birmingham School and Thomas Robert Malthus in the early 19th century. These argued for government action to mitigate unemployment and economic downturns, and were an intellectual predecessor of what later became Keynesian economics in the 1930s.
Adam Smith. The classical school of economic thought emerged in Britain in the late 18th century. The classical political economists Adam Smith, David Ricardo, Jean-Baptiste Say and John Stuart Mill published analyses of the production, distribution and exchange of goods in a market that have since formed the basis of study for most contemporary economists.
Classical economists had difficulty explaining involuntary unemployment and recessions because they applied Say's law to the labor market and expected that all those willing to work at the prevailing wage would be employed. [29] In Keynes's model, employment and output are driven by aggregate demand, the sum of consumption and investment.
The revolution was primarily a change in mainstream economic views and in providing a unified framework – many of the ideas and policy prescriptions advocated by Keynes had ad hoc precursors in the underconsumptionist school of 19th-century economics, and some forms of government stimulus were practiced in 1930s United States without the intellectual framework of Keynesianism.
Economic liberalism opposes government intervention in the economy when it leads to inefficient outcomes. [14] They are supportive of a strong state that protects the right to property and enforces contracts. [2] They may also support government interventions to resolve market failures. [2]