Furthermore, his "The Theory of Unemployment" (1933) explored how wage rigidity and deficient aggregate demand could lead to prolonged downturns. The Coase Theorem, articulated decades later, presented a radical challenge by suggesting that under ideal conditions—specifically the absence of transaction costs—private bargaining between parties could resolve externalities without government intervention.
Arthur Pigou's Macroeconomic Instability and the Roots of Unemployment
He identified two distinct types: those that create social costs and those that create social benefits. While often overshadowed by the charismatic brilliance of his Cambridge predecessor, Pigou dedicated his career to refining the classical model to account for real-world frictions and social costs.
Conversely, a beekeeper's bees pollinating a neighbor's orchard creates a positive externality. This mechanism remains a cornerstone of environmental and public health policy, providing a theoretical justification for carbon pricing and sin taxes.
Arthur Pigou's Macroeconomic Instability and the Roots of Unemployment
The Tool of Pigouvian Taxation To resolve this divergence, Pigou proposed a direct and elegant solution: the Pigouvian tax. His work on unemployment distinguished between "frictional" and "involuntary" varieties, offering an early theoretical explanation for why joblessness could persist even when workers were willing to accept lower wages.
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