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Flavors of Growth Theories. Neoclassical growth: diminishing returns to capital convergence Exogenous technology progress Solow growth residual Endogenous growth: Increasing returns to capital Setback permanent income gap Complementary investments
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Flavors of Growth Theories • Neoclassical growth: • diminishing returns to capital convergence • Exogenous technology progress • Solow growth residual • Endogenous growth: • Increasing returns to capital • Setback permanent income gap • Complementary investments • Human capital/infrastructure/R&D public role
New Growth Theory: Endogenous Growth • The Romer model: the knowledge embedded in K is a public good (5.1) (5.2) (5.3)
Coordination Failure and Multiple Equilibria: Chicken – Egg Problems/One – Time Fix
Coordination failures: some simple examples • Malthusian population trap: need child’s labor to survive • Network economies • Training workers/getting trained • Threshold mkt for middleman cash crops • Timing investment: wait and see • Initializing industrialization – who will buy? • Rosenstein-Rodan – Murphy, Shleifer, Vishny
Intervention: The Big Push Generate Sufficient Income to ModernizeWage W2 Multiple Equilibria (all modern, all traditional)
Need for BIG PUSH • Create sufficiently large market • Fixed costs reduce income and demand initially insufficient demand • Agglomeration (urbanization) & industrialization • Infrastructure effects • Training effects
Need for Big Push: Why no super-entrepreneur? • Capital market failures: Whom to trust? • Management: Principal – Agent Problem • Coordination of investment • Limited expertise: stick-to-knitting
Further Problems of Multiple Equilibria • Inefficient advantages of incumbency • Behavior and norms • Linkages • Inequality, multiple equilibria, and growth