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INTRODUCTION AND BACKGROUND
ALTERNATIVE ECONOMIC MODELS OF THE
MARKET DEFINITION AND INDUSTRY
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1962 amendments accounting rate advertising analysis argued argument assets Ayanian behavior capital Chapter chemical entities Comanor and Wilson's concentration ratios conclusion consumer decline demand curve depletion drug companies drug development drug firms drug industry drug innovation drug prices drug products dynamic economic economies of scale effect elasticity empirical entry barriers equation estimates evidence factors Grabowski growth rate Gusen hypothesis impact increase industry's investment issue Kefauver hearings lower prices marginal cost market power market share market structure measure monopoly NCEs oligopoly output patents Peltzman percent performance period pharmaceutical industry pharmaceutical manufacturers Prescription Drugs price changes price competition price index problem product differentiation product introductions profit rate promotional R&D expenditures rate of return reduced regulation regulatory relatively research opportunities returns to scale risk Schwartzman significant Stauffer studies submarkets substitution Telser testing theory therapy trend United Kingdom variable Vernon welfare