economics a-level ib gce questions multiplier market structure macroeconomic objectives macroeconomics public goods economies of scale lrac monopsony business objectives business phillips curve profit revenue subsidies oligopoly perfect competition positive externalities negative externalities market failure positive production externality negative production externality positive consumtion externality negative consumption externality positive externality negative externality supply-side subsidy profit maximisation unemployment inflation minimum efficient scale diseconomies of scale long-run average cost loss price ceiling price floor maximum prices minimum prices price controls elasticity monopolistic monopoly education
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