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actually affect allowable alternate artificially budget buyers capital cause Chapter Command Economy curve shifts decide decision define demand curve depending dollars Economics efficiency Elasticity of demand endogenous equilibrium Price example excess demand excess supply exogenous variable Expected price explain factors fall farmers firms force give given good/service Government Government imposes government intervention greater growth happens higher huge income increase industry inefficiency input labor land less lower means month move National Security Necessity normal opportunity cost percent period Population Price and Quantity price ceiling price changes price floor price goes probably problem produce Qd goes question resource allocation rice rise sell sensitive short run showing slope specific substitutability suppliers Supply and Demand supply curve talk Technology term thank there’s things thinking tickets tradeoff Tradition types