Example image of eyePlorer eyePlorer map for 'Economic surplus': Economics Factors of production Perfect competition Profit (economics) Opportunity cost Economic rent Land (economics) Scarcity Supply and demand Government Subsidy Tax Welfare economics Bargaining National accounts Operating surplus Profit (accounting) Heterodox economics Ruling class Marxian economics Surplus labour Surplus product Surplus value Price Reservation price Demand curve Integral Henry George Progress and Poverty Consumer surplus for software products Marshallian surplus Economic shortage Bureaucratic collectivism Two-part tariff Monopoly Capital Distortion (economics) Economic calculation problem Price skimming Surplus economics The Class Struggle in the Ancient Greek World Value of time Gains from trade Scarcity value Price support Compensating variation Welfare cost of business cycles Arnold Harberger Price fixing Foundations of Economic Analysis Import quota