Example image of eyePlorer eyePlorer map for 'On the Principles of Political Economy and Taxation': 1817 in literature Book David Ricardo Economics Land (economics) Absolute advantage Comparative advantage Free trade Adam Smith Anne Robert Jacques Turgot, Baron de Laune Jean-Baptiste Say John Stuart Mill Karl Marx Thomas Robert Malthus Wikipedia Ricardian economics Robert Torrens (economist) 1810s in sociology Cost-of-production theory of value Capitalism Marxian economics Principles of Political Economy (disambiguation) Trade List of important publications in economics Supply and demand