
Claude-Frédéric Bastiat (1801 – 1850) was a French economist, writer and a prominent member of the French Liberal School. A member of the French National Assembly, Bastiat developed the economic concept of opportunity cost and introduced the parable of the broken window. He was described as “the most brilliant economic journalist who ever lived” by economic theorist Joseph Schumpeter. As an advocate of classical economics and the economics of Adam Smith, his views favored a free market and influenced the Austrian School. What is Seen and What is Not Seen In his 1850 essay "Ce qu'on voit et ce qu'on ne voit pas" ("What is seen and what is not seen"), Bastiat introduced through the parable of the broken window the concept of opportunity cost in all but name. This term was not coined until over sixty years after his death by Friedrich von Wieser in 1914. The translation brought was made by Patrick James Stirling (1809 - 1891) in 1850.