Input-output Model

In economics, an input-output model is a quantitative economic technique that represents the interdependencies between different branches of the national economy or between branches of different, even competing economies. Wassily Leontief (1906-1999) developed this type of analysis and took the Nobel Prize in Economics for his development of this model. Earlier Francois Quesnay developed a cruder version of this technique called Tableau économique. And, in essence, Léon Walras's work Elements of Pure Economics on general equilibrium theory is both a forerunner and generalization of Leontief's seminal concept. Leontief's main contribution was that he was able to simplify Walras's piece so that it could be implemented empirically.

The International Input-Output Association is dedicated to advancing knowledge in the field of input-output study, which includes "improvements in basic data, theoretical insights and modelling, and applications, both traditional and novel, of input-output techniques."