Lawrence R. Klein won the 1980 Nobel Memorial Prize in Economic Sciences for the creation of econometric models and their application to the analysis of economic fluctuations and economic policies.
Econometrics combines economic theory, mathematics, and statistical data. Klein built large-scale models designed to estimate how economies respond to changes in government policy, consumer spending, investment, and other factors.
His models were used for forecasting and policy analysis, especially after the Second World War. The award citation recognized both the models themselves and their practical application to real economic problems.
Klein’s prize is distinct from the 1989 award to Trygve Haavelmo, whose work established important foundations for econometric methods. Klein was the sole economics laureate in 1980 and later helped develop forecasting institutions and research programs.