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What was the key tool used by Klein in his research that changed economic forecasting?

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Answer

A computer was a key tool used by Klein in his research that changed economic forecasting. The use of a computer allowed for much more sophisticated models and analysis than had previously been possible. Klein's research helped to make economics a more quantitative and scientific field, and his work had a major impact on the development of macroeconomics.
Mastering Macro: The Legacy of Lawrence Klein

Mastering Macro: The Legacy of Lawrence Klein

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