MODEL CHOICE AND SPECIFICATION ANALYSIS

Chia sẻ: Nguyễn Nhi | Ngày: | Loại File: PDF | Số trang:46

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MODEL CHOICE AND SPECIFICATION ANALYSIS

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The data banks of the National Bureau of Economic Research contain time-series data on 2000 macroeconomic variables. Even if observations were available since the birth of Christ, the degrees of freedom in a model explaining gross national product in terms of all these variables would not turn positive for another two decades. If annual observations were restricted to the 30-year period from 1950 to 1979, the degrees of freedom deficit would be 1970.

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