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book (4)


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English (4)


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1974 (4)

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Book
The Variances of Regression Coefficient Estimates Using Aggregate Data
Authors: --- ---
Year: 1974 Publisher: Cambridge, Mass. National Bureau of Economic Research

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Abstract

This paper considers the effect of aggregation on the variance of parameter estimates for a linear regression model with random coefficients and an additive error term. Aggregate and microvariances are compared and measures of relative efficiency are introduced. Necessary conditions for efficient aggregation procedures are obtained from the Theil aggregation weights and from measures of synchronization related to the work of Grunfeld and Griliches.


Book
Varying-Parameter Supply Functions and the Sources of Economic Distress in American Agriculture, 1866-1914
Authors: --- ---
Year: 1974 Publisher: Cambridge, Mass. National Bureau of Economic Research

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Abstract

The agrarian unrest in the United States at the end of the nineteenth century is examined. This unrest is often viewed as stemming from the inability of farmers to adapt to changing conditions in world agriculture. This hypothesis is tested in the context of a distributed lag supply function. Varying parameter estimation methods are used to trace the history of the parameters in the supply function and to decompose observed prices into permanent and transitory components over time. The patterns of variation are tested for conformity with a model of rational price-expectation formation. The conclusion is that farmers behaved as economic theory would predict, but that neither theory nor practice gave them relief from the troubles which plagued them.

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