Analysis of aggregation error in supply functions based on farm-programming models

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2017-06-26
Authors
Miller, Thomas
Heady, Earl
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Extension and Experiment Station Publications
It can be very challenging to locate information about individual ISU Extension publications via the library website. Quick Search will list the name of the series, but it will not list individual publications within each series. The Parks Library Reference Collection has a List of Current Series, Serial Publications (Series Publications of Agricultural Experiment Station and Cooperative Extension Service), published as of March 2004. It lists each publication from 1888-2004 (by title and publication number - and in some cases it will show an author name).
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Abstract

The over-all purpose of this study is to investigate problems of aggregation error in supply estimates. Specific elements of the analysis include an exploration of the theoretical aspects of developing error-free or minimum-error aggregates, the development of empirical supply estimates for Iowa pork and beef (based on different stratifications of representative farms), determination of the relative magnitude of the aggregation error and possible factors contributing to it, and recommending practical research procedures for controlling aggregation error.

The grouping implied by Theorem I developed in the study extends beyond the practice of grouping farms by restrictive resources. Although grouping by restrictive resources is important, it does not reflect differences in the response patterns of individual farms. The requirements of Theorem I provide a basic principle to follow in controlling aggregation error.

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