TESTING AGGREGATION CONSISTENCY ACROSS GEOGRAPHY AND COMMODITIES

Qinghua Liu and C. Shumway

No 22201, 2003 Annual meeting, July 27-30, Montreal, Canada from American Agricultural Economics Association (New Name 2008: Agricultural and Applied Economics Association)

Abstract: Consistent aggregation of production data across commodities and states was tested using Lewbel's generalized composite commodity theorem (GCCT). This was the first empirical GCCT test for consistent geographic aggregation and was applied to two groups of states. Consistent commodity aggregation was tested in all states for two output groups and three input groups and in one state for a larger number of groups. Using a more powerful test procedure than previously applied to production data, most tests for commodity aggregation gave ambiguous results. Consistent geographic aggregation was generally supported across Pacific Northwest states but was ambiguous across all Western states. Key words: Aggregation, commodity, geographic, composite commodity theorem, multiple-comparison tests.

Keywords: Research; Methods/Statistical; Methods (search for similar items in EconPapers)
Pages: 33
Date: 2003
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Journal Article: Testing aggregation consistency across geography and commodities (2004)
Journal Article: Testing aggregation consistency across geography and commodities (2004)
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Persistent link: https://EconPapers.repec.org/RePEc:ags:aaea03:22201

DOI: 10.22004/ag.econ.22201

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