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Whimsical aggregation of temporal data, market identification, and fragile results

Author

Listed:
  • Steven C. Blank

    (Department of Agricultural Economics, University of California, Davis and Economics Department, South Dakota State University)

  • Brian H. Schmiesing

    (Department of Agricultural Economics, University of California, Davis and Economics Department, South Dakota State University)

Abstract

One of the most common problems faced by analysts of agribusiness markets is that available data are aggregated to a degree that obscures the underlying decision process. This article reminds analysts of the implications of temporal data aggregation for market identification and its effects on the robustness of empirical results. Also, three major commodity market price series are analyzed to demonstrate how aggregation can affect empirical results. Finally, guidelines are suggested for selecting the appropriate level of aggregation for empirical problems.

Suggested Citation

  • Steven C. Blank & Brian H. Schmiesing, 1990. "Whimsical aggregation of temporal data, market identification, and fragile results," Agribusiness, John Wiley & Sons, Ltd., vol. 6(1), pages 33-40.
    • Handle: RePEc:wly:agribz:v:6:y:1990:i:1:p:33-40
    DOI: 10.1002/1520-6297(199001)6:1<33::AID-AGR2720060104>3.0.CO;2-E
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    References listed on IDEAS

    as
    1. Uri, Noel D & Rifkin, Edward J, 1985. "Geographic Markets, Causality and Railroad Deregulation," The Review of Economics and Statistics, MIT Press, vol. 67(3), pages 422-428, August.
    2. Wei, William W. S., 1978. "The effect of temporal aggregation on parameter estimation in distributed lag model," Journal of Econometrics, Elsevier, vol. 8(2), pages 237-246, October.
    3. Zellner, Arnold & Montmarquette, Claude, 1971. "A Study of Some Aspects of Temporal Aggregation Problems in Econometric Analyses," The Review of Economics and Statistics, MIT Press, vol. 53(4), pages 335-342, November.
    4. Leamer, Edward E, 1983. "Let's Take the Con Out of Econometrics," American Economic Review, American Economic Association, vol. 73(1), pages 31-43, March.
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    Cited by:

    1. von Cramon-Taubadel, Stephan & Loy, Jens-Peter & Meyer, Jochen, 2006. "Data Aggregation and Vertical Price Transmission: An Experiment with German Food Prices," 2006 Annual Meeting, August 12-18, 2006, Queensland, Australia 25291, International Association of Agricultural Economists.
    2. Lyon, Charles C. & Thompson, Gary D., 1991. "Model Selection With Temporal And Spatial Aggregation: Alternative Marketing Margin Models," Staff Papers 13253, University of Minnesota, Department of Applied Economics.
    3. Stephan von Cramon-Taubadel & Jens-Peter Loy & Jochen Meyer, 2006. "The impact of cross-sectional data aggregation on the measurement of vertical price transmission: An experiment with German food prices," Agribusiness, John Wiley & Sons, Ltd., vol. 22(4), pages 505-522.
    4. Basitan, Chris T. & Carver, Robert D. & Menkhaus, Dale J., 1992. "The Market Efficiency of Feeder Cattle Futures After Cash Settlement," WAEA/ WFEA Conference Archive (1929-1995) 321382, Western Agricultural Economics Association.

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