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The Effect of the Conservation Reserve Program on Rural Economies: Deriving a Statistical Verdict from a Null Finding

Author

Listed:
  • Brown, Jason P.
  • Wojan, Timothy R.
  • Lambert, Dayton M.

Abstract

This article suggests two methods for deriving a statistical verdict from a null finding,allowing economists to more confidently conclude when “not significant" can in fact be interpreted as “no substantive effect." The proposed methodology can be extended to a variety of empirical contexts where size and power matter. The example used to demonstrate the method is the Economic Research Service's 2004 Report to Congress that was charged with statistically identifying any unintended negative employment consequences of the Conservation Reserve Program (the Program). The report failed to identify a statistically significant negative long-term effect of the Program on employment growth, but the authors correctly cautioned that the verdict of “no negative employment effect" was only valid if the econometric test was statistically powerful. We replicate the 2004 analysis and use new methods of statistical inference to resolve the two critical deficiencies that preclude estimation of statistical power by economists: 1) positing a compelling effect size, and 2) providing an estimate of the variability of an unobserved alternative distribution using simulation methods. We conclude that the test used in the report had high power for detecting employment effects of -1 percent or lower resulting from the Program, equivalent to job losses reducing a conservative estimate of environmental benefits by a third.
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Suggested Citation

  • Brown, Jason P. & Wojan, Timothy R. & Lambert, Dayton M., 2017. "The Effect of the Conservation Reserve Program on Rural Economies: Deriving a Statistical Verdict from a Null Finding," 2017 Annual Meeting, July 30-August 1, Chicago, Illinois 258354, Agricultural and Applied Economics Association.
  • Handle: RePEc:ags:aaea17:258354
    DOI: 10.22004/ag.econ.258354
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    File URL: http://ageconsearch.umn.edu/record/258354/files/Abstracts_17_05_23_16_03_44_01__160_36_39_109_0.pdf
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    References listed on IDEAS

    as
    1. Deirdre N. McCloskey & Stephen T. Ziliak, 1996. "The Standard Error of Regressions," Journal of Economic Literature, American Economic Association, vol. 34(1), pages 97-114, March.
    2. Luther Tweeten, 1983. "Hypotheses Testing in Economic Science," American Journal of Agricultural Economics, Agricultural and Applied Economics Association, vol. 65(3), pages 548-552.
    3. Sullivan, Patrick & Hellerstein, Daniel & Hansen, LeRoy T. & Johansson, Robert C. & Koenig, Steven R. & Lubowski, Ruben N. & McBride, William D. & McGranahan, David A. & Roberts, Michael J. & Vogel, S, 2004. "The Conservation Reserve Program: Economic Implications for Rural America," Agricultural Economics Reports 33987, United States Department of Agriculture, Economic Research Service.
    4. Kevin Hoover & Mark Siegler, 2008. "Sound and fury: McCloskey and significance testing in economics," Journal of Economic Methodology, Taylor & Francis Journals, vol. 15(1), pages 1-37.
    5. Christensen, Ronald, 2005. "Testing Fisher, Neyman, Pearson, and Bayes," The American Statistician, American Statistical Association, vol. 59, pages 121-126, May.
    Full references (including those not matched with items on IDEAS)

    More about this item

    Keywords

    Resource/Energy Economics and Policy; Research Methods/Statistical Methods; Community/Rural/Urban Development;

    JEL classification:

    • C12 - Mathematical and Quantitative Methods - - Econometric and Statistical Methods and Methodology: General - - - Hypothesis Testing: General
    • Q42 - Agricultural and Natural Resource Economics; Environmental and Ecological Economics - - Energy - - - Alternative Energy Sources
    • R11 - Urban, Rural, Regional, Real Estate, and Transportation Economics - - General Regional Economics - - - Regional Economic Activity: Growth, Development, Environmental Issues, and Changes

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