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Biases in Farm-Level Yield Risk Analysis due to Data Aggregation

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  • Finger, Robert

Abstract

We investigate biases in farm-level yield risk analysis caused by data aggregation from the farm-level to regional and national levels using the example of Swiss wheat and barley yields. The estimated yield variability decreases significantly with increasing level of aggregation, with crop yield variability at the farm-level being up to 2.38 times higher than indicated from national data. Our results show furthermore that inference on shape parameters based on aggregated data might be misleading. Using an example of farm yield insurance, we show that using crop yield variability estimates from aggregated levels leads to erroneous insurance contract specifications. Dieser Beitrag untersucht unter Verwendung Schweizer Ertragsdaten für Weizen und Gerste potentielle Fehler, die bei der Analyse von Ertragsrisiken durch die Aggregation von Betriebsdaten auf regionalen oder nationalen Niveaus entstehen. Die geschätzte Ertragsvariabilität sinkt signifikant mit einem steigenden Aggregationsniveau, wobei die Ertragsvariabilität auf Betriebsebene bis zu 2,38-mal grösser seien kann, als dies durch nationale Daten angedeutet wird. Des Weiteren zeigen die Resultate, dass Rückschlüsse über Schiefe und Kurtosis der Erträge, basierend auf aggregierten Daten, irreführend sein können. Mittels eines Versicherungsbeispiels wird zudem gezeigt, dass die Ausgestaltung einer Versicherung, basierend auf aggregierten Daten, zu falschen Ergebnissen führen kann.

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  • Finger, Robert, 2012. "Biases in Farm-Level Yield Risk Analysis due to Data Aggregation," German Journal of Agricultural Economics, Humboldt-Universitaet zu Berlin, Department for Agricultural Economics, vol. 61(01), pages 1-14, February.
    • Handle: RePEc:ags:gjagec:199770
    DOI: 10.22004/ag.econ.199770
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    1. Ben Groom & Phoebe Koundouri & Celine Nauges & Alban Thomas, 2008. "The story of the moment: risk averse cypriot farmers respond to drought management," Applied Economics, Taylor & Francis Journals, vol. 40(3), pages 315-326.
    2. Oliver Musshoff & Martin Odening & Wei Xu, 2009. "Management of climate risks in agriculture-will weather derivatives permeate?," Applied Economics, Taylor & Francis Journals, vol. 43(9), pages 1067-1077.
    3. Bielza, Maria & Catenaro, Remo & Conte, Costanza G. & Gallego, Francisco J., 2008. "Regional Yield Insurance for Arable Crops in EU-27," 2008 International Congress, August 26-29, 2008, Ghent, Belgium 43690, European Association of Agricultural Economists.
    4. Onal, Hayri & McCarl, Bruce A, 1989. "Aggregation of Heterogeneous Firms in Mathematical Programming Models," European Review of Agricultural Economics, Oxford University Press and the European Agricultural and Applied Economics Publications Foundation, vol. 16(4), pages 499-513.
    5. Margot Rudstrom & Michael Popp & Patrick Manning & Edward Gbur, 2002. "Data Aggregation Issues for Crop Yield Risk Analysis," Canadian Journal of Agricultural Economics/Revue canadienne d'agroeconomie, Canadian Agricultural Economics Society/Societe canadienne d'agroeconomie, vol. 50(2), pages 185-200, July.
    6. Hennessy, David A., 2009. "Crop Yield Skewness and the Normal Distribution," Journal of Agricultural and Resource Economics, Western Agricultural Economics Association, vol. 34(1), pages 1-19, April.
    7. Debrah, Siegfried & Hall, Harry H., 1989. "Data aggregation and farm risk analysis," Agricultural Systems, Elsevier, vol. 31(3), pages 239-245.
    8. Michael Popp & Margot Rudstrom & Patrick Manning, 2005. "Spatial Yield Risk Across Region, Crop and Aggregation Method," Canadian Journal of Agricultural Economics/Revue canadienne d'agroeconomie, Canadian Agricultural Economics Society/Societe canadienne d'agroeconomie, vol. 53(2‐3), pages 103-115, June.
    9. Lips, Markus, 2009. "Full Product Costs on Base of Farm Accountancy Data by Means of Maximum Entropy," 2009 Conference, August 16-22, 2009, Beijing, China 51088, International Association of Agricultural Economists.
    10. Olivier Mahul, 2003. "Hedging price risk in the presence of crop yield and revenue insurance," European Review of Agricultural Economics, Oxford University Press and the European Agricultural and Applied Economics Publications Foundation, vol. 30(2), pages 217-239, June.
    11. Thomas O. Knight & Keith H. Coble & Barry K. Goodwin & Roderick M. Rejesus & Sangtaek Seo, 2010. "Developing Variable Unit-Structure Premium Rate Differentials in Crop Insurance," American Journal of Agricultural Economics, Agricultural and Applied Economics Association, vol. 92(1), pages 141-151.
    12. Finger, Robert, 2010. "Evidence of slowing yield growth - The example of Swiss cereal yields," Food Policy, Elsevier, vol. 35(2), pages 175-182, April.
    13. Steven D. Hanson & Robert J. Myers & J. Roy Black, 1998. "The Effects of Crop Yield Insurance Designs on Farmer Participation and Welfare," American Journal of Agricultural Economics, Agricultural and Applied Economics Association, vol. 80(4), pages 806-820.
    14. Coble, Keith H. & Dismukes, Robert & Thomas, Sarah E., 2007. "Policy Implications of Crop Yield and Revenue Variability at Differing Levels of Disaggregation," 2007 Annual Meeting, July 29-August 1, 2007, Portland, Oregon 9759, American Agricultural Economics Association (New Name 2008: Agricultural and Applied Economics Association).
    15. Daniele Simone Torriani & Pierluigi Calanca & Martin Beniston & Jürg Fuhrer, 2008. "Hedging with weather derivatives to cope with climate variability and change in grain maize production," Agricultural Finance Review, Emerald Group Publishing Limited, vol. 68(1), pages 67-81, May.
    16. Markus Lips & Robert Finger & Pierluigi Calanca, 2008. "Potenzielle Auswirkungen des Klimawandels auf Risiko und Kosten der Weizenernte," Journal of Socio-Economics in Agriculture (Until 2015: Yearbook of Socioeconomics in Agriculture), Swiss Society for Agricultural Economics and Rural Sociology, vol. 1(1), pages 219-323.
    17. Cooper, Joseph C. & Langemeier, Michael R. & Schnitkey, Gary D. & Zulauf, Carl R., 2009. "Constructing Farm Level Yield Densities from Aggregated Data: Analysis and Comparison of Approaches," 2009 Annual Meeting, July 26-28, 2009, Milwaukee, Wisconsin 49216, Agricultural and Applied Economics Association.
    18. Lobell, David B. & Ortiz-Monasterio, J. Ivan & Falcon, Walter P., 2007. "Yield uncertainty at the field scale evaluated with multi-year satellite data," Agricultural Systems, Elsevier, vol. 92(1-3), pages 76-90, January.
    19. Barry K. Goodwin, 2009. "Payment Limitations and Acreage Decisions under Risk Aversion: A Simulation Approach," American Journal of Agricultural Economics, Agricultural and Applied Economics Association, vol. 91(1), pages 19-41.
    20. Barnett, Barry J. & Black, J. Roy & Hu, Yingyao & Skees, Jerry R., 2005. "Is Area Yield Insurance Competitive with Farm Yield Insurance?," Journal of Agricultural and Resource Economics, Western Agricultural Economics Association, vol. 30(2), pages 1-17, August.
    21. Niklaus Lehmann, 2011. "Regional Crop Modeling: How Future Climate May Impact Crop Yields in Switzerland," Journal of Socio-Economics in Agriculture (Until 2015: Yearbook of Socioeconomics in Agriculture), Swiss Society for Agricultural Economics and Rural Sociology, vol. 4(1), pages 269-291.
    22. Hubert, M. & Vandervieren, E., 2008. "An adjusted boxplot for skewed distributions," Computational Statistics & Data Analysis, Elsevier, vol. 52(12), pages 5186-5201, August.
    23. Olivier Mahul, 2003. "Hedging price risk in the presence of crop yeld and revenue insurance," Post-Print hal-02680491, HAL.
    24. Hansen, J. W. & Jones, J. W., 2000. "Scaling-up crop models for climate variability applications," Agricultural Systems, Elsevier, vol. 65(1), pages 43-72, July.
    25. Bechtel, Amos I. & Young, Douglas L., 1999. "The Importance Of Using Farm Level Risk Estimates In Crp Enrollment Decisions," 1999 Annual Meeting, July 11-14, 1999, Fargo, ND 35717, Western Agricultural Economics Association.
    26. Marra, Michele C. & Schurle, Bryan W., 1994. "Kansas Wheat Yield Risk Measures And Aggregation: A Meta- Analysis Approach," Journal of Agricultural and Resource Economics, Western Agricultural Economics Association, vol. 19(1), pages 1-9, July.
    27. Bryan Schurle, 1996. "The Impact of Size on Yield Variability and Crop Insurance Premiums," Review of Agricultural Economics, Agricultural and Applied Economics Association, vol. 18(3), pages 415-422.
    28. L. M. Eisgruber & L. S. Schuman, 1963. "The Usefulness of Aggregated Data in the Analysis of Farm Income Variability and Resource Allocation," American Journal of Agricultural Economics, Agricultural and Applied Economics Association, vol. 45(3), pages 587-591.
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    2. Duden, C. & Offermann, F., 2019. "Farmers' risk exposition and its drivers," 171st Seminar, September 5-6, 2019, Zürich, Switzerland 333722, European Association of Agricultural Economists.
    3. Djanibekov, Utkur & Finger, Robert, 2015. "The effects of variability under farm land consolidation process: A perspective of cotton-growing farmers in Uzbekistan," 2015 Conference, August 9-14, 2015, Milan, Italy 211829, International Association of Agricultural Economists.
    4. Dörschner, T. & Mußhoff, O., 2014. "Does the Risk Attitude Influence and Farmers’ Willingness to Participate in Agri-Environmental Measures? – A Normative Approach to Evaluate Ecosystem Services," Proceedings “Schriften der Gesellschaft für Wirtschafts- und Sozialwissenschaften des Landbaues e.V.”, German Association of Agricultural Economists (GEWISOLA), vol. 49, March.
    5. ZGAJNAR, Jaka, 2016. "Simulation Model Based On Iacs Data; Alternative Approach To Analyse Sectoral Income Risk In Agriculture," Review of Agricultural and Applied Economics (RAAE), Faculty of Economics and Management, Slovak Agricultural University in Nitra, vol. 19(1), pages 1-9, April.
    6. Conradt, Sarah & Bokusheva, Raushan & Finger, Robert & Kussaiynov, Talgat, 2012. "Yield trend estimation in the presence of non-constant technological change and weather effects," 123rd Seminar, February 23-24, 2012, Dublin, Ireland 122541, European Association of Agricultural Economists.
    7. Schmitt, Jonas & Offermann, Frank & Söder, Mareike & Frühauf, Cathleen & Finger, Robert, 2022. "Extreme weather events cause significant crop yield losses at the farm level in German agriculture," Food Policy, Elsevier, vol. 112(C).
    8. Christopher N. Boyer & B. Wade Brorsen & Emmanuel Tumusiime, 2015. "Modeling skewness with the linear stochastic plateau model to determine optimal nitrogen rates," Agricultural Economics, International Association of Agricultural Economists, vol. 46(1), pages 1-10, January.
    9. Dörschner, Till & Musshoff, Oliver, 2013. "Does the risk attitude influence the farmers' willingness to participate in agri-environmental measures? – A normative approach to evaluate ecosystem services," 53rd Annual Conference, Berlin, Germany, September 25-27, 2013 156112, German Association of Agricultural Economists (GEWISOLA).
    10. Castañeda-Vera, Alba & Garrido, Alberto, 2017. "Evaluation of risk management tools for stabilising farm income under CAP 2014-2020," Economia Agraria y Recursos Naturales, Spanish Association of Agricultural Economists, vol. 17(01), June.
    11. Djanibekov, Utkur & Finger, Robert, 2018. "Agricultural risks and farm land consolidation process in transition countries: The case of cotton production in Uzbekistan," Agricultural Systems, Elsevier, vol. 164(C), pages 223-235.

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