William Hahn

William Hahn

Agricultural Economist
202-694-5175
whahn@ers.usda.gov

Briefly

Bill Hahn is an economist with the Animal Products Cost of Production Branch of the Market and Trade Economics Division. He has worked at ERS on livestock issues since 1986.

Education

B.S. in Agricultural Economics from The Ohio State University
M.S. in Agricultural Economics from North Carolina State University
Ph.D. in Agricultural Economics from The University of California, Davis.

Selected Publications

  1. “Cattle, Cutouts, and the Drop: How much information is in disaggregated cattle prices?” Selected paper for the Agricultural and Applied Economics Association 2017 Annual Meeting, July 30-August 1, 2017, Chicago, Illinois.
  2. Crespi, Shultz, Hahn, and Jones, “Assessing the Impacts of Global Shocks on United States Livestock Prices,” Selected paper for the Allied Social Sciences Association Meetings January 6, 2017, Chicago, Illinois.
  3. Davis and Hahn. “Assessing the Status of the Global Dairy Trade,” International Food and Agribusiness Management Review, Volume 19, Issue B, 2016, pp. 1-10.
  4. Hahn, Stewart, Blayney, and Davis. “Modeling Price Transmission between Farm and Retail Prices: A Soft Switches Approach,” Agricultural Economics, Volume 47 number 2, March 2016, pp. 193-203.
  5. Taha and Hahn. “Factors Driving South African Poultry and Meat Imports,” International Food and Agribusiness Management Review, Volume 18 Special Issue A, 2015, pp. 165-82.
  6. Taha and Hahn. “HPAI Impact on EU-27’s Import Demand for Cooked and Uncooked Poultry and Other Meats.” International Food and Agribusiness Management Review, Volume 18 Special Issue A, 2015, pp.223-44.
  7. Hahn, Stewart, Blayney, and Davis. “Farm to Retail Price Transmission: The case of Cheddar and Mozzarella Cheeses.” Selected paper for the Agricultural and Applied Economics Association 2015 Annual Meeting, July 26-28, 2015, San Francisco, CA.
  8. Brorsen, Fain, and Hahn. “Thin Market Issues in Livestock Markets.” Presentation at ERS Workshop: Price Discovery in Thin Markets, Washington DC, May 29, 2014.
  9. Hahn and Davis. "Costs of Taxing Sodium: A Lunch Meat Application." International Food and Agribusiness Management Review Volume 17 Special Issue A, 2014, pp. 25-39.
  10. Taha and Hahn. “The Impact of BSE on U.S. Exports of Beef and Pork,” Agribusiness Volume 30, number 1, Winter 2014, pp. 5-16.
  11. Davis, Dong, Hahn, Eales, and Yen. “Economic and demographic factors affecting US demand for lunch meats,” Food Economics Volume 9, Issue 4, page 231-40. Publication date on cover is 2012—actual publication October 25, 2013.
  12. Hahn, Taha, and Davis. “Estimating PIGLOG Demands Using Representative versus Average Expenditure.” Selected paper for the Agricultural and Applied Economics Association 2013 Annual Meeting, August 4-6, 2013, Washington, DC.
  13. Taha and Hahn. “Did the U.S BSE and EU27 HPAI Outbreaks Affect EU Meat Export Demand System?” Selected paper for the Agricultural and Applied Economics Association 2013 Annual Meeting, August 4-6, 2013, Washington, DC.
  14. Taha and Hahn, “The Impact of BSE on U.S. Exports of Beef and Pork.” Conference on Emerging Issues in Global Animal Product Trade Washington, DC, September 27-28 2012.
  15. Taha and Hahn, “Modeling South Africa’s Meat Import Demand System.” Agricultural & Applied Economics Association Annual Meetings, Seattle, WA, August 12-14, 2012.
  16. Taha and Hahn, “Avian Influenza Boosted Japan's Imports of Dried Egg Products,” Amber Waves, December 2011, p. 5.
  17. Taha, F.A., and W.F. Hahn, “Highly Pathogenic Avian Influenza Impacts on Japan’s Import Demand for Cooked and Uncooked Poultry, Beef, Pork, and Other Meats.” Selected Paper presented at the AAEA Meetings, Pittsburgh, PA., July 24-26, 2011, 26 pp.
  18. Hahn, “The relationship between US and Canadian Steer prices, Meats.” Paper presented at the AAEA Meetings, Pittsburgh, PA as part of an ERS-Organized Symposium, July 24-26, 2011.
  19. Davis, C., D. Dong, W. Hahn, D. Marti, and James Eales of Purdue University. Economic and Demographic Factors Affecting U.S. Demand for Lunch Meats, Using Scanner Data to Answer Food Policy Questions Conference June 1-2, 2011.
  20. Taha and Hahn, “Highly Pathogenic Avian Influenza Impacts on Japan’s Import Demand for Shell Eggs and Processed Egg-Products,.” World Poultry Science Journal, Volume 67, March 2011, pp. 115-30.
  1. Hahn, “Dynamic and Asymmetric Adjustment in Beef and Pork Prices.” Selected paper for AAEA summer meetings, Denver CO July 27, 2010. 
  2. Taha and Hahn, “Highly Pathogenic Avian Influenza Impacts on Japan’s Import Demand for Shell Eggs and Processed Egg-Products.” Selected paper for the 2010 Annual NAREA Conference, Atlantic City, NJ, June 13-15 2010. 
  3. Taha and Hahn. “Analysis of the Effects of EU-27 Avian Influenza Outbreak on Its Meat and Poultry Imports.” Paper accepted by the International Agricultural Trade Research Consortium Meetings in Fort Myers, FL, December 13-15, 2009.
  4. Jones, Harvey, Hahn, and Muhammad. "U.S. Demand for Source-Differentiated Shrimp: A Differential Approach," Journal of Agricultural and Applied Economics, August 2008, Vol. 40, No. 2, 2008, pp. 609-21.
  5. Davis, Stefanova, Hahn, and Chen. “Complements and Meat Demand in the S.” Selected Paper prepared for presentation at the American Agricultural Economics Association Annual Meeting, Orlando, Florida, July 27- 29, 2008.
  6. Muhammad, Jones, and Hahn. “The Impact of Domestic and Import Prices on U.S. Lamb Imports: A Production System Approach,” Agricultural and Resource Economics Review, October 2007, Volume 36, number 2, pp. 1-11. 
  7. Pritchett, Johnson, Thilmany, and Hahn. “Consumer Response to Recent BSE Events,” Journal of Food Distribution Research, July 2007, Volume 38, number 2, pp. 57-68.  The Food Distribution Research Society’s 2006-07 Presidential Award for Excellence in Research and Communication.
  8. Hahn and Mathews. “Characteristics and Hedonic Pricing of Differentiated Beef Demands,” Agricultural Economics, May 2007, Volume 36, pp. 377-93.
  9. Hahn, “Biosecurity, Diseases and Invasive Species: Implications of Bioterrorism for Agriculture: Discussion.” Journal of Agricultural and Applied Economics, August 2006, pp. 349-54.
  10. Salin, Hahn, and Somwaru. “Economic Evaluation of Non-Tariff Trade Barriers: Sanitary Regulations and the Broiler Market in the Western Hemisphere,” Journal of Economic Integration, March, 2005, pp. 158-84..
  11. Jones, Muhammad, and Hahn, “U.S. Demand for Imported Lamb by Country: A Two-Stage Differential Production Approach.” Presented at the Southern Agricultural Economics Association Annual Meeting, 14-18 February, 2004, Tulsa, Oklahoma.
  12. Hahn, Jones, and Davis. “Levels or Differences in Meat Demand Specification.” Presented at the American Agricultural Economics Association Summer Meetings, 22-30 July 2003, Montreal, Quebec, Canada. Paper can be found at AgEcon Search http://agecon.lib.umn.edu/
  13. Jones, Hahn, and Davis. “Demand for U.S. Lamb and Mutton: A Two-Stage Differential Approach.” Presented at the American Agricultural Economics Association Summer Meetings, 22-30 July 2003, Montreal, Quebec, Canada. Paper can be found at AgEcon Search http://agecon.lib.umn.edu/
  14. Salin and Hahn. “Changes in Sanitary Measures: Economic Impact on the North American Poultry Markets.” Presented at the American Agricultural Economics Association Summer Meetings, 22-30 July, 2003, Montreal, Quebec, Canada.
  15. Salin, Hahn, and Somwaru. Birds in a Coop: Looking at the Regional Broiler Market. GTAP Resource #1263, June 2003. 
  16. Hahn, “Round Trip Poultry Migration: Leaving Whole, Coming Back in Parts.” Presented at the American Agricultural Economics Association Summer Meetings, 28-31 July, 2002, Long Beach, CA.
  17. Hahn, “ERS Experience with the Retail Price Reporting Provisions of the Mandatory Livestock Price Reporting Act.” Presented at the American Agricultural Economics Association Summer Meetings, 5-8 August, 2001, Chicago, IL.
  18. Hahn, “Maximum Likelihood Estimation of a Random Coefficient Meat Demand System.” Presented at the American Agricultural Economics Association Summer Meetings, 5-8 August, 2001, Chicago, IL.
  19. “The Importance of Switching Regimes in Meat and Horticultural Products: Pork and Tomatoes.” Presented at the Conference “North American Integration and Its Impact on the Food and Fiber Center.” Washington, DC, November 6-7, 2000.
  20. Hahn and Green, “Joint Costs in Meat Retailing, Journal of Agricultural and Resource Economics Volume 25, Number 1, July 2000, pp. 109-27.
  21. Hahn, “Transportation and U.S. Beef Exports: Focusing on Japan.” Speech given at Technical Changes in the Transportation Sector‑‑ Effects on U.S. Food and Agricultural Trade, a conference sponsored by USDA, ERS, March 17‑18, 1999, Washington, DC.  Published in Coyle and Ballenger, editors, Technical Changes in the Transportation Sector‑‑ Effects on U.S. Food and Agricultural Trade: A Proceedings. Miscellaneous Publication 1566, USDA, Economic Research Service, Washington, DC, September 2000, pp. 47-50.
  22. "A Random Coefficient Meat Demand Model," Journal of Agricultural Economics Research, Volume 45, number 3, February, 1995, pages 21‑30.
  23. "Elasticities in AIDS Models: Comment," American Journal of Agricultural Economics, Volume 76, number 4, November 1994, pp. 972‑77.
  24. Huang and Hahn, "Foreign Trade Implications of the U.S. Demand for Beef." In Policy Implications for U.S. Agriculture of Changes in the Demand for Food, Jensen and Chalfant, editors.  CARD, Ames, Iowa, 1994 (proceedings of a conference held October, 1991.), pp. 209‑16.
  25. Hahn, Mathews, and Nelson. "Economic Aspects of Supply and Demand for Livestock Forage on Public Lands." Appendix G of Rangeland Reform '94: Draft Environmental Impact Statement,S. Department of the Interior, Bureau of Land Management and U.S. Department of Agriculture, Forest Service, Washington, DC, 1994.
  26. "Measuring the Economic Costs Arising from the Differential Adoption of Bio‑technologies in Animal Production." in Livestock Productivity Enhancers: An Economic Assessment, Martin Bent, editor. CAB International, Wallingford, UK, 1993, pp. 151‑59.
  27. "Meat Price Spreads are not Proof of Price Gouging," Reprinted in: Meat Business Magazine, Volume 55, number 2, February 1994, pp. 9, 14.
  28. Green and Hahn, "Correcting the Almost Ideal Demand System for Shifts in the Distribution of Income with Application to the Modeling of Meat Demand." Selected Paper for the Annual Meetings of the American Agricultural Economics Association, 4‑7 August ,1991, Manhattan, KS.  Abstract published in American Journal of Agricultural Economics, Volume 73, number 5, December 1991, p. 1546.
  29. "Price Transmission Asymmetry in Pork and Beef Markets," Journal of Agricultural Economics Research, Volume 42, number 4, Fall 1990, pp. 21‑30. Selected as best article in JAER for 1991.
  30. "The Effects of the Income Distribution on Meat Demand," Journal of Agricultural Economic Research, Volume 40, number 2, Spring 1988, pp. 19‑24.
  31. "Measuring the Effects of the Distribution of Income upon the Consumer Demand for Meats." Selected Paper for the Annual Meetings of the American Agricultural Economics Association, August, 1987, East Lansing, MI. Abstract published in American Journal of Agricultural Economics, Volume 69, number 5, December 1987, p. 1080.
  32. Hahn, Green, and Hassan. "Econometric Estimation of Dynamic Demand Systems," paper presented at The Institute for Management Science/Operations Research Society of America Joint National Meeting, May 1987, New Orleans.
  33. Stillman and Hahn. "Econometric Modeling of the Livestock Sector." Paper presented at the Eighteenth Annual Pittsburgh Modeling and Simulation Conference. Published in the Proceedings, Volume 18, part 1, April 1987, pages 1‑7.
  34. Green, Hahn, and Rocke. "Standard Errors for Elasticities: A comparison of Bootstrap and Asymptotic Standard Errors,” Journal of Business and Economic Statistics, Volume 5 number 1, January 1987, pp. 145‑50.
  35. Wohlgenant and Hahn. "Dynamic Adjustment in the Monthly Consumer Demand for Meats," American Journal of Agricultural Economics, Volume 64, number 3, August 1982, pp. 553‑557.