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William Hahn

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

Briefly:

Bill Hahn is an economist with the Animal Products Branch. 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 frome The University of California, Davis

Selected Publications:

1. 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, forthcoming.

2. Hahn, Beef and Pork Values and Prices Spreads Explained forth-coming Electronic Outlook Report.

3. Jones, Muhammad, 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.

4. 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/

5. 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/

6. 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.

7. Salin, Hahn and Somwaru. Birds in a Coop: Looking at the Regional Broiler Market. GTAP Resource #1263, June 2003.

8. Salin, Hahn, and Harvey. U.S.-Mexico Broiler Trade: A Bird’s-Eye View. Electronic Outlook Report LDP-M-102-01, United States Department of Agriculture Economic Research Service, Washington, DC, December, 2002.

9. Hahn, “Price Spreads & Marketing System Performance.” Agricultural Outlook. Number AGO-297. December 2002. Page 17.

10. Hahn and Nelson, “Controversies in Livestock Pricing.” Agricultural Outlook. Number AGO-297. December 2002. Pages 16-19.

11. 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, California.

12. 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, Illinois.

13. 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, Illinois.

14. Hahn “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.

15. Hahn and Green, “Joint Costs in Meat Retailing. Journal of Agricultural and Resource Economics, Volume 25, Number 1, July 2000, pages 109-127.

16. Mathews, Hahn, Nelson, Duewer, and Gustafson, U.S. Beef Industry: Cattle Cycles, Price Spreads, and Packer Concentration, Technical Bulletin Number 1874, United States Department of Agriculture Economic Research Service, Washington, DC, April 1999.

17. 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, pages 47-50.

18. Nelson and Hahn, “Concentration in the U.S. Beef Packing Industry.” Livestock, Dairy and Poultry Situation and Outlook, volume LDP-M-53, August 17, 1998.

19. Hahn, “Forecasting Farm-to-Retail Pork Price Spreads.” Livestock, Dairy and Poultry Situation and Outlook, volume LDP-M-52, July 16, 1998.

20. Hahn, “Explaining Retail Meat Demand by using Hedonic Pricing and 2SLS Methods.” Agricultural and Resource Economics Guest Seminar, University of California, Davis, May 22, 1998.

21. Hahn. “An Annotated Bibliography of Recent Elasticity and Flexibility Estimates for Meat and Livestock.” Staff Paper No. AGES-9611, United States Department of Agriculture Economic Research Service, Washington, DC, July, 1996.

22. Hahn. “Livestock” a chapter in NAFTA: Year Two and Beyond, A Report by the NAFTA Economic Monitoring Task Force, NAFTA-5, United States Department of Agriculture Economic Research Service, Washington, DC, April, 1996, pages 17-21.

23. Hahn. “Documentation for the Animal Product Branch’s Cost-Benefit Calculation Model for Red Meat and Poultry.” Staff Paper Number AGES-9606, United States Department of Agriculture Economic Research Service, Washington, DC, April, 1996.

24. Huang and Hahn. U.S. Quarterly Demand for Meats, Technical Bulletin No. 1841, United States Department of Agriculture Economic Research Service, Washington, DC, February, 1995.

25. Hahn. "A Random Coefficient Meat Demand Model," Journal of Agricultural Economics Research, volume 45, number 3, February, 1995, pages 21-30.

26. Hahn. "Elasticities in AIDS Models: Comment," American Journal of Agricultural Economics, volume 76, number 4, November, 1994, pages 972-977.

27. Mathews, Hahn, Nelson, and Crawford. Cow/Calf Ranching in 10 Western States, Agricultural Economic Report No. 682 United States Department of Agriculture Economic Research Service, Washington, DC, May, 1994.

28. 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.) pages 209-216.

29. 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, U.S. Department of the Interior, Bureau of Land Management and U.S. Department of Agriculture, Forest Service, Washington, DC, 1994.

30. Hansen, Hahn, and Wiemer. Determinants of the Farm-to-Retail Milk Price Spread, Agricultural Information Bulletin No. 693 United States Department of Agriculture Economic Research Service, Washington, DC, March, 1994.

31. Hahn. North American Trade Model for Animal Products, Technical Bulletin No. 1830, United States Department of Agriculture Economic Research Service, Washington, DC, December 1993.

32. Hahn. "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, pages 151-159.

33. Contributor to: Agriculture in a North American Free Trade Agreement: Analysis of Liberalizing Trade Between the United States and Mexico, U.S. Department of Agriculture, Washington, DC, June 1992.

34. Hahn. "Meat Price Spreads are not Proof of Price Gouging," Food Review, volume 14, number 4, October-December 1991, pages 14-17.

35. Hahn. "Meat Price Spreads are not Proof of Price Gouging," Re-printed in: Meat Business Magazine, volume 55, number 2, February 1994, pages 9, 14.

36. 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, page 1546.

37. Hahn and Duewer, "An Evaluation of Farm to Retail Price Spreads for Pork in 1990." 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, page 1550.

38. Hahn. "Pork Price Spread Sets Record." Agricultural Outlook, volume 174, May 1991, pages 11-12.

39. Hahn. "Price Transmission Asymmetry in Pork and Beef Markets", Journal of Agricultural Economics Research, volume 42, number 4, Fall 1990, pages 21-30. Selected as best article in JAER for 1991.

40. Hahn, Crawford, Bailey, and Shagam. The World Beef Market--Government Intervention and Multilateral Policy Reform, ERS Staff Report AGES 9051, United States Department of Agriculture Economic Research Service, Washington, DC, August 1990

41. Hahn and Nelson. "Demand for Beef: Has It Changed?" Agricultural Outlook, volume 164, June 1990, pages 15-17.

42. Shagam, Mercier, Hahn, Christensen, Witucki. "Liberalizing World Trade in Meats." Agricultural Outlook, volume 164, March 1990, pages 30-35.

43. Hahn. Asymmetry in Price Transmission for Beef and Pork, Technical Bulletin No. 1769, United States Department of Agriculture Economic Research Service, Washington, DC, December 1989.

44. Hahn, Crawford, Nelson and Bowe. Estimating Forage Values for Grazing National Forest Lands, ERS Staff Report AGES 89-51, United States Department of Agriculture Economic Research Service, Washington, DC, October 1989.

45. Aldrich, Bailey, Crawford, Hahn, and Shagam. "Changes in World Beef Trade," Agricultural Outlook, volume 147, November 1988, pages 18-19.

46. Hahn. "Asymmetric Dynamic Processes", a paper presented at The Eighth International Symposium on Forecasting, June 12 through June 15, 1988. Amsterdam, The Netherlands.

47. Hahn. "The Effects of the Income Distribution on Meat Demand," Journal of Agricultural Economic Research, volume 40, number 2, Spring 1988, pages 19-24.

48. Hahn. "Why is Beef Consumption Falling?" Agricultural Outlook, September 1987, pages 13-14.

49. Hahn. "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, page 1080.

50. 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.

51. 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.

52. Green, Rocke, and Hahn. "Standard Errors for Elasticities: A comparison of Bootstrap and Asymptotic Standard Errors." Journal of Business and Economic Statistics, volume 5 number 1, January 1987, pages 145-150.

53. Wohlgenant and Hahn. "Dynamic Adjustment in the Monthly Consumer Demand for Meats." American Journal of Agricultural Economics, volume 64, number 3, August 1982, pages 553-557.

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