William Hahn

Agricultural Economist
202-694-5175
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 from The University of California, Davis.

Selected Publications

Mathews, K.H., B.W. Brorsen, W.F. Hahn, C. Arnade, and E. Dohlman. 2015. Mandatory Price Reporting, Market Efficiency, and Price Discovery in Livestock Markets, LDPM-254-01, U.S. Department of Agriculture, Economic Research Service, September.

Mathews, K.H., R.J. Johnson, and W.F. Hahn. 2011. Wholesale and Retail Price Changes in the Beef Sector, LDP-M-208, U.S. Department of Agriculture, Economic Research Service, October.

Hahn, W.F., J. Perry, and L. Southard. 2009. Comparing Two Sources of Retail Meat Price Data, ERR-88, U.S. Department of Agriculture, Economic Research Service, November.

Osteen, C., W.F. Hahn, E. Ashley. 2007. Program of Research on the Economics of Invasive Species Management: Fiscal 2003-2006 Activities, AP-021, U.S. Department of Agriculture, Economic Research Service, July.

Perry, J., J. MacDonald, K. Nelson, W.F. Hahn, C. Arnade, and G. Plato. 2005. Did the Mandatory Requirement Aid the Market?—Impact of the Livestock Mandatory Reporting Act, LDP-M-135-01, U.S. Department of Agriculture, Economic Research Service, September.

Hahn, W.F., M. Haley, D. Leuck, J. Miller, J. Perry, F. Taha, and S. Zahniser. 2005. Market Integration of the North American Animal Products Complex, LDPM-13101, U.S. Department of Agriculture, Economic Research Service, May.

Zahniser, S., C. Bolling, W. Chambers, K. Chan, W. Coyle, W.F. Hahn, M. Haley, L. Hoffman, D. Leuck, J. Miller, N. Suarez, F. Taha, and J. Wainio. 2005. NAFTA at 11: The Growing Integration of North American Agriculture, WRS-0502, U.S. Department of Agriculture, Economic Research Service, February.

Salin, D.L., W.F. Hahn, and A. Somwaru. 2005. “Economic Evaluation of Non-Tariff Trade Barriers: Sanitary Regulations and the Broiler Market in the Western Hemisphere,” Journal of Economic Integration 20(1):158-184.

Hahn, W.F. 2004. “Slow Price Adjustments Benefits Beef and Pork Producers,” Amber Waves, U.S. Department of Agriculture, Economic Research Service, September.

Hahn, W.F. 2004. Beef and Pork Values and Prices Spreads Explained, LDP-M-118-01, U.S. Department of Agriculture, Economic Research Service.

Muhammad, A., K.G. Jones, and W.F. Hahn. 2004. “U.S. Demand for Imported Lamb by Country: A Two Stage Differential Production Approach,” presented at the Southern Agricultural Economics Association Annual Meeting, February 14-18, Tulsa, OK.

Hahn, W.F., K.G. Jones, and C.G. Davis. 2003. “Levels or Differences in Meat Demand Specification,” presented at the American Agricultural Economics Association Summer Meetings, July 22-30, Montreal, Quebec, Canada.

Jones, K.G., W.F. Hahn, and C.G. Davis. 2003. “Demand for U.S. Lamb and Mutton: A Two Stage Differential Approach,” presented at the American Agricultural Economics Association Summer Meetings, July 22-30, Montreal, Quebec, Canada.

Salin, D.L., and W.F. Hahn. 2003. “Changes in Sanitary Measures: Economic Impact on the North American Poultry Markets,” presented at the American Agricultural Economics Association Summer Meetings, July 22-30, Montreal, Quebec, Canada.

Salin, D.L., W.F. Hahn, and A. Somwaru. 2003. “Birds in a Coop: Looking at the Regional Broiler Market,” GTAP Resource #1263, June.

Salin, D.L., W.F. Hahn, and D.J. Harvey. 2002. U.S.-Mexico Broiler Trade: A Bird’s-Eye View, LDP-M-102-01, U.S. Department of Agriculture, Economic Research Service, December.

Hahn, W.F. 2002. “Price Spreads and Marketing System Performance,” Agricultural Outlook, AGO-297, U.S. Department of Agriculture, Economic Research Service, December. 

Hahn, W.F., and K.E. Nelson. 2002. “Controversies in Livestock Pricing,” Agricultural Outlook, AGO-297, U.S. Department of Agriculture, Economic Research Service, December.

Hahn, W.F. 2002. “Round Trip Poultry Migration: Leaving Whole, Coming Back in Parts,” presented at the American Agricultural Economics Association Summer Meetings, July 28-31, Long Beach, CA.

Hahn, W.F. 2001. “ERS Experience with the Retail Price Reporting Provisions of the Mandatory Livestock Price Reporting Act,” presented at the American Agricultural Economics Association Summer Meetings, August 5-8, Chicago, IL.

Hahn, W.F. 2001. “Maximum Likelihood Estimation of a Random Coefficient Meat Demand System,” presented at the American Agricultural Economics Association Summer Meetings, August 5-8, Chicago, IL.

Hahn, W.F. 2000. “The Importance of Switching Regimes in Meat and Horticultural Products: Pork and Tomatoes,” presented at the North American Integration and Its Impact on the Food and Fiber Center conference, November 6-7, Washington, DC.

Hahn, W.F., and R.D. Green. 2000. “Joint Costs in Meat Retailing,” Journal of Agricultural and Resource Economics 25(1):109-127, July.

Mathews, K.H., W.F. Hahn, K.E. Nelson, L.A. Duewer, and R.A. Gustafson. 1999. U.S. Beef Industry: Cattle Cycles, Price Spreads, and Packer Concentration, TB-1874, U.S. Department of Agriculture, Economic Research Service, April.

Hahn, W.F. 1999. “Transportation and U.S. Beef Exports: Focusing on Japan,” presented at the Technical Changes in the Transportation Sector—Effects on U.S. Food and Agricultural Trade conference, U.S. Department of Agriculture, Economic Research Service, March 17-18, Washington, DC.

Hahn, W.F. 2000. Technical Changes in the Transportation Sector—Effects on U.S. Food and Agricultural Trade: A Proceedings, MP-1566, W.T. Coyle, and N. Ballenger, eds., pp. 47-50, U.S. Department of Agriculture, Economic Research Service, September.

Nelson, K.E., and W.F. Hahn. 1998. Concentration in the U.S. Beef Packing Industry, LDP-M-53, U.S. Department of Agriculture, Economic Research Service, August.

Hahn, W.F. 1998. Forecasting Farm-to-Retail Pork Price Spreads, LDP-M-52, U.S. Department of Agriculture, Economic Research Service, July.

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

Hahn, W.F. 1996. “An Annotated Bibliography of Recent Elasticity and Flexibility Estimates for Meat and Livestock,” Staff Paper No. AGES-9611, U.S. Department of Agriculture, Economic Research Service, July.

Hahn, W.F. 1996. “Livestock” in NAFTA: Year Two and Beyond, A Report by the NAFTA Economic Monitoring Task Force, pp. 17-21, NAFTA-5, U.S. Department of Agriculture, Economic Research Service, April.

Hahn, W.F. 1996. “Documentation for the Animal Product Branch’s Cost-Benefit Calculation Model for Red Meat and Poultry,” Staff Paper No. AGES-9606, U.S. Department of Agriculture, Economic Research Service, April.

Huang, K.S., and W.F. Hahn. 1995. U.S. Quarterly Demand for Meats, TB-1841, U.S. Department of Agriculture, Economic Research Service, February.

Hahn, W.F. 1995. "A Random Coefficient Meat Demand Model," Journal of Agricultural Economics Research 45(3):21-30, February.

Hahn, W.F. 1994. "Elasticities in AIDS Models: Comment," American Journal of Agricultural Economics 76(4):972-977, November.

Mathews, K.H., W.F. Hahn, K.E. Nelson, and T.L. Crawford. 1994. Cow/Calf Ranching in 10 Western States, AER-682, U.S. Department of Agriculture, Economic Research Service, May.

Huang, K.S., and W.F. Hahn. 1994. "Foreign Trade Implications of the U.S. Demand for Beef," in Policy Implications for U.S. Agriculture of Changes in the Demand for Food, H. Jensen, and J. Chalfant, eds., pp. 209-216. Ames, IA: CARD, Iowa State University (proceedings of a conference held October, 1991).

Hahn, W.F., K.H. Mathews, and K.E. Nelson. 1994. "Economic Aspects of Supply and Demand for Livestock Forage on Public Lands," Rangeland Reform '94: Draft Environmental Impact Statement, Appendix G, U.S. Department of the Interior, Bureau of Land Management and U.S. Department of Agriculture, Forest Service, Washington, DC.

Hansen, B., W.F. Hahn, and M. Wiemer. 1994. Determinants of the Farm-to-Retail Milk Price Spread, AIB-693, U.S. Department of Agriculture, Economic Research Service, March.

Hahn, W.F. 1994. "Meat Price Spreads are not Proof of Price Gouging," Meat Business Magazine 55(2):9 and 14, February.

Hahn, W.F. 1993. North American Trade Model for Animal Products, TB-1830, U.S. Department of Agriculture, Economic Research Service, December.

Hahn, W.F. 1993. "Measuring the Economic Costs Arising from the Differential Adoption of Bio-technologies in Animal Production," in Livestock Productivity Enhancers: An Economic Assessment, M. Bent, ed., pp. 151-159. Wallingford, UK: CAB International. 

Hahn, W.F., contributor. 1992. Agriculture in a North American Free Trade Agreement: Analysis of Liberalizing Trade Between the United States and Mexico, U.S. Department of Agriculture, Economic Research Service, June.

Hahn, W.F. 1991. "Meat Price Spreads are not Proof of Price Gouging," Food Review 14(4):14-17, U.S. Department of Agriculture, Economic Research Service, October-December.

Green, R.D., and W.F. Hahn. 1991. "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, August 4-7, Manhattan, KS. Abstract published in American Journal of Agricultural Economics 73(5):1546, December.

Hahn, W.F., and L.A. Duewer. 1991. "An Evaluation of Farm-to-Retail Price Spreads for Pork in 1990," Selected Paper for the Annual Meetings of the American Agricultural Economics Association, August 4-7, Manhattan, KS. Abstract published in American Journal of Agricultural Economics 73(5):1550, December.

Hahn, W.F. 1991. "Pork Price Spread Sets Record," Agricultural Outlook 174:11-12, U.S. Department of Agriculture, Economic Research Service, May.

Hahn, W.F. 1990. "Price Transmission Asymmetry in Pork and Beef Markets," Journal of Agricultural Economics Research 42(4):21-30, Fall. Selected as best article in JAER for 1991.

Hahn, W.F., T.L. Crawford, L. Bailey, and S. Shagam. 1990. “The World Beef Market—Government Intervention and Multilateral Policy Reform,” Staff Report AGES 9051, U.S. Department of Agriculture, Economic Research Service, August.

Hahn, W.F., and K.E. Nelson. 1990. "Demand for Beef: Has It Changed?" Agricultural Outlook 164:15-17, U.S. Department of Agriculture, Economic Research Service, June. 

Shagam, S., S. Mercier, W.F. Hahn, L. Christensen, and L. Witucki. 1990. "Liberalizing World Trade in Meats," Agricultural Outlook 164:30-35, U.S. Department of Agriculture, Economic Research Service, March.

Hahn, W.F. 1989. Asymmetry in Price Transmission for Beef and Pork, TB-1769, U.S. Department of Agriculture, Economic Research Service, December.

Hahn, W.F., T.L. Crawford, K.E. Nelson, and R.A. Bowe. 1989. “Estimating Forage Values for Grazing National Forest Lands,” Staff Report AGES 89-51, U.S. Department of Agriculture, Economic Research Service, October.

Aldrich, L., L. Bailey, T.L. Crawford, W.F. Hahn, and S. Shagam. 1988. "Changes in World Beef Trade," Agricultural Outlook 147:18-19, U.S. Department of Agriculture, Economic Research Service, November.

Hahn, W.F. 1988. "Asymmetric Dynamic Processes," paper presented at the Eighth International Symposium on Forecasting, June 12-15, Amsterdam, The Netherlands.

Hahn, W.F. 1988. "The Effects of the Income Distribution on Meat Demand," Journal of Agricultural Economic Research 40(2):19-24, Spring. 

Hahn, W.F. 1987. "Why is Beef Consumption Falling?" Agricultural Outlook 134:13-14, U.S. Department of Agriculture, Economic Research Service, September.

Hahn, W.F. 1987. "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, East Lansing, MI. Abstract published in American Journal of Agricultural Economics 69(5):1080, December.

Hahn, W.F., R.D. Green, and A. Hassan. 1987. "Econometric Estimation of Dynamic Demand Systems," paper presented at The Institute for Management Science/Operations Research Society of America Joint National Meeting, May, New Orleans, LA.

Stillman, R., and W.F. Hahn. 1987. "Econometric Modeling of the Livestock Sector," paper presented at the Eighteenth Annual Pittsburgh Modeling and Simulation Conference, published in the Proceedings, 18(1):1-7, April.

Green, R.D., D. Rocke, and W.F. Hahn. 1987. "Standard Errors for Elasticities: A Comparison of Bootstrap and Asymptotic Standard Errors," Journal of Business and Economic Statistics 5(1):145-150, January.

Wohlgenant, M.K., and W.F. Hahn. 1982. "Dynamic Adjustment in the Monthly Consumer Demand for Meats," American Journal of Agricultural Economics 64(3):553-557, August.