"Market- Based Regulation of Agricultural Nonpoint Source Externalities" presented at the Conference entitled "Providing Environmental Services from Agriculture in a Budget-Constrained Environment" supported by USDA Economic Research Service, the Farm Foundation, and Resources for the Future, April 18, 2012, Washington DC.

"Markets and Regulation: Alternatives or Complements?" presented at the 2012 Agricultural Outlook Forum, sponsored by USDA, February 23, 2012, Washington DC

"The Potential for Agricultural Land Use Changes in the Raccoon River Basin to Reduce Flood Risk" presented at the University of Iowa Hydraulics Laboratory, December 2011, Iowa City Iowa.