“Currents and Currencies: Mojados Moving Against the Current,” Critical Encounters: Conversations in American Studies, Yale Working Group on Globalization and Culture, Yale University, April 24, 2015.
“Wetback: Coming to Terms with Mexico-U.S. River Crossings,” American Society for Ethnohistory Annual Meeting, New Orleans, September 11-14, 2013.
“Local Memories and Dreams on the Periphery of National Landscapes: Naco, Arizona and Naco, Sonora,” Arizona History Convention, Prescott, Arizona, April 23-26, 2009.
“‘El Dia de la Esperanza’ and Other Accounts of Progress in Naco,” Center for Latin American Studies Tinker Symposium, University of Arizona, October 30, 2008.
“‘If you like biodiversity, then you might like prairie dogs,’ and Other Reckonings about Restoration in the Borderlands,” with Katherine Morrissey and Neil Prendergast, University of Arizona, Department of History Brown Bag Series, September 2007.