M & H Economic Consultants, University of Southern California - Sol Price School of Public Policy, University of California, Davis - Department of Economics, Government of the United States of America - Department of Transportation, University of Toronto, University of Nebraska at Lincoln - Department of Economics, University of Idaho, Grand Valley State UniversityUniversity of Otago - School of Business - Department of Economics, Oregon State University - Department of Applied Economics, University of California, Berkeley, University of Utrecht, Government of the United States of America - Oak Ridge National Laboratory and University of South Florida - College of Business Administration