2011 study in American Economic Journal: Applied Economics on reduced auto pollution through electronic tolls and effects on fetal health outcomes.
2010 report from the Pew Center on the States on the challenges the country faces in providing high-speed Internet access to all Americans.
2010 study from the Transit Cooperative Research Program on recent streetcar systems and their impact on development and land-use patterns.
2008 U.C. Berkeley study looking at the effect of carpool lanes on the number of person and vehicle hours traveled.
2010 study by researchers from the University of Delaware and Stony Brook University on the potential of large-scale wind-farm networks.
2008 Brown University paper examining the extent to which highways could explain rates of suburbanization within the U.S.
2008 University of Missouri study exploring the potential for hydropower in reducing U.S. greenhouse gas emissions.
2008 paper by California State University examines the state's manufacturing job loss and explores possible solutions.
2008 paper by the Widener University School of Law on approaches for realizing the potential benefits of energy efficiency in the United States.
2007 meta-analysis by Amsterdam University of U.S. and international studies on transit stations' effect on property values.