Matthew E. Kahn (IMAGE) University of Southern California Caption Matthew E. Kahn is an economic expert on climate change policy, energy efficiency and urban quality of life. Kahn is a Provost Professor of Economics and Spatial Sciences at the USC Dornsife College of Letters, Arts and Sciences. Credit Photo/USC Dornsife College of Letters, Arts and Sciences Usage Restrictions Credit must be given to creator. License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.