Professor Matthew E. Kahn

Johns Hopkins University

Matthew E. Kahn is the Bloomberg Distinguished Professor of Economics and Business at Johns Hopkins University and the Director of JHU's 21st Century Cities Initiative . He is a research associate at the National Bureau of Economic Research and a research fellow at IZA. He has taught at Columbia, the Fletcher School at Tufts University, UCLA and USC. He has served as a Visiting Professor at Harvard and Stanford and as the Low Tuck Kwong Distinguished Visiting Professor at the National University of Singapore. He is a graduate of Hamilton College and the London School of Economics. He holds a Ph.D. in Economics from the University of Chicago. He is the author of Green Cities: Urban Growth and the Environment (Brookings Institution Press 2006) and the co-author (joint with Dora L. Costa) of Heroes and Cowards: The Social Face of War (Princeton University Press 2009). He is also the author of Climatopolis (Basic Books 2010), Fundamentals of Environmental and Urban Economics (Amazon Kindle), and Blue Skies over Beijing: Economic Growth and the Environment in China (joint with Siqi Zheng published by Princeton Press). His research focuses on urban and environmental economics. He is married to Dora L. Costa. follow on Twitter at @mattkahn1966 and @JHU_Cities


My current Vita with web links to almost all of my publications.

My Google Scholar Page and my Google Citation Page and my REPEC Economics Rankings Page,

Links to old Published Papers and Working Papers

Educational Materials

On October 24th 2012, I started my own "environmental and urban economics university" called "Kahn University" on YouTube. These short educational videos are posted here.

Popular Media Coverage (out of date)

My YouTube Videos


I blog at My blog's entries focus on environmental and urban topics. Follow me on Twitter

My Seven Books and my Amazon Author Page

3. Climatopolis published in September 2010 by Basic Books. Here is the Book's overview.

Watch my UCSB Climatopolis Talk that 98,000 people have viewed here.

The Economist Magazine reviewed this book in its September 3rd 2010 issue .

4. Here is my Book titled Fundamentals of Environmental and Urban Economics. This book is priced at $1 per copy. When I teach undergraduate environmental economics, I use this as my textbook. For those who do not own a Kindle Reader, you can use this free app to read the book on your PC.

5. Blue Skies over Beijing: Economic Growth and the Environment in China (joint with Siqi Zheng) , Princeton University Press May 2016. You can read chapter one of this book if you click on the Princeton Press webpage.

An Introduction to Empirical Microeconomics by [Kahn, Matthew E.]

7. My Book on Price Theory Problems

This Amazon Book consists of many new applied micro questions to help young economists think about economic logic. The problems are not very challenging in terms of math content but they are meant to convey the power of price theory as a logical tool.


Before --- A Young Man in Fall 1988 (1st day of graduate school)

After --- A Middle Aged Man