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Matthew E. Kahn

Bloomberg Distinguished Professor of Economics and Business, Director of JHU's 21st Century Cities Initiative, 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) and Blue Skies over Beijing: Economic Growth and the Environment in China (joint with Siqi Zheng published by Princeton Press in 2016). He has also published three other Amazon Kindle books on urban economics and microeconomics. His research focuses on urban and environmental economics.

A new strategy for western states to adapt to long-term drought: Customized water pricing

Feb 14, 2023 13:08 pm UTC| Economy

Even after heavy snow and rainfall in January, western states still face an ongoing drought risk that is likely to grow worse thanks to climate change. A whopping snowpack is good news, but it doesnt reduce the need for...

Smart meters and dynamic pricing can help consumers use electricity when it's less costly, saving money and reducing pollution

Oct 19, 2022 08:49 am UTC| Technology

Americans want their electricity to be cheap, clean and reliable, but that trifecta is becoming more elusive, thanks to climate change. According to a 2021 report by the nonprofit research organization Climate Central,...

Climate Change Series

Why the cost of mitigating climate change can't be boiled down to one right number, despite some economists' best attempts

Feb 23, 2022 22:15 pm UTC| Economy Nature

Back in November 2019, before the pandemic began, would you have guessed how important videoconferencing like Zoom would be in peoples lives just a few months later? Thats the kind of challenge economists face when they...

Economy

Russian Stocks End Mixed as MOEX Index Closes Flat Amid Commodity Volatility

Russian stocks finished Saturdays trading session slightly lower overall, with the MOEX Russia Index closing flat at 0.00% in Moscow. Market performance was mixed, as gains in select heavyweight stocks were offset by...

China Industrial Profits Slump Signals Need for More Economic Stimulus

Profits at Chinas industrial firms fell sharply in November, marking the fastest year-on-year decline in more than a year and underscoring the fragile state of the countrys economic recovery. According to data released by...

Japan to Audit Brazil’s Beef System, Paving Way for Market Access

Japan is set to conduct a comprehensive audit of Brazils beef sanitary system in March 2026, marking a significant step toward the possible opening of Japans lucrative beef market to Brazilian beef exports. The...

Wall Street Ends Post-Christmas Session Flat as Investors Eye Santa Claus Rally

Wall Street finished a light-volume, post-Christmas trading session nearly unchanged on Friday, as investors found little fresh news to drive strong market conviction. After a solid five-session rally, all three major U.S....

Argentina Congress Approves 2026 Budget Under Milei, Marking First Legislative Passage Since 2023

Argentinas Congress has approved the countrys 2026 national budget, marking the first budget bill passed by legislators since President Javier Milei assumed office in late 2023. The budget was approved on Friday by a vote...

Politics

Zelenskiy and Trump Meet in Florida as Ukraine Peace Talks Face Major Hurdles

Ukrainian President Volodymyr Zelenskiy is set to meet U.S. President Donald Trump in Florida on Sunday in a high-stakes effort to advance a U.S.-brokered plan to end the war in Ukraine. The talks come amid intensified...

Kosovo Heads to Early Parliamentary Election Amid Prolonged Political Deadlock

Kosovo is set to hold a crucial parliamentary election on Sunday as Prime Minister Albin Kurti and his nationalist Vetevendosje party attempt to secure a governing majority and resolve a year-long political stalemate that...

Myanmar Election 2025 Faces Global Scrutiny Amid Civil War and Political Repression

Voters in Myanmar began casting ballots in a highly controversial general election on Sunday, marking the first nationwide polls since the military coup that overthrew the elected civilian government in 2021. The election,...

Bolsonaro Undergoes Phrenic Nerve Block Procedure After Surgery-Related Complications

Brazils former President Jair Bolsonaro underwent a phrenic nerve block procedure on Saturday as doctors worked to treat persistent hiccups that developed following recent surgery, according to statements from his wife,...

Canada Announces $2.5 Billion Economic Aid Package to Support Ukraine’s Financial Stability

Canadian Prime Minister Mark Carney announced on Saturday that Canada will provide an additional $2.5 billion in economic aid to Ukraine, reinforcing the countrys ongoing support amid the prolonged conflict with Russia....

Science

Jared Isaacman Confirmed as NASA Administrator, Becomes 15th Leader of U.S. Space Agency

The U.S. Senate has officially confirmed billionaire private astronaut Jared Isaacman as the new NASA administrator, making him the 15th leader in the agencys history. The confirmation, which took place on Wednesday, marks...

Senate Sets December 8 Vote on Trump’s NASA Nominee Jared Isaacman

The U.S. Senate Commerce Committee announced it will vote on December 8 on President Donald Trumps renewed nomination of private astronaut and tech entrepreneur Jared Isaacman to lead NASA. Isaacman, known for his...

NASA Cuts Boeing Starliner Missions as SpaceX Pulls Ahead

NASA has significantly scaled back Boeings Starliner program after years of technical issues and delays, announcing that the next Starliner mission to the International Space Station (ISS) will fly without astronauts. The...

Blue Origin’s New Glenn Achieves Breakthrough Success With First NASA Mission

Blue Origins massive New Glenn rocket marked a major milestone as it completed its first mission for paying customers, sending two NASA satellites toward Mars and successfully landing its reusable booster at sea. The...

Cogent Biosciences Soars 120% on Breakthrough Phase 3 Results for Bezuclastinib in GIST Treatment

Cogent Biosciences (NASDAQ: COGT) shares skyrocketed over 120% after the biotech company announced groundbreaking results from its Phase 3 PEAK trial evaluating bezuclastinib in combination with sunitinib for patients with...

Technology

China Proposes Stricter Rules for AI Services Offering Emotional Interaction

Chinas top internet regulator has released draft regulations aimed at tightening oversight of artificial intelligence services that simulate human personalities and engage users emotionally, signaling a stronger push to...

Nvidia and Groq Strike Strategic AI Inference Licensing Deal

Reports earlier this week suggested that Nvidia (NASDAQ: NVDA) had agreed to acquire AI chip startup Groq in a $20 billion all-cash transaction. However, updated details clarify that the arrangement is not a traditional...

TSMC Honors Japanese Chip Equipment Makers With 2025 Supplier Awards

Several leading Japanese semiconductor equipment manufacturers have been recognized with 2025 Supplier Awards from Taiwan Semiconductor Manufacturing Company (TSMC), highlighting their growing importance in the global chip...

Nvidia to Acquire Groq in $20 Billion Deal to Boost AI Chip Dominance

NVIDIA (NASDAQ: NVDA) has reportedly agreed to acquire Groq, a fast-growing designer of high-performance artificial intelligence accelerator chips, in a $20 billion all-cash transaction, according to a CNBC report. The...

Texas App Store Age Verification Law Blocked by Federal Judge in First Amendment Ruling

A federal judge in Texas has blocked the enforcement of a new state law that would have required app stores and developers to verify users ages, marking a significant legal win for major technology companies and digital...