Under the 2022 Inflation Reduction Act, the United States has for the first time implemented a methane emissions fee as a backstop to new methane regulations in the oil and gas sectors. The European Union is also implementing methane regulations on fossil energy. Methane is a short-lived but...

Two innovations in the last century have changed dramatically the cost of communicating and transmitting information: The first is the widespread adoption of telephony; the second is the internet. We study the implications of these changes in ICT for urban structure. We find robust evidence that...