Intro -- Contents -- Acknowledgments -- Introduction / Ajay Agrawal, Joshua Gans, and Avi Goldfarb -- I. AI as a GPT -- 1. Artificial Intelligence and the Modern Productivity Paradox: A Clash of Expectations and Statistics / Erik Brynjolfsson, Daniel Rock, and Chad Syverson, Comment: Rebecca...

Introduction / Ina Ganguli, Shulamit Kahn, and Megan MacGarvie --I. Location choices of international students and return migration.Return migrants' self-selection : evidence for Indian inventors /Stefano Breschi, Francesco Lissoni, and Ernest Miguelez --Will the U.S. keep the best and the...

"In advanced economies like the United States, innovation has long been recognized as a central force for increasing socioeconomic prosperity and improving human health. Today, U.S. government policy seeks to promote innovation through a suite of mechanisms, from tax credits in the private...

This paper proposes a framework to account for innovation similar to the usual accounting framework in production analysis and a measure of innovativity comparable to that of total factor productivity. This innovation accounting framework is illustrated using micro-aggregated firm data from the...

We show that, in a model without commitment to future policies, geoengineering breakthroughs can have adverse environmental and welfare effects because they change the (equilibrium) carbon taxes. In our model, energy producers emit carbon, which creates a negative environmental externality, and...

The relative popularity of adjustable-rate mortgages (ARMs) and fixed-rate mort- gages (FRMs) varies considerably both across countries and over time. We ask how movements in current and expected future interest rates affect the share of ARMs in total mortgage issuance. Using a nine-country...

I study the allocation of human capital in an economy with production externalities, financial constraints and career choices. Agents choose to become entrepreneurs, workers or financiers. Entrepreneurship has positive externalities, but innovators face borrowing constraints and require the...