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When Do "Nudges" Increase Welfare?

By Hunt Allcott, Daniel Cohen, William Morrison, and Dmitry Taubinsky

American Economic Review, May 2025

We use public finance sufficient statistic approaches to characterize the welfare effects of "nudges," such as simplified information and warning labels, in markets with taxes and endogenous prices. While many studies focus on average effects, we show tha...

Risk Aversion and Insurance Propensity

By Fabio Maccheroni, Massimo Marinacci, Ruodu Wang, and Qinyu Wu

American Economic Review, May 2025

We provide a new foundation of risk aversion by showing that this attitude is fully captured by the propensity to seize insurance opportunities. In our main results, we first characterize Arrow-Pratt (1963–1964) risk aversion in terms of propensity to f...

Selling Subscriptions

By Liran Einav, Ben Klopack, and Neale Mahoney

American Economic Review, May 2025

We study one benefit to firms of selling subscriptions: the prospect that consumers will continue to pay for subscriptions they no longer value. We use comprehensive data from a large payment card network to document that months during which cards are rep...

Patents, Innovation, and Competition in Pharmaceuticals: The Hatch-Waxman Act after 40 Years

[Symposium: Drug Pricing and Regulation]

By C. Scott Hemphill and Bhaven N. Sampat

Journal of Economic Perspectives, Spring 2025

A central policy issue in pharmaceuticals is how to balance the dynamic benefits of new drugs against the static benefits of low prices for existing drugs. In the United States, that balance is set by the Hatch-Waxman Act. We review the Act's origins and ...

The Economics of Generic Drug Shortages: The Limits of Competition

[Symposium: Drug Pricing and Regulation]

By Rena M. Conti and Marta E. Wosińska

Journal of Economic Perspectives, Spring 2025

We examine the economics of the US generic prescription drug market, which comprises the majority of medicines sold. The market is celebrated for its benefits in the form of high quality and low prices for consumers but is also increasingly challenged by ...

Measuring Income and Income Inequality

[Symposium: Income Inequality]

By Conor Clarke and Wojciech Kopczuk

Journal of Economic Perspectives, Spring 2025

Income inequality is important, but attempts to measure it arrive at strikingly different conclusions. Why? We use recent disputes over measuring United States income inequality to return to first principles about both the income concept and inequality me...

Macro Perspectives on Income Inequality

[Symposium: Income Inequality]

By Matthieu Gomez

Journal of Economic Perspectives, Spring 2025

Inequality has become a defining challenge for modern economies and a central focus of economic research over the past two decades. I begin by revisiting the foundations of income measurement, showing that standard definitions—taxable income, factor inc...