Wealth taxes can make capital markets more efficient when they are optimally combined with lower capital gains taxes, argue Sergio Ocampo, Guttorm Schjelderup, and Floris Zoutman in new research.

Anticompetitive behavior, such as consolidation, in the health-insurance industry has allowed a small group of insurers to dominate the market. One of the main drivers of this behavior is “adverse selection,” where individuals know more about how sick they are than insurance companies do. To mitigate the risk of paying out more claims than they can cover, insurers often raise their premiums. Kellogg’s Amanda Starc and her colleague argue that, to create a truly healthy health-insurance marketplace, regulators and policymakers need a framework for rethinking the complex interactions between adverse selection and regulatory guardrails.

News media circulates with warnings about speculative bubbles in artificial intelligence and cryptocurrency, but history shows that not all bubbles are bad for the economy, and some may even aid long-term growth. In new research, Jared Bernstein, Aneil Kovvali and Jeffery Y. Zhang distinguish between constructive and destructive bubbles and suggest how the government and financial institutions can limit the consequences of the latter.

In new research, Francisco E. Beneke Avila proposes a multifactor test to distinguish between the legitimate exercise of the right to lobbying and efforts to capture areas of public policy. He argues that the latter is an abuse of the firm’s political rights that can justify the intervention of EU competition authorities when corporate political activity leads to a lessening of competition. 

Shishene Jing argues that the fair use doctrine's central question—whether a use is sufficiently transformative to avoid licensing requirements—breaks down when applied to AI. Transformativeness worked as a test because transformative uses rarely competed financially with the originals. AI training severs that relationship, as it is both the most transformative use of copyrighted material and the use best equipped to displace their markets.

In new research, Benjamin Rosa finds that when states ban affirmative action, minority- and women-run businesses become smaller than other contractors and are less likely to enter the market, but are no more likely to close their businesses entirely.