National Bureau of Economic Research

Finding empirical evidence on the productivity and competitive effects of firm mergers is a long-standing challenge. In Do Mergers and Acquisitions Improve Efficiency? Evidence from Power Plants (NBER Working Paper 32727), Mert Demirer and Ömer Karaduman find ownership changes for US electricity generators can increase efficiency by 2 to 5 percent, depending on the acquisition type. The efficiency increase begins...

In the Netherlands, there are striking socioeconomic differences in mortality among older adults, with a 4.4 percentage point (67 percent) higher five-year mortality rate for 70-year-old individuals with below-median income than for those with above-median income. To better understand the role of chronic disease in these health disparities, Kaveh Danesh, Jonathan T. Kolstad, William D. Parker, and Johannes Spinnewijn develop an index of chronic disease burden in The Chronic Disease Index: Analyzing Health Inequalities over the Lifecycle (NBER Working Paper 32577). This index is a measure...

Social Security Disability (SSD) program beneficiaries, like other consumers, have been negatively affected by inflation over the past several years. In a survey from June of 2023, more than half (59 percent) of SSD program beneficiaries reported higher prices for the disability-related goods and services they need to purchase, and more than one-quarter reported reducing food spending to cover disability-related costs, Zachary Morris and Stephanie Rennane found in Examining the Impact of Inflation on the Economic Security of Disability Program Beneficiaries (NBER RDRC Paper NB23-08).

Using new survey data, the researchers found that 82 percent of beneficiaries reported out-of-pocket expenses related to their disability, with average annual spending of $4,412 and median spending...

It is an honor to be here today; I owe my love of economics to the Bureau as well as my many friends and colleagues. Marty [Martin] Feldstein was one of the people who made it such a special place. I enjoyed seeing him around the Bureau, learning public finance from him, and briefly serving as his research assistant. I’d sit in his office, in awe of his incredible intellect and economic insights, and be completely distracted by the hilarious cartoons he had framed in his office. My favorite was the one in which Marty is depicted rowing in the wrong direction in a skiff while President Reagan yells “Feldstein!” They all reflected his steadfast willingness to speak his mind, to “speak truth to power,” even to the president of the United States...

Sociologists have argued that “third places” like cafés, which provide opportunities for individuals to socialize and exchange ideas outside of home and work, improve neighborhood life. But what about the relationship between such places and economic activity? In Third Places and Neighborhood Entrepreneurship: Evidence from Starbucks Cafés (NBER Working Paper 32604), researchers Jinkyong Choi, Jorge Guzman, and Mario L. Small use data on US business registrations between 1990 and 2022 from the Startup Cartography Project to examine whether the opening of a Starbucks in a neighborhood with no previous cafés affects local entrepreneurship...