Is the top tail of wealth a set of fixed individuals or is there substantial turnover? We estimate upper-tail wealth dynamics during the Gilded Age and beyond, a time of rapid wealth accumulation and ...

We do so using a synthetic difference-in-differences design that leverages variation from the 2022 Dobbs decision, which allowed states to ban abortion, and population flows based on change-of-address ...

How Do Researchers Become Affiliated Scholars? NBER affiliates are selected through a rigorous and competitive process that begins with a call for nominations each February. Program directors, with ...

Charging infrastructure is critical to electric vehicle (EV) adoption, but for chargers to be most useful, EV drivers need to know in real time where they are and whether they are working and ...

This paper explores past episodes of technological disruption in the US labor market, with the goal of learning lessons about the likely future impact of artificial intelligence (AI). We measure ...

This paper examines the role of domestic political economy forces in determining a government's ability to project geoeconomic power abroad. We also discuss the role that persuading or coercing ...

This paper provides an overview of recent empirical and methodological advances in the study of historical intergenerational mobility trends, with a focus on key measurement challenges. These advances ...

Cities are often described as engines of economic growth. We assess this statement quantitatively. We focus on two mechanisms: a static agglomeration effect that makes production in bigger cities more ...

We define risk transfer as the percent change in the market risk exposure for a group of investors over a given period. We estimate risk transfer using novel data on U.S. investors' portfolio holdings ...

Federal Early Intervention (EI) serves 426,000 children 0-3 with a disability, 3.7% of the entire population under three. EI’s objective is to support families in caring for their children’s special ...

Fertility levels have greatly decreased in virtually every nation in the world, but the timing of the decline has differed even among developed countries. In Europe, Asia, and North America, total ...

New research by NBER affiliates, circulated prior to peer review for discussion and comment. NBER Working Papers may not offer policy recommendations or normative judgments about policies, but may ...