ABSTRACT The United States has experienced an unprecedented crisis related to the
misuse of and addiction to opioids. As of 2018, 128 Americans die each day of an opioid …

We review quasi-experimental studies that examine the relationship of opioids to health,
healthcare, and crime in the US Our findings align with the general perception that the …

We study the causes of “nutritional inequality”: why the wealthy eat more healthfully than the
poor in the United States. Exploiting supermarket entry and household moves to healthier …

Life expectancy varies substantially across local regions within a country, raising
conjectures that place of residence affects health. However, population sorting and other …

We review developments in research on within-country migration, focusing on internal
migration in the United States. We begin by describing approaches to modeling individuals' …

Intermittent monitoring of environmental standards may induce strategic changes in polluting
activities. This paper documents local strategic responses to a cyclical, once-every-six-day …

The twenty-first century has been a period of rising inequality in both income and health. In
this paper, we find that geographic inequality in mortality for midlife Americans increased by …

Medicare eligibility files provide the ZIP code of each beneficiary's mailing address, which is
maintained by the Social Security Administration (SSA). This is the address that is used to …

Competition in health insurance markets may fail to improve health outcomes if consumers
are not able to identify high-quality plans. We develop and apply a novel instrumental …

We use de-identified data from Facebook to study the social integration of Syrian migrants in
Germany, a country that received a large influx of refugees during the Syrian Civil War. We …