Knowledge that Transforms

Few economists are aware of a wonderful problem. While climatologists claimed it first, the twists and turns make- the problem appear almost as if it were devised to show off the tools and controversies of microeconomics. Even more astounding is the fact that such an abstract, long-term problem excites the interest of the general public and media, and even politicians who desire more resources 1O be spent on research.

The cost of government regulation of the automobile has been the subject of heated controversy since its inception in the mid- 1960's. Much of this controversy has centered on the costs and benefits of individual regulations, but there has been little attention paid to the overall effect of emissions and safety regulation. In this paper, we attempt to measure the effect of these regulatory policies upon the consumer cost of owning and operating an automobile.

Explanations of inflation can be subdivided into two major groups. "Sociological theories" assert that movements of prices and wages proceed independently of market conditions. Economic theories on the other hand elaborate the essential dependence of price-wage movements on evolving market conditions. Sociological theories, dominant in Europe, emphasize the role of a wide array of institutional arrangements. In contrast, according to economic theory all forces and events affect inflation via market processes

Congress pursues externalities one at a time. The resulting legislation embodies the same sequential approach, instructing regulatory agencies to set and enforce standards for a single problem. Rarely, if ever, are agencies instructed or even permitted to account for contradictions with other federal legislation and rulemaking.

This paper studies how in utero exposure to maternal stress from family ruptures affects later mental health. We find that prenatal exposure to the death of a maternal relative increases take-up of ADHD medications during childhood and anti-anxiety and depression medications in adulthood. Further, family ruptures during pregnancy depress birth outcomes and raise the risk of perinatal complications necessitating hospitalization. Our results suggest large welfare gains from preventing fetal stress from family ruptures and possibly from economically induced stressors such as unemployment. They further suggest that greater stress exposure among the poor may partially explain the intergenerational persistence of poverty.

National policies take varied approaches to encouraging university- based innovation. This paper studies a natural experiment: the end of the “professor's privilege” in Norway, where university researchers previously enjoyed full rights to their innovations. Upon the reform, Norway moved toward the typical US model, where the university holds majority rights. Using comprehensive data on Norwegian workers, firms, and patents, we find a 50 percent decline in both entrepreneurship and patenting rates by university researchers after the reform. Quality measures for university start-ups and patents also decline. Applications to literature on university technology transfer, innovation incentives, and taxes and entrepreneurship are considered. (JEL I23, L26, M13, O31, O33, O34)

We develop a structural model to investigate the effects of pharmaceutical price regulation on demand and on manufacturers’ price-setting behavior in France. We estimate price-cost margins in a regulated market with price constraints and infer whether these constraints are binding, exploiting cost restrictions across drugs, which come from observing the same drugs in potentially price-constrained markets (France) and in markets where prices are unregulated (United States and Germany). Our counterfactual simulations suggest that price constraints generated modest savings for anti-ulcer drugs in 2003–2013 (2 percent of total expenses), relative to a free pricing scenario, and shifted consumption from generic to branded drugs. (JEL C51, D24, I18, L13, L51, L65)

The platform design, the process that helps potential buyers on the internet navigate toward products they may purchase, plays a critical role in reducing search frictions and determining market outcomes. We study a key trade-off associated with two important roles of efficient platform design: guiding consumers to their most desired product while also strengthening seller incentives to lower prices. We use simple theory to illustrate this, and then combine detailed browsing data from eBay and an equilibrium model of consumer search and price competition to quantitatively assess this trade-off in the particular context of a change in eBay's marketplace design. (JEL D12, D44, D83, L81, L86)

We study how the recent housing boom and bust affected college enrollment during the 2000s. We exploit cross-city variation in local housing booms, which improved labor market opportunities for young men and women. We find that the boom lowered college enrollment, with effects concentrated at two-year colleges. The decline in enrollment during the boom was generally reversed during the bust; however, attainment remains persistently low for particular cohorts, suggesting that reduced educational attainment is an enduring effect of the recent housing cycle. The housing boom can account for approximately 25 percent of the recent slowdown in college attainment. (JEL I23, I25, J24, J31, R21, R31)