The connection between obtaining higher paying jobs and undertaking some seemingly irrelevant activity is interpreted as “social culture.” In the context of a society trying to adopt a new technology, I show that by allowing the firms to give preferential treatment to workers based on some “cultural activity,” the society can partially overcome an informational free-riding problem. Therefore, social culture may affect the economic performance by altering the effective production technology of the economy. (JEL P17, Z13)

We present and empirically implement an equilibrium labor market search model where risk-averse workers facing medical expenditure shocks are matched with firms making health insurance coverage decisions. We use our estimated model to evaluate the equilibrium impact of many health care reform proposals, including the 2010 Affordable Care Act (ACA). We use the estimates of the early impact of the ACA as a model validation. We find that income-based subsidies for health insurance premiums are crucial for the sustainability of the ACA, while the ACA can still substantially reduce the uninsured rate without the individual or the employer mandate.

Understanding the nature and sources of human identity is an important objective in the study of a variety of social problems. Scholarly and popular writing on the cultural determinants of economic disadvantage underscores this point. Some analysts (e.g., Edward Banfield, 1970; Thomas Sowell, 1994; John McWhorter, 2000; John Ogbu, 2003) have hypothesized that a causal connection exists between the poor social performance of a group of people and their “culture.” That disadvantaged people harbor “dysfunctional” notions about identity has been offered as an explanation of a group’s welfare dependency, or its low academic proficiency. It has been said, for instance, that people fare poorly because they focus overly much on their own victimization, or because they disassociate themselves from their more successful fellows, and so on. At the root of such cultural criticism lies the presumption that the disadvantaged should “reform” themselves: If those people would only see themselves differently, the critics hint, they could be so much better off. This mode of social explanation easily accommodates racial overtones. With the present paper we intend to raise serious doubts about such normative criticisms of the poor when applied to their conceptions of identity. We show that the identities adopted by a group of people can be perfectly consistent with rational individual choices, even though feasible alternative configurations may exist under which everyone would be better off. Indeed, we argue that identity choice by interactive agents with ongoing economic relations has a “tragedy of the commons” quality about it: the profile of dominant strategies for the agents can yield a Pareto-inferior collective outcome. Preaching “identity reform” to such people is a bit like trying to counter an overfishing problem by lecturing fishermen on the moral need for forbearance! We wish to be explicit and clear at the outset about what we have in mind when using the term “identity.” Human identity includes both a personal and a social aspect. Social identity deals with how an individual is perceived and categorized by others (e.g., Erving Goffman, 1963). In contrast, personal identity, which is the subject of this paper, and which psychologists sometimes call “ego identity,” deals with a person’s answer to the question: “Who am I?” Our proposed model of personal identity posits that, to answer this question, an agent must provide a “narrative” about her personal history. That is, she has to summarize her life experiences. Because a full personal history is (necessarily) a very complex object, and since their cognitive capacities are limited, answering the “Who Am I?” question requires agents to project elaborate personal accounts onto manageable categories of self-description. We think of an agent’s identity as the mechanism she uses to convert complex personal history into a more simplified account of herself. A group’s “collective identity” is any self-representational mode of this sort which has been adopted in common by (most of) the agents in that group. We formalize the problem of selective selfrepresentation and use the resulting framework to study the efficiency implications of the “identity” choices people make. This, we believe, is one way that economic analysis can contribute to the study of identity-related issues.

Matsumoto (2020) pointed out data and coding errors in Fang and Gong (2017). We show that these errors have limited impacts: all qualitative findings remain after correcting them. Matsumoto also discussed potential service overcounting in the aggregated utilization data we used to illustrate our method, and then quantified the extent of overcounting with a sample of Medicare claims. We acknowledge the issue but discuss the noise and the bias in his quantification. Overall, our proposed method remains useful, as regulators who are interested in applying the method are unlikely to be subject to the data limitations. (JEL H51, I13, I18, J22, J44)

We investigate the effects of the institutional settings of the US health care system on individuals' life-cycle medical expenditures. Health is a form of general human capital; labor turnover and labor-market frictions prevent an employer-employee pair from capturing the entire surplus from investment in an employee’s health. Thus, the pair underinvests in health during working years, thereby increasing medical expenditures during retirement. We provide empirical evidence consistent with the comparative statics predictions of our model using the Medical Expenditure Panel Survey (MEPS) and the Health and Retirement Study (HRS). Our estimates suggest significant inefficiencies in health investment in the United States.

We propose a simple model of trooper behavior to design empirical tests for whether troopers of different races are monolithic in their search behavior, and whether they exhibit relative racial prejudice in motor vehicle searches. Our test of relative racial prejudice provides a partial solution to the well-known inframarginality and omitted-variables problems associated with outcome tests. When applied to a unique dataset from Florida, our tests soundly reject the hypothesis that troopers of different races are monolithic in their search behavior, but the tests fail to reject the hypothesis that troopers of different races do not exhibit relative racial prejudice.

We report results from a randomized natural field experiment conducted in a restaurant dining setting to distinguish the observational learning effect from the saliency effect. We find that, when customers are given ranking information of the five most popular dishes, the demand for those dishes increases by 13 to 20 percent. We do not find a significant saliency effect. We also find modest evidence that the observational learning effects are stronger among infrequent customers, and that dining satisfaction is increased when customers are presented with the information of the top five dishes, but not when presented with only names of some sample dishes. (JEL C93, D83).

We report results from a large, randomized field to study how access to formal microinsurance affects production and economic development. We induce exogenous variation in insurance coverage at the village level by randomly assigning performance incentives to the village animal husbandry worker who is responsible for signing farmers up for the insurance. We find that promoting greater adoption of insurance significantly increases farmers' sow production, and this effect seems to persist in the longer run; moreover, the increase in sow production in response to the sow insurance does not seem to be the result of the substitution of other livestock.

Abstract The entry of High-Speed Railways (HSR) represents disruptive competition to airlines. Utilizing a unique dataset of all flights departing from Beijing to 113 domestic destinations in China since January 2009, we employ a difference-in-differences approach to examine the effects of HSR entry on on-time performance and to identify the channels. We document two main findings. First, the entry of HSR leads to significant reductions in the mean and variance of travel delays on the affected airline routes. Second, the reductions in departure delays and taxi-in times at the destination airports are identified as the main channels.

We provide evidence of advantageous selection in the Medigap insurance market and analyze its sources. Conditional on controls for Medigap prices, those with Medigap spend, on average, $4,000 less on medical care than those without. But if we condition on health, those with Medigap spend $2,000 more. The sources of this advantageous selection include income, education, longevity expectations, and financial planning horizons, as well as cognitive ability. Conditional on all these factors, those with higher expected medical expenditures are more likely to purchase Medigap. Risk preferences do not appear as a source of advantageous selection; cognitive ability is particularly important. (c) 2008 by The University of Chicago. All rights reserved.