Knowledge that Transforms

The Medicare hospice program is intended to provide palliative care to terminal patients, but patients with long stays in hospice are highly profitable, motivating concerns about overuse among the Alzheimer's and Dementia (ADRD) population in the rapidly growing for-profit sector. We provide the first causal estimates of the effect of for-profit hospice on patient spending using the entry of for-profit hospices over 20 years. We find hospice has saved money for Medicare by offsetting other expensive care among ADRD patients. As a result, policies limiting hospice use including revenue caps and antifraud lawsuits are distortionary and deter potentially cost-saving admissions. (JEL H51, I11, I12, I18, J14, L84)

This paper develops a framework to extend the strategic form analysis of cursed equilibrium (CE) developed by Eyster and Rabin (2005) to multistage games. The approach uses behavioral strategies rather than normal form mixed strategies and imposes sequential rationality. We define and characterize properties of cursed sequential equilibrium (CSE) and apply it to four canonical economic applications: signaling games, reputation building, durable goods monopoly, and the dirty faces game. These applications illustrate various implications of CSE, show how and why it differs from sequential equilibrium and CE, and provide evidence from laboratory experiments that support the empirical relevance of CSE. (JEL C72, C73, D42, D82, D83)

We empirically characterize how China is internationalizing its bond market by staggering the entry of different types of foreign investors into its domestic market and propose a dynamic reputation model to explain this strategy. Our framework rationalizes China’s strategy as trying to build credibility as a safe issuer while reducing the cost of capital flight. We use our framework to shed light on China’s response to episodes of capital outflows. (JEL E44, F38, G12, G15, G23, O16, P34)

This paper studies the effect of nonlinear pricing on markups and misallocation. In a general equilibrium model in which firms are allowed to set a quantity-dependent pricing schedule, markup heterogeneity is not a sign of misallocation. Instead, we point to a new source of misallocation: high-taste consumers are allocated too much of each good, low-taste consumers too little. Using micro data from the retail sector, we show that nonlinear pricing is prevalent and quantify the model. Welfare losses from misallocation across consumers are substantially larger than those from misallocation across firms under linear pricing. (JEL D21, D24, D43, H25, J22, L13, L81)

We propose a model to study when an intermediate action can serve as a stepping stone that enables the elimination of a harmful norm. While the intermediate action may facilitate the first “step,” it may also become a new norm. We derive intuitive conditions for stepping stones, which depend on the relative size of social penalties and intrinsic utility benefits. We propose an econometric approach to testing whether an intermediate action is a stepping stone, and apply it to original data on female genital cutting in Somalia. The analysis shows that the intermediate action may become the new norm. (JEL I12, J16, O15, O17, Z13)

We model populism as the dissemination of a false “alternative reality,” according to which the intellectual elite conspires against the populist for purely ideological reasons. If enough voters are receptive to it, this alternative reality—by discrediting the elite's truthful message—reduces political accountability. Elite criticism, because it is more consistent with the alternative reality, strengthens receptive voters' support for the populist. Alternative realities are endogenously conspiratorial to resist evidence better. Populists, to leverage or strengthen beliefs in the alternative reality, enact harmful policies that may disproportionately harm the non-elite. These results explain previously unexplained facts about populism. (JEL D72, D82, D83)

This paper reviews the main motivations and arguments of my work on comparative development, colonialism, and institutional change, which was often carried out jointly with James Robinson and Simon Johnson. I then provide a simple framework to organize these ideas and connect them with my research on innovation and technology. The framework is centered around a utility-technology possibilities frontier, which delineates the possible distributions of resources in a society both for given technology and working via different technological choices. It highlights how various types of institutions, market structures, norms, and ideologies influence moves along the frontier and shifts of the frontier, and it provides a simple formalization of the social forces that lead to institutional persistence and those that can trigger institutional change. The framework also enables us to conceptualize how, during periods of disruption, existing—and sometimes quite small—differences can have amplified effects on prosperity and institutional trajectories. In this way, it suggests some parallels between different disruptive periods, including the onset of European colonialism, the spread (or lack thereof) of industrial technologies in the nineteenth century, and decisions related to the use, adoption, and development of AI today. (JEL D02, D72, E23, F54, O43)

A college degree offers a pathway to economic mobility for low-income students. Using a multisite randomized controlled trial combined with administrative and survey data, we demonstrate that intensive advising during high school and college significantly increases bachelor’s degree attainment among lower-income students. We leverage unique data on preadvising college preferences and causal forest methods to show that these gains are primarily driven by improvements in initial enrollment quality. Our results suggest that strategies targeting college choice may be a more effective and efficient means of increasing degree attainment than those focused solely on affordability. (JEL G51, I21, I22, I23)

Applicants to schools, colleges, and jobs hedge by applying to a broad range of options, including reaches, matches, and safeties. We develop a simultaneous-search framework that rationalizes this practice. In this framework, the admissions process is correlated across schools so that if an applicant is rejected by one school, she is more likely to be rejected by more selective schools. We find that an applicant then optimally targets both safeties and reaches. We characterize how the optimal portfolio varies with the applicant’s beliefs, risk attitudes, and application costs and offer an algorithm that delivers the optimal portfolio in polynomial time. (JEL D81, D83, D91, I23)

We study how individual political views shape firm behavior and labor market outcomes using new microdata from Brazil. We first show that business owners are considerably more likely to employ copartisan workers. This phenomenon is in part driven by the overlapping of political and social networks. Multiple tests—surveys, event studies, analyses of wage premia and promotions within the firm, and a field experiment—further highlight how business owners’ political preferences directly influence firms’ employment decisions. A channel of political discrimination appears more relevant than one of political quid pro quo between firms and politicians. (JEL C93, D22, D72, J23, M51, O17, Z13)