Search Results
Working Paper
When should children start school?
Kindergarten-entrance-age effects are difficult to identify due to the nonrandom allocation of entrance-age and simultaneous relative-age effects. This paper presents evidence that instrumental variable frameworks do not identify age effects for the youngest children of a cohort using the results of statistical tests for essential heterogeneity in initial enrollment decisions. Restricting attention to the oldest children in a cohort yields a sample with quasirandom variation in entrance and relative ages. This variation is used to identify the parameters of education production functions in ...
Working Paper
Community-based well maintenance in rural Haiti
The international community has pledged $11 billion to Haiti, a country where nongovernmental organizations (NGOs) provide nearly all public goods and services. This raises at least two questions: How can NGOs most effectively perform their own work, and how can NGOs integrate their programs into broader efforts organized by public institutions? This paper addresses these questions by evaluating the community-based model of Haiti Outreach (HO) that focuses on training communities to manage wells after they have been constructed. The effect of this management training is identified by ...
Journal Article
The Opioid Epidemic and the Labor Market
Drug overdoses now account for more deaths in the United States than traffic deaths or suicides, and most of the increase in overdose deaths since 2010 can be attributed to opioids--a class of drugs that includes both prescription pain relievers and illegal narcotics. We look at trends in drug use and overdose deaths to document how the opioid epidemic has evolved over time and to determine whether it could be large enough to impact the labor force.
Working Paper
Differences of Opinions
This paper presents a generalization of the DeGroot learning rule in which social learning can lead to polarization, even for connected networks. I first develop a model of biased assimilation in which the utility an agent receives from past decisions depends on current beliefs when uncertainty is slow to resolve. I use this model to motivate key features of an agent?s optimization problem subject to scarce private information, which forces the agent to extrapolate using social information. Even when the agent extrapolates under ?scientific? assumptions and all individuals in the network ...
Journal Article
Racial Inequality, Neighborhood Effects, and Moving to Opportunity
Moving to Opportunity (MTO) was a housing mobility program designed to investigate neighborhood effects, the influences of the social and physical environment on human development and well-being. Some of the results from MTO have been interpreted as evidence that neighborhood effects are not as strong as earlier evidence had indicated. This Commentary discusses new research suggesting that neighborhood effects are, on the contrary, as strong and policy relevant as suspected before the experiment. This Commentary also discusses why the interpretation of the MTO data is important: If ...
Working Paper
Assessing the evidence on neighborhood effects from moving to opportunity
This paper presents a new perspective on results from the Moving to Opportunity (MTO) housing mobility program. Building on recent developments in the program evaluation literature, this paper defines several treatment effect parameters and then estimates and interprets these parameters using data from MTO. The evaluation framework is used to make a clear distinction between the interpretation of Intent to Treat (ITT) and Treatment on the Treated (TOT) parameters as program effects and Local Average Treatment Effect (LATE) parameters as neighborhood effects. This distinction helps to clarify ...
Working Paper
What Is the Equity-Efficiency Tradeoff when Maintaining Wells in Rural Haiti?
This paper quantitatively compares water infrastructure interventions that prioritize equity with those that prioritize efficiency. The community-based model developed by Haiti Outreach (HO) trains communities to operate and maintain wells, and has clear effi ciency gains over the status quo aid model in Haiti that gives communities wells: HO?s wells were 8.7 percentage points more likely to be functioning after one year than similarly-constructed wells managed under the status quo model. Because HO?s model includes user fees, which raise concerns about equity, I quantify the ...
Journal Article
The Racial Wealth Gap and Access to Opportunity Neighborhoods
Some Black households live in neighborhoods with lower incomes, as well as higher unemployment rates and lower educational attainment, than their own incomes might suggest, and this may impede their economic mobility. We investigate reasons for the neighborhood sorting patterns we observe and find that differences in financial factors such as income, wealth, or housing costs between Black and white households do not explain racial distributions across neighborhoods. Our findings suggest other factors are at work, including discrimination in the housing market, ongoing racial hostility, or ...
Working Paper
What Determines the Success of Housing Mobility Programs?
This paper studies how design features influence the success of Housing Mobility Programs (HMPs) in reducing racial segregation. Targeting neighborhoods based on previous residents' outcomes does not allow for targeting race-specific outcomes, generates uncertainty when targeting income-specific outcomes, and generates bias in ranking neighborhoods' effects. Moreover, targeting opportunity bargains based on previous residents' outcomes selects tracts with large disagreements in current and previous residents' outcomes, with such disagreements predicted by sorting since 1990. HMP success is ...
Working Paper
Can Wealth Explain Neighborhood Sorting by Race and Income?
Why do high-income blacks live in neighborhoods with characteristics similar to those of low-income whites? One plausible explanation is wealth, since homeownership requires some wealth, and black households hold less wealth than white households at all levels of income. We present evidence against this hypothesis by showing that wealth does not predict sorting into neighborhood quality once race and income are taken into account. An alternative explanation is that the scarcity of high-quality black neighborhoods increases the cost of living in a high-quality neighborhood for black households ...