Boaz Abramson Assistant Professor, Columbia Business School

Research

Publications

International Integration and Social Identity (with Moses Shayo)

Journal of International Economics. Vol 137, 2022.

This paper contributes to the literature incorporating social identity into international economics. We develop a theoretical framework for studying the interplay between international integration and identity politics, taking into account that both policies and identities are endogenous. We find that, in general, a union is more fragile when peripheral member countries have higher status than the Core, as this leads to stronger national identification in equilibrium and a lower willingness to compromise. Low-status countries are less likely to secede, even when between-country differences in optimal policies are large, and although equilibrium union policies impose significant economic hardship. Contrary to the anticipation of some union advocates, mutual solidarity is unlikely to emerge as a result of integration alone.

Working Papers

The Equilibrium Effects of Eviction Policies

I propose a dynamic equilibrium model of the rental markets that endogenously gives rise to defaults on rents and evictions. In the model, eviction protections make it harder to evict delinquent renters, but higher default costs to landlords increase equilibrium rents. I quantify the model using micro data on evictions, rents, and homelessness. I find that stronger eviction protections exacerbate housing insecurity and lower welfare. The key empirical driver of this result is the persistent nature of risk underlying rent delinquencies. Rental assistance reduces housing insecurity and improves welfare because it lowers the likelihood that renters default ex-ante.

Macroeconomics of Mental Health (with Job Boerma and Aleh Tsyvinski)

We develop an economic theory of mental health. The theory is grounded in classic and modern psychiatric literature, is disciplined with micro data, and is formalized in a life-cycle heterogeneous agent framework. In our model, individuals experiencing mental illness have pessimistic expectations and lose time due to rumination. As a result, they work less, consume less, invest less in risky assets, and forego treatment which in turn reinforces mental illness. We quantify the societal burden of mental illness and evaluate the efficacy of prominent policy proposals. We show that expanding the availability of treatment services and improving treatment of mental illness in late adolescence substantially improve mental health and welfare.

Rent Guarantee Insurance (with Stijn Van Nieuwerburgh)

A rent guarantee insurance (RGI) policy makes a limited number of rent payments to the landlord on behalf of an insured tenant unable to pay rent due to a negative income or health expenditure shock. We introduce RGI in a rich quantitative equilibrium model of housing insecurity and show it increases welfare by improving risk sharing across idiosyncratic and aggregate states of the world, reducing the need for a large security deposits, and reducing homelessness which imposes large costs on society. While unrestricted access is not financially viable with either private or public insurance providers due to moral hazard and adverse selection, restricting access can restore viability. Private insurers must target better off renters to break even, while public insurers focus on households most at-risk of homelessness.

Subjective Financial Literacy in Housing Markets (with Andres Yany)

This paper studies the role of subjective financial literacy in housing choices. We find that individuals who self-assess themselves as more financially literate are more likely to become homeowners and tend to take on more levered positions to finance their home acquisition. We solve a heterogeneous agent portfolio choice model to infer the mechanisms that underlie the empirical patterns. We find that households who self-assess themselves as more financially literate are in fact more financially savvy - they access cheaper and larger credit and earn higher risk-adjusted returns on their housing investments. We show that heterogeneity in financial literacy is important for reliably evaluating housing policies. The elasticity of homeownership with respect to wealth is roughly halved when heterogeneity in financial literacy is modeled.

Work in Progress

Search to Rent or Search to Own: Housing Market Churn in the Cross Section of Cities (with Tim Landvoigt, Monika Piazzesi and Martin Schneider)

This paper measures structural vacancies in housing markets with tenure choice. We first document that (i) inventory for rent and for sale are strongly correlated across US metro areas and (ii) months supply (inventory relative to monthly volume) is always larger in rental markets: a renter is faster to find than a buyer. We propose a search model with developers who choose between selling houses, which yields higher surplus, or renting them out, which allows for faster matching. The estimated model accounts for the facts and allows us to infer structural vacancies from the behavior of inventory and volume. Structural vacancies in rental markets are negative in many cities even while they are positive in owner occupied markets.