We show that higher payments from US Social Security Disability Insurance (DI) reduce mortality. Using administrative data on new DI beneficiaries, we exploit discontinuities in the benefit formula through a regression kink design. We estimate that $1,000 more in annual DI payments decreases the annual mortality rate of lower-income beneficiaries by approximately 0.18–0.35 percentage points, implying an elasticity of mortality with respect to DI income of around −0.6 to −1.0. We find no robust evidence of an effect of DI income on the mortality of higher-income beneficiaries.

Central to the welfare analysis of income transfer programs is the deadweight loss associated with possible reforms. To aid analytical tractability, its measurement typically requires specifying a simplified model of behavior. We employ a complementary “decomposition” approach that compares the behavioral and mechanical components of a policy’s total impact on the government budget to study the deadweight loss of two unemployment insurance policies. Experimental and quasi-experimental estimates using state administrative data show that increasing the weekly benefit is more efficient (with a fiscal externality of 53 cents per dollar of mechanical transferred income) than reducing the program’s implicit earnings tax.

ORDER TO PROVE PROPOSITION 1, we first present and prove the following lemmas.

We provide new evidence on the effect of the unemployment insurance (UI) weekly benefit amount on unemployment insurance spells based on administrative data from the state of Missouri covering the period 2003-2013. Identification comes from a regression kink design that exploits the quasi-experimental variation around the kink in the UI benefit schedule. We find that UI durations are more responsive to benefit levels during the recession and its aftermath, with an elasticity between 0.65 and 0.9 as compared to about 0.35 pre-recession.