Approximately 1-in-7 people and 1-in-4 children received benefits from the US Supplemental Nutrition Assistance Program (SNAP) in July 2011, both all-time highs. We analyze changes in SNAP take-up over the past two decades. From 1994 to 2001, coincident with welfare reform, take-up fell from 75%...

Approximately 1-in-7 people and 1-in-4 children received benefits from the US Supplemental Nutrition Assistance Program (SNAP) in July 2011, both all-time highs. We analyze changes in SNAP take-up over the past two decades. From 1994 to 2001, coincident with welfare reform, take-up fell from 75%...

The past thirty years have seen a dramatic decrease in the rate of income convergence across U.S. states. This decline coincides with a similarly substantial decrease in population flows to wealthy states. We develop a model where labor mobility plays a central role in convergence and can...

The Regression Kink (RK) design is an increasingly popular empirical method for causal inference. Analogous to the Regression Discontinuity design, which evaluates discontinuous changes in the level of an outcome variable with respect to the running variable at a point at which the level of a...

The Regression Kink (RK) design is an increasingly popular empirical method, with more than 20 studies circulated using RK in the last 5 years since the initial circulation of Card, Lee, Pei and Weber (2012). We document empirically that these estimates, which typically use local linear...

The past thirty years have seen a dramatic decrease in the rate of income convergence across U.S. states. This decline coincides with a similarly substantial decrease in population flows to wealthy states. We develop a model where labor mobility plays a central role in convergence and can...

Although Pay for Success (PFS) contracts have received widespread attention in the United States and abroad, there is nothing fundamentally new about governments paying for outcomes. Performance clauses in construction contracts are common, and the Department of Defense has procured services...