Governments in emerging markets often behave like a "tormented insurer," trying to use non-state-contingent debt instruments to avoid cuts in payments to private agents despite large fluctuations in public revenues. In the data, average public debt-GDP ratios decline as the variability of...

We conduct a comparative welfare analysis of 133 historical policy changes over the past half-century in the United States, focusing on policies in social insurance, education and job training, taxes and cash transfers, and in-kind transfers. For each policy, we use existing causal estimates to...

We describe the enormous changes in social and tax policy in recent years that have encouraged work by single mothers. We document the changes in federal and state income taxes, AFDC and Food Stamp benefits, Medicaid, training and child care programs. We describe the quantitative importance of...