We examine the degree to which federal fiscal integration smoothes income and unemployment shocks across US States. We find that roughly 25 cents of every dollar of income shock at the state level is offset by federal fiscal policy. This stabilization comes entirely through the Federal tax system, not through spending stabilizers, automatic or otherwise. If we apply a comparable amount of cross country stabilization to European Union countries (as exists across US States), Greece and Spain would be receiving additional transfers of 2.5 percent of GDP.

Measuring the geographic spillovers from an economic shock remains a challenging econometric problem. In Feyrer, Mansur, and Sacerdote (2017) we study the propagation of positive shocks from the recent boom in oil and gas production in the United States. We regress changes in income per capita on new energy production per capita within increasingly larger geographic circles. James and Smith (2020) proposes instead a single regression of county income per capita on energy production from successively larger donuts around the county. This method controls for production outside of the circle of interest and is likely the appropriate estimation method for estimating the impact of within-county production. Their results suggest that FMS overestimates the impact of new production. We show that we can incorporate similar controls using our basic estimation method and that (unlike James and Smith) these controls do not significantly change our results. To explore these differences, we perform simulation exercises which show that the James-Smith estimation method is biased downward with the heterogeneous population distributions across counties that we observe in the data.

We track the geographic and temporal propagation of local economic shocks from new oil and gas production generated by hydrofracturing. Each million dollars of new production produces $80,000 in wage income and $132,000 in royalty and business income within a county. Within 100 miles, one million dollars of new production generates $257,000 in wages and $286,000 in royalty and business income. Roughly two-thirds of the wage income increase persists for two years. Assuming no general equilibrium effects, new extraction increased aggregate US employment by as many as 640,000, and decreased the unemployment rate by 0.43 during the Great Recession.