Carnegie Mellon University
5000 Forbes Avenue
Pittsburgh, PA 15213
Institutional Affiliation: Carnegie Mellon University
NBER Working Papers and Publications
|June 2018||The Short-Run and Long-Run Effects of Resources on Economic Outcomes: Evidence From the United States 1936-2015|
with Karen Clay: w24695
This paper draws on a new state-level panel dataset and a model of domestic Dutch disease to examine the short-run and long-run effects of oil & natural gas, coal, and agricultural land endowments on state economies during 1936-2015. Using a flexible shift-share estimation approach, where the shift is national resource employment and the share is state resource endowment, we find that different resources had different short-run effects in different time periods, across increases and decreases in resource employment, and across different outcomes. Using long differences, we find that long-run population growth was an important margin of adjustment over 1936-2015. States with larger coal and agricultural endowments per square mile experienced significantly slower population growth than state...
|May 2018||Toxic Truth: Lead and Fertility|
with Karen Clay, Edson Severnini: w24607
Using U.S county level data on lead in air for 1978-1988, this paper provides the first causal evidence on the effects of airborne lead exposure on the general fertility rate and the completed fertility rate in the broad population. Instrumental variable estimates show the increase in completed fertility implied by the average observed decrease in airborne lead is 0.14 children per woman, which is 6.4 percent of mean fertility. To explore the current relevance of our findings, we estimate the effect of lead historically accumulated in topsoil on fertility in the 2000s. The results suggest that lead may continue to impair fertility today, both in the United States and in other countries that have significant amounts of lead in topsoil.