By necessity, my work draws on interdisciplinary approaches and collaborations across the social and natural sciences. I also maintain a secondary interest in historical political economy as it pertains to the determination and persistence of social inequalities.
Works in progress
Global income distributions and social welfare under climate change
- Major revision in progress
- JMP version previously circulated with the title “Climate inequality”
Temperature, institutions, and the political climate
- Major revision in progress
Evidence of a drought effect on the hazard into spousal violence
Publications
Large potential reduction in economic damages under UN mitigation targets
We present a probabilistic framework for assessing aggregate economic impacts of anthropogenic warming. Our construction decomposes uncertainty associated with mid-century and end-of-century economic projections into distinct sources of uncertainty associated with i) econometric estimation of the economic effects of environmental change, ii) climate models of the spatial distribution of anthropogenic warming, iii) the projected schedule of greenhouse gas concentrations associated with a radiative forcing, and iv) the social discounting regime of choice. We apply this framework to characterize the economic benefits of climate policy, emphasizing how achieving the most ambitious mitigation targets of the 2015 Paris Agreement would obviate essentially certain economic calamity that will otherwise concentrate in developing countries.

Paper materials and links
- Paper: official $\cdot$ ungated
- Replication files
- Stanford ECHO Lab website
Select citations
New York Times $\cdot$ The Guardian $\cdot$ Governors of New York, California, and Washington $\cdot$ IPCC Special Report on Global Warming of 1.5°C (SR15) $\cdot$ MSNBC (TV) $\cdot$ “The Uninhabitable Earth” by David Wallace-Wells $\cdot$ Rezo $\cdot$ Bernie Sanders $\cdot$ US House Committee on Financial Services $\cdot$ IPCC Sixth Assessment Report (AR6-WGII)
Select press
Nature $\cdot$ Stanford $\cdot$ Bloomberg $\cdot$ CBS (TV) $\cdot$ The Guardian $\cdot$ Reuters $\cdot$ The Hill $\cdot$ Yahoo $\cdot$ Axios $\cdot$ The New Yorker $\cdot$ Business Insider $\cdot$ Rolling Stone $\cdot$ The Daily Show (TV)
Combining satellite imagery and machine learning to predict poverty
Efforts to study and design policy addressing the challenges of global poverty and inequality are hampered by the infrequency and prohibitive expense of reliable measurement of welfare, particularly in the developing world. Here we demonstrate a scalable method for overcoming this data scarcity which works by extracting economic information from an unconventional but inexpensive source of data with increasingly frequent and essentially global coverage: high-resolution daytime satellite imagery.
Our “transfer learning” pipeline proceeds by first assigning a convolutional neural network model pre-trained for generic image classification the task of identifying features in the daytime imagery predictive of night-time luminosity, a crude proxy for economic activity. In effect, the CNN learns to produce a nonlinear mapping from the unstructured images to a low-dimensional vector representation of its most economically informative features. Ridge regression models are then optimized to produce out-of-sample estimates of consumption expenditures and asset wealth. In an initial application to five diverse sub-Saharan African countries—Nigeria, Tanzania, Uganda, Malawi, and Rwanda—our entirely open-source models are able to explain up to 75% of the variation in village-level outcomes as measured by household surveys, demonstrating potential to reduce misallocation costs in the administration of targeted social programs.

Paper materials and links
- Paper: official $\cdot$ ungated
- Replication files: code and data $\cdot$ closed issues
- Authors’ blog posts: summary $\cdot$ genesis $\cdot$ update
- Sustain Lab website
- Non-technical animated video summary
Select press
Science $\cdot$ Stanford $\cdot$ The Washington Post $\cdot$ BBC $\cdot$ Scientific American $\cdot$ The Atlantic $\cdot$ The Onion $\cdot$ Bill Gates $\cdot$ Center for Global Development