1. AidData, Global Research Institute, William & Mary, Williamsburg, VA 23185, USA
2. Department of Economics, William & Mary, Williamsburg, VA 23185, USA
3. Department of Applied Science, William & Mary, Williamsburg, VA 23185, USA
4. Geospatial Evaluation and Observation Lab, Data Science Program, William & Mary, Williamsburg, VA 23185, USA