Microgiving, a new form of digital fundraising, operates by soliciting minuscule, recurring donations from large numbers of potential donors. We evaluate a charity subscription program operated by Alibaba, China's largest retail platform, which allows sellers to pledge a tiny portion of a...

Forests accompany the cities we build. There are an estimated 5.5 billion urban trees in the United States. Globally, about 25 percent of urban land is covered by tree canopy. This study examines urban forests as a policy tool for air pollution mitigation. We study an afforestation program in...

This paper documents tax-minimizing investment, in which firms tilt capital purchases toward fiscal year-end to reduce taxes. Between 1984 and 2013, average investment in fiscal Q4 exceeds the average of fiscal Q1 through Q3 by 37%. Q4 spikes occur in the U.S. and internationally. Research...

International organizations such as the United Nations, the World Bank, the Organization for Economic Cooperation and Development, and the International Monetary Fund routinely organize cross-learning programs on specific topics for their member governments. Likewise, many national governments...

Although immigration reform has proved elusive for more than forty years, presidents from both parties have issued crucial executive actions that regulate inflows of new immigrants and the status of those already in the US. We focus on a particular class of executive actions, those related to...