IFS/STICERD/UCL Development Work in Progress Seminar
Salting the Earth: Shrimp Farming and Agricultural Externalities in Bangladesh
Jack Thiemel (Department of Economics, LSE), joint with Krittika Ray
Thursday 17 September 2026 14:00 - 15:00
Many of our seminars and public events this year will continue as in person or as hybrid (online and in person) events.
Please check our website listings and Twitter feed @STICERD_LSE for updates.
Unless otherwise specified, in-person seminars are open to the public. Please ensure you have informed the event contact as early as possible.
Those unable to join the seminars in-person are welcome to participate via zoom if the event is hybrid.
About this event
Climate change is raising groundwater salinity across coastal regions, threatening smallholder livelihoods. In Bangladesh, a common adaptation is to convert rice paddies into saltwater shrimp ponds ? a technology that thrives where rice cannot. We ask whether this private adaptation generates negative externalities on neighboring rice farmers, and how this affects the adoption of the technology. Combining a novel household survey with a satellite panel covering 80,000 plots over nine years, we document a sharp salinity gradient at the shrimp?rice boundary: bordering rice plots show significantly higher salinity and lower yields than otherwise comparable plots. Event-study estimates show that a neighbor?s conversion from rice to shrimp raises own-conversion likelihood and depresses vegetation indices on remaining agricultural plots, suggesting that climate resilience for some can erode it for others.