Thutupalli, Shashi, Sravanti Uppaluri, George Constable, Simon Levin, Howard Stone, Corina Tarnita, and Clifford Brangwynne. (2017) 2017. “Farming and Public Goods Production in Populations.”. Proceedings of the National Academy of Sciences of the United States of America 114 (9): 2289-94. doi:10.1073/pnas.1608961114.