You can read the Bruno, Sexton and Sumner article in the 2020 March-April publication of the ARE UPDATE.
The ARE UPDATE is a bimonthly magazine published by the University of California Giannini Foundation of Agricultural Economics for the purpose of providing wide dissemination of research results and expert opinion from faculty, CE Specialists and graduate students in agricultural and resource economics at UC Davis and UC Berkeley. The ARE Update targets a lay audience of policy makers, Cooperative Extension advisors, agribusiness managers, and other professionals interested in agricultural, resource, environmental, and development economics.
Read the article here.