[change] MD4SG workshop at EC'19

Hello everyone, Please consider submitting your work to Mechanism Design for Social Good workshop <http://md4sg.com/workshop/EC19/cfp.html> at ACM Conference on Economics and Computation (EC ’19) to be held in Phoenix, AZ, USA on 28 June 2019. The submission deadline is tomorrow. New, ongoing, and previously published work can all be submitted. Submissions from all disciplines related to the theme of the workshop welcome! Best, Aditya