Prior to beginning her Ph.D. in Environmental Economics, Greer graduated with a BSc(Hons) in Economics and a BA (Hons) in Political Science at Loyola Marymount University, where she used experimental methods to study the effects of information and norms on common-pool resource extraction.

Subsequently, Greer completed an MSc in Environmental Economics and Climate Change at LSE, for which she conducted her dissertation on the impacts of norms and financial incentives on energy consumption.