The Global Development And Environment Institute (GDAE, pronounced “gee-day”) is a research center at Tufts University, US, founded in 1993. GDAE works to promote a better understanding of how societies can pursue their economic and community goals in an environmentally and socially sustainable manner. GDAE pursues its mission through original research, policy work, publication projects, curriculum development, conferences and other activities.
More information on the Wikipedia page 
The website is