@article {stavins_problem_2011,
	title = {The Problem of the Commons: Still Unsettled After 100 Years},
	journal = {American Economic Review},
	volume = {101},
	year = {2011},
	note = {A-63},
	pages = {81{\textendash}108},
	issn = {0002-8282},
	doi = {10.1257/aer.101.1.81},
	url = {http://www.aeaweb.org.ezp-prod1.hul.harvard.edu/articles.php?doi=10.1257/aer.101.1.81},
	author = {Robert N. Stavins}
}
