@article{O'Connell1993,
	title = {Dynamic efficiency in the gifts economy},
	author = {Stephen A. O'Connell and Stephen P. Zeldes},
	journal = {Journal of Monetary Economics},
	month = {Jun},
	number = {3},
	pages = {363--379},
	url = {http://www.sciencedirect.com/science/article/B6VBW-45GSFJ6-W/1/6813fd10d0c7e6c9b9ae01c4f386d05b},
	volume = {31},
	year = {1993},
	biburl = {http://www.bibsonomy.org/bibtex/29bfc9a9a16f2e3675ab3ef5d5b27dfb7/smicha},
	keywords = {Dynamic efficiency }
}