@conference {parkes10,
	title = {Promoting Sustainability: Exploring the Role of Expressive, Indirect, and Hidden Markets},
	booktitle = {2nd International Conference on Computational Sustainability (CompSust{\textquoteright}10)},
	year = {2010},
	url = {http://econcs.seas.harvard.edu/files/econcs/files/parkes10.pdf},
	author = {David C. Parkes}
}
