@conference {924771, title = {Low-Cost Learning via Active Data Procurement}, booktitle = {Proc. of the 16th ACM Conference on Economics and Computation (EC)}, year = {2015}, pages = {619-636}, address = {Portland, Oregon}, url = {http://econcs.seas.harvard.edu/files/econcs/files/p619-abernethy.pdf}, author = {Jacob Abernethy and Yiling Chen and Chien-Ju Ho and Bo Waggoner} }