题目：Understanding the Value of Fulfillment Flexibility in an Online Retailing Environment.
Yehua Wei is an Associate Professor in Decision Sciences at Duke University. He has received his PhD in Operations Research from MIT in 2013, and prior to his appointment at Duke, he was an Assistant Professor in the Operations Management Department at Boston College. His research interest includes optimizing decisions under uncertainty, designing sparse resource pooling systems, and strategic customers in queueing networks. He has published articles in Operations Research，Management Science，and Production and Operations Management. His research has won a number of awards, including 2nd place of the 2011 George Nicholson Paper Competition, 2nd place of the 2013 CSAMSE Best Paper Competition, and the 2014 Daniel H. Wagner Prize for Excellence in Operations Research Practice.