?????. ???? BK21 ??????.
2012? 7? 23? ???? ??? ??? ??? ????.
???? BK21 ????? Euncheol Shin (Ph.D. Student, Division of Humanities and Social Sciences, Calfornia Institute of Technology) ??? ??? ???? ??? ?? ????? ??? ?? ??? ????? ?????? ?? ??? ?? ????.
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? ? : 7? 23?, ?? 4?
? ? : ?????? 337?
? ? : The Diffusion of Network Goods: A Two-Sided Interaction Approach∗