衷心感谢Cshan

题目：The Effects of Cash, Electronic, and Paper Gift Certificates as Respondent Incentives for a Web-Based Survey of Technologically Sophisticated Respondents

链接：http://ssc.sagepub.com/cgi/content/abstract/22/3/355?ck=nck

[此贴子已经被作者于2008-7-24 14:08:58编辑过]