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American Universities and Colleges ( American Council on Education, 2001 ) was used to sample U. universities and colleges, while World List of Universities and Other Institutions of Higher Education ( International Association of Universities, 2004 ) was used to generate the Chinese sample.

An online source ( Viron, 2005 ) was used to complement and verify data from these two print sources. A total of 1,926 sites were manually examined and 1,664 sites were finally included in the study. See Table 1 for the breakdown by countries and types of sites.