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3. Bishop, John and Kang, Suk. “On-the-Job Training/ Sorting: Theory and Evidence” National Center for Research in Vocational Education, Ohio State University, 1984.
4. Bishop, John and Kang, Suk. “A Signaling/Bonding Model of Employer Finance of General Training.” Center for Advanced Human Resource Studies, Cornell University, Ithaca, New York, 1988.
5. Bishop, John; Hollenbeck, Kevin; Kang, Suk and Willke, Richard. Training and Human Capital Formation. Columbus: The National Center for Research in Vocational Education, The Ohio State University, 1985.