78 Jacob Mincer, “Human Capital and the Labor Market”, Educational Researcher, 1989 (18) , pp.27 34. 79 Becker, G. (1993), Human capital : a theoretical and empirical analysis, with special reference to education, The University of Chicago Press. 80 Johnson, W.R., “A Theory of Job Shopping”.The Quarterly Journal of Economics, 1978 (92) , pp.261 277. 81 Jovanovic, Boyan, “Job Matching and the Theory of Turnover”, Journal of Political Economy, 1979 (87) , pp.972 990 82 Kathy E. Kram and Lynn A. Isabella. Mentoring Alternatives: The Role of Peer Relationships in Career Development[J]. The Academy of Management Journal, 1985, 28(1) : 110-132. 83 OECD (2020), Promoting an Age-Inclusive Workforce: Living, Learning and Earning Longer, OECD Publishing, Paris, https://doi.org/10.1787/59752153-en. 84 Eurofound,https://www.eurofound.europa.eu/publications/report/2006/labour-market-social-policies/a-guide-to-good-practice-in-age-management