1. OECD: Main Economic Indicators, December 1993.
2. For a more comprehensive description see E. Appelbaum, R. Schettkat: Employment Developments in industrialized Economies: Explaining Common and Diverging Trends, Discussion Paper FS 1 93-313, Wissenschaftszentrum Berlin für Sozialforschung 1993.
3. F. W. Scharpf: Structures of Post-Industrial Society-or-Does Mass Unemployment Disappear in the Service and Information Economy?, in: E. Appelbaum, R. Schettkat (eds.): Labor Market Adjustment to Structural Change and Technological Progress, New York, Westport, London 1990, pp. 17–35.
4. NBER Working Paper;L. A. Bell,1985
5. Paper presented at the conference on Labor Contracts and Mobility;R. B. Freeman,1993