Biographic analysis of the demograpchic characteristics of life histories of men and women in regional labour- market-cohorts as clusters of birth cohorts paper prepared for the symposium "Life Histories and Generations" held at the Netherlands Institute for Advanced Studies in the Humanities and Social Sciences (NIAS), Wassenaar, June 1989 - Birg, Herwig 1939-; Flöthmann, E.-Jürgen; Reiter, Iris (Inst. for Population Research and Social Policvy, Univ. of Bielefeld, 1989)