Bachmann, Ronald; David, Peggy - 2009
-status, social security employment for West Ger-
1The next section provides a brief overview of the literature.
2
many. The former … worked in an employment covered by social security between
1975 and 2006.4 For 1995, this data source contains the employee … at least one
worker who pays social security contributions. Starting in 1993, this survey is drawn
4This data base has …