Table 12 Overview of the different versions of the IAB employment samples (scientific use files only)
Short description | Anonymization | Suitable to identify maternity leave spells? | |
|---|---|---|---|
IABS 75-95 (scientific use file) | 1% random sample | Aggregation of certain variables (mostly region) | No, because of the forward/backward shifting of individual spells |
1975–1995 | Exclusion of some variables | ||
Detailed occupation and industry classification | Forward or backward shifting of all spells of an individual by a random constant | ||
Only two regions, eastern and western Germany, can be distinguished | |||
IABS 75-97 (scientific use file) | 1% random sample | Aggregation of certain variables (mostly occupation and industry) | No, because of the forward/backward shifting of individual spells |
1975–1997 | Exclusion of some variables | ||
aggregation of occupation and industry classifications | Forward or backward shifting of all spells of an individual by a random constant | ||
Detailed regional classification | |||
IABS 75-01 (scientific use file) | 2% random sample | Aggregation of certain variables (mostly occupation and industry) | Yes |
1975–2001 | Exclusion of some variables | ||
aggregation of occupation and industry classifications | |||
Detailed regional classification | |||
IABS 75-04 (scientific use file) | 2% random sample | See IABS 75-01 | Yes |
1975–2004 | |||
Aggregation of occupation and industry classifications | |||
Detailed regional classification |