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Table 12 Overview of the different versions of the IAB employment samples (scientific use files only)

From: Does the IAB employment sample reliably identify maternity leave taking? A data reportKann die IAB-Beschäftigtenstichprobe benutzt werden, um Erziehungsurlaub verlässlich zu identifizieren? Ein Daten-Report

  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   
  1. Note: The table provides an overview of the different versions of the IAB scientific use files.