Table 2 Overview of variables and number of categories used in the analyses
Variables | Bias analysis | Predictors of panel participation analysis | |
|---|---|---|---|
Reinterview participation | Cumulative participation | ||
General characteristics | |||
Region | 2 | – | – |
Establishment size (number of employees) | 3 | 3 | 9 |
Industry | 3 | – | – |
Year of foundation | 4 | – | – |
Employee structure | |||
Pct. of female employees | 4 | – | – |
Pct. of German employees | 2 | – | – |
Average age of employees (years) | 4 | – | – |
Pct. of low-qualified employees | 2 | – | – |
Pct. of middle-qualified employees | 4 | – | – |
Pct. of high-qualified employees | 4 | – | – |
Employment structure | |||
Pct. of marginal employees | 4 | – | – |
Pct. of full-time employees | 4 | – | – |
Survey variables | |||
Item nonresponse | – | 2 | 2 |
Interviewer change | – | 2 | - |