Calculations are based on microdata from the European Working Conditions Survey (EWCS), coordinated by Eurofound. The survey aims to represent the population of all employed persons aged 15 or older.
The question considered is question Q97 from the 2015 EWCS survey in the EWCS Integrated Data File, 1991-2015: How many hours does your partner normally work per week, including any paid or unpaid overtime?1 Up to 19 hours; 2 20 to 34 hours; 3 35 to 40 hours; 4 41 or more hours.
For each response category, the indicator is calculated as the percentage of employed persons who answered the question using this response category out of all respondents who were asked to respond to this question.
The selection of relevant questions from the EWCS surveys to be included in the database was based on the following criteria:
Available flags:
| b | break in time series | c | confidential |
| d | definition differs, see metadata | e | estimated |
| f | forecast | i | see metadata |
| m | imputed | n | not significant |
| p | provisional | r | revised |
| s | Eurostat estimate | u | low reliability |
| x | dropped due to insufficient sample size | y | unreliable due to small sample size |
| z | not applicable |