This chapter primarily focuses on data, beginning with an overview of existing data sets, followed by a presentation of the survey data used in the analyses. Section 8.1, therefore, discusses the current state of existing datasets. The lack of a comprehensive dataset that would allow for in-depth analyses of the intra-family division of paid and unpaid work, is explained based on Lütolf and Stadelmann-Steffen (2023). Section 8.2 presents the new data collected from a comprehensive survey. The section illustrates a newly developed method for measuring the allocation of time within families and, furthermore, covers the experimental part of the survey. It presents the specific conjoint module of the survey, briefly explains the method more generally and discusses the concrete operationalisation of the variables used in the conjoint analysis. Section 8.3 discusses the operationalisation used for the regression analyses that determine the correlation between the duration of fathers’ leave and the intra-household distribution of unpaid work, estimated in Chapter 10. The section describes the measurement of the duration of leave and introduces the caregap– the variable to assess the equality of the distribution of unpaid work within a couple.