This report describes the statistical methodologies for the survey. The first section describes the sample design and selection of the sample. The second section describes weighting and variance estimation. The third section describes the statistical tests used for the 2018 WGRC. The fourth section describes the calculation of cooperation, completion, and response rates for the full sample and population subgroups. The fifth section summarizes the findings from the non-response bias analysis.
Note: Prior to 2025, OPA research products used the term “gender” to describe men and women. These groups were defined using survey items and/or administrative data categories for “male” and “female”; therefore, references to gender should be understood to mean “sex”.