“…The official data on participation, in most countries, typically only include other simple variables such as age or sex. For this reason, it is common to find studies matching the administrative register data to other data files including some variables of interest (Bellettini et al, 2017;Bratsberg et al, 2019;Goldberg & Sciarini, 2023;Zeglovits & Aichholzer, 2014).…”