"Work hour flexibility is believed to help couples manage career and family demands. The German Socio-Economic Panel Study (SOEP) is unique in following both the flexible employee and their partner over time. The study utilizes this feature to investigate whether the take-up of work hour flexibility is detrimental for the flexible employee's wage development. Men and women benefit from flexible working hours. For women, this positive wage effect occurs late, suggesting that, unlike men, they must first prove their commitment. Moreover, it tests for the first time whether flexible workers' partners profit from the increased couple-level flexibility. The positive cross-partner effect for the inflexible partner is particularly pronounced for mothers' wages, suggesting that men may use flexible working hours to support their wives' careers. These measures are not necessarily used more frequently by those in need (e.g. parents or women). Instead, they seem to be accessed by those in sought-after positions. "

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