Yale University's Global Network for Advance Management surveyed 4,881 students and alumni of the network's 29 schools.
It found that on average women workers surveyed believe that 55 per cent of childcare should be the mother's responsibility.
This figure was the same when asked of men, and employers.
However, the data also found that employers were less likely to care if an applicant was unable to commit to 'working around the clock' once they were shown productivity information for a candidate.
When respondents were told about the productivity for both candidates (high, medium, low), the preference for around-the-clock availability virtually disappears.
In jobs and professions in which productivity is hard to attribute to a particular person in a team or process, time availability can become a noisy signal of productivity rather than an input of productivity itself.
Cheap proxies for worker evaluation of this kind are costly not only to women, but also to men who may prefer a better career- family or work-life balance.