The study by the Institute of Fiscal Studies said Tuesday that women find that by the time their first child reaches the age of 12, their hourly pay is down 33 percent versus that of men.
The report says that the difference could be attributed to women putting in fewer hours at the office and missing out on promotions as a result.
Overall, women in paid work receive 18 percent less per hour than men, compared to 28 per cent less in 1993.
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