LONDON (AP) — Female managers in Britain earn £10,000 ($15,600) a year less than their male counterparts, and at current rates will wait 57 years to achieve parity, according to a study released yesterday.

The research by the Chartered Management Institute is the latest to highlight the continuing gender gap, despite 40-year-old legislation making it illegal to pay men and women differently for the same work. The gap is partly attributable to men having seniority or getting bigger bonuses. But even at junior management level, the study found women earn at least £1,000 a year less than men.

Petra Wilton, the institute's head of policy, said the government should "take greater steps to enforce pay equality by monitoring organisations more closely and naming and shaming those who fail to pay male and female staff fairly".

The institute surveyed more than 43,000 managers in 200 organisations. It found that women's salaries are growing faster — up 2.8 percent last year, compared to 2.3 percent for men.