By Elizabeth Harrin (London)
Norway is considered one of the most progressive countries with regards to increasing the number of women on boards – thanks to it being an early adopter of legislation to force companies to recruit women to the boardroom. It sounded like a great idea to improve diversity and shareholder returns, and since then many other countries have adopted or considered similar laws. It’s been seven years since the law took affect. Has it made any difference?
Amy Dittmar, associate professor of finance at the University of Michigan’s Ross School of Business has recently analysed the impact of the Norwegian decision, and she doesn’t think so. Dittmar and her colleague Kenneth Ahern studied what happened after Norway required public-limited firms to have at least 40% of board seats filled by women in 2003. Voluntary compliance in the country failed, so the law made it compulsory in 2006, with a two year transition period. “Boards are chosen in order to increase shareholder wealth,” says Dittmar. “Placing restrictions on the composition of a board will reduce value.”
Dittmar and Ahern’s study found that when a board had a 10% increase in the number of women, the value of the company dropped. The bigger the change to the structure of the board, the bigger the fall in returns.