Sure. At the risk of repeating what Alex has said, I think one of the things that unions, and indeed any employer, can do to close the wage gap is to actually track what's happening rather than relying on anecdotal evidence. This happens to be something that unions and public sector employers do well, because they have pay equity policies in place. They actually track rates of pay. They track the way they're categorizing work and the way they're then valuing that work and compensating it. The result is that compared to the private sector you do see an 8% smaller gap in the public sector. You also see higher than average incomes for women in the public sector than in the private sector.
But there's no reason that the private sector can't do the same thing. I suspect there are particular instances of particular private sector employers who do this. We just don't have, across the board, private sector policies that are working to ensure that they are paying their employees equitably. That's one of the big differences.
I think the other difference is that obviously pay is related to rates of promotion and the extent to which women or men are able to move into those higher-paid positions. Again here, as in Alex's examples, if you keep track of how people are being promoted, then you're in a position to make proactive decisions about making sure that you are in fact promoting people who are performing equally well and who bring equal kinds of training and assets to the table. If you don't keep track, you're just not in a position to do anything about it. So there again, where the public sector has those policies in place and they're tracking that information, they're able to do a better job of providing a remedy for the gaps that are there. It's not perfect; otherwise, we would have no gap. I think that “sticky floor” is still an issue. I think the work-life balance is still an issue.
I would also say that we've seen some shifts in the last couple of years with the Public Sector Equitable Compensation Act and the changes to the legislation concerning federal contractors, which either have made it subject to market forces rates of pay or have made the implementation of pay equity policies a matter of discretion. There again, I don't think it's that anyone sets out to be a bad person. I think it's just that when we leave things up to people's discretion, as with the seat belts, sometimes we forget; whereas, if we have rules that say you have to think about this, you have to keep track, and you have to tell me what you did about it, then we see a more equitable workforce.