Benefit of a company sports team

Posting here as I am looking for as close to a factual answer as possible (rather than a debate on whether or not you like it).

I am trying to work on publicity to get more people to take up sport.

My wild arse contention, that I am looking for a study to support, is that those companies who participate in an employee or inter company sports league exhibit benefits such as [ul]
[li]less employee turnover[/li][li]better work satisfaction[/li][li]more teamwork / less HR complaints[/li][/ul]

What I need help with is a good source to such a study, is there any proof for this contention?

I have no cites for yui. but I’m gonna bet it’s going to be very hard to separate cause from effect. IOW to determine which way the causation runs.

Do they have better job satisfaction because of sports, or do they have sports because companies with better job satisfaction have the morale necessary to sustain participation in sports?

Or are both simply caused by a company which demands that no salaried worker ever *exceed *40 hours of work in any week? Thereby leaving time in the day for both life satisfaction *and *sports?

How about the exercise angle? Have there been studies on whether competetors in company leagues get more exercise than those that don’t (altho again it could be cause and effect.)

(On the other hand it could be that competitors get less exercise than those that can and choose not to, because the healthy non-players might choose to work out or run instead of playing softball and therefore get more rigorous exercise. Or not, I don’t know.)

I don’t know to either guys - just trying to find if there is any sort of casual link at all - and I think that cause / effect will be very intertwined anyway in some sort of positive feedback loop