While there are some sources for "cold hard facts," I believe many of them are really subject to fuzzy interpretation. Also, the quality of the surveys or other evaluation methods is sometimes very questionable.

More important, I would comment that when management wants those facts, it may not make any difference even if you get them. The fact that part-time work - which certainly isn't new, radical or unproven - isn't accepted means that telecommuting probably has about zero chance. Even if you came up with the facts they'd find some other obstacle.

The underlying problem is probably something to do with fear of loss of control, and mistrust of employees by managers. I hate to make such a blanket statement, but I've seen this picture too many times.

My advice is to do the following:

Try to come up with a convincing argument about how telecommuting will help the company - NOT the employees.

Try to get approval for one or two people to telecommute only one day a week for one month. If you can't get that mini-trial approved, then all the data in the world won't make any difference.