lately there's been a big push in the US government for an increase in teleworking. if you need specific examples, a 2010 telework report is available on this page: http://www.telework.gov/. There may be other public studies too with some hard data in them.
full disclosure: i work at www.lifesize.com and we do eat our own dog food. One of my team members has been working remotely in another state for several months and many of our team often work from home.
There's also a white paper linked on this page http://www.lifesize.com/Industry_Solutions/Government_Soluti... (but you have to register for it.)
full disclosure: i work at www.lifesize.com and we do eat our own dog food. One of my team members has been working remotely in another state for several months and many of our team often work from home.