"Effects of an Acute Care for Elders Unit on Costs and 30-Day Readmissions"
JAMA IM April 22
http://archinte.jamanetwork.com/article.aspx?articleid=1680136 
"Participants  Hospitalists' patients aged 70 years or older spending the entirety of their hospitalization in either the ACE or UC unit in fiscal year 2010."
"Conclusions and Relevance  The ACE unit team model reduces costs and 30-day readmissions. In an era when improving care processes while reducing costs is a vital objective for the Medicare program and our nation as a whole, the ACE model meets these goals."