As many of you know, the organization that I have been associated for the last 9 years, marketumbrella.org has been doing some very interesting data collection and measurement on markets in this area. Using trust as a proxy, NEED (Neighborhood Exchange Evaluation Device) has been measuring the quantity and quality of transactions and hopes to get an online tool (like the free SEED tool) up very soon.

When we started this project almost 4 years ago, only a handful of stakeholders understood why we were interested in this. Now of course, interest in bridging and bonding has grown exponentially, as has the interest in markets ability to manage that effort.
This article is another in a long line of studies of social cohesion, but is a good primer for anyone in your world who needs to understand how this can be seen as healthy behavior.

In a now-classic study of 6,928 adults living in Alameda County, Calif., conducted by Harvard researcher Lisa Berkman, PhD, and University of California, Berkeley, researcher S. Leonard Syme, PhD., people with few social ties were two to three times more likely to die of all causes than people with wider and closer relationships.