The evolution of trust(worthiness) in the net

The main results of our indirect evolutionary approach to trust in large interactions suggest that trsutworthiness must be detectable if good conduct in trust-relationships is to survive. According to theoretical reasoning there is a niche then for an organization offering a possibly costly service of keeping track of the conduct of participants on the net. We compare traits of an organizational design as suggested by economic reasoning with those that actually emerged and ask wether institutions like eBay will increasingly have to "economize on virtue" although so far they could rely on its spontaneous provision.