Reading Notes on Dasgupta, "Economics: A Very Short Introduction": Communities

Suppose that we have the norm (or the strategy) that a failure to share in any case leads to the end of the sharing relationship forever. How much of a large-scale social distribution of labor can be supported by tied engagements of this type?

What are the advantages to having an economic network built out of "weak ties"?

What are the difficulties in creating and maintaining an economic network built out of "weak ties"?