The authors are curious to hear from people who are Sunstein 3s and 4s as they stopped short of collecting that information given the tremendous amount of resources required to do so. Since many Sunstein 1s and 2s (and likely 3s and 4s) are ELS Blog readers, feel free to email the authors with any relevant information/corrections/additions.
The Abstract of the Paper is below the fold:
Degrees of separation is a concept that is intuitive and appealing in popular culture as well as academic discourse: It tells us something about the connectedness of a particular field. It also reveals paths of influence and access. Paul Erdős was the Kevin Bacon of his field - math - coauthoring with a large number of scholars from many institutions and across subfields. Moreover, his work was highly cited and important. Mathematicians talk about their Erdős number (i.e., numbers of degrees of separation) as a sign of their connection to the hub of mathematics: An Erdős number of 2 means a scholar did not co-author with Erdős but did collaborate with someone who did (i.e., an Erdős 1). In this study, we examine collaboration networks in law, searching for the Legal Erdős. We crown Sunstein as the Legal Erdős and name a complete (as possible) list of Sunstein 1s and 2s.