What is the relationship between 'Jonathan Levin' and 'Stanford University' in the context of the input sentence.
Options: location of formation, original broadcaster, employer, publisher

An NBER working paper from 2013 by Liran Einav, Chiara Farronato and Jonathan Levin of Stanford University and Neel Sundaresan of eBay Research Labs tries to work out why auctions have fallen out of favour.
employer