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So I was waiting for @nberpubs to tweet this out last week (which happened Friday pm). Anyway, here is my paper with @msinkinson and Matt Backus. This is the #commonwnership thread for RTE Cereal. 1/11
chrisconlon.github.io/site/bcs_cerea…
chrisconlon.github.io/site/bcs_cerea…
The reason we chose cereal (besides the obvious: that's what IO economists do) is that there is a lot of variation in the degree of common ownership across firms and over time. 2/11 
For example Kellogg's is 20% owned by a family foundation and is basically indifferent to competitor's profits (weight < 0.2), and should be a strong competitor (turns out it is a high price, high margin firm). Common ownership can be highly asymmetric. (GIS weights KEL ~0.5) 3/
