bloomberg.com/view/articles/…
We'll start with Gutierrez and Philippon (2016).
pages.stern.nyu.edu/~tphilipp/pape…
This paper asks why companies are investing less. The authors conclude that market concentration is a big factor.
![](https://pbs.twimg.com/media/DmRgcVLV4AAd9QD.jpg)
janeeckhout.com/wp-content/upl… …
They document increasing price markups, and claim that this can explain a number of negative economic trends that have emerged in recent years.
![](https://pbs.twimg.com/media/DmRhCKBUwAAhFNw.jpg)
economics.mit.edu/files/12544
These economists document rising industrial concentration, and link it to falling labor share within various industries.
![](https://pbs.twimg.com/media/DmRiN_5UwAEyZWd.jpg)
home.uchicago.edu/~barkai/doc/Ba…
He attributes this to decreased competition.
![](https://pbs.twimg.com/media/DmRjdaLUwAA676H.jpg)
kellogg.northwestern.edu/faculty/benmel…
![](https://pbs.twimg.com/media/DmRj4j6U8AAYdFw.jpg)
marinescu.eu/AzarMarinescuS…
![](https://pbs.twimg.com/media/DmRki4fUwAMvPHt.jpg)
healthcarepricingproject.org/sites/default/…
![](https://pbs.twimg.com/media/DmRk6kkU0AACscT.jpg)
federalreserve.gov/econresdata/fe…
![](https://pbs.twimg.com/media/DmRlXLVU4AAbRy_.jpg)
chrisedmond.net/Edmond%20Midri…
![](https://pbs.twimg.com/media/DmRlyurVsAA7FZc.jpg)
papers.ssrn.com/sol3/papers.cf…
![](https://pbs.twimg.com/media/DmRmS_0V4AEgJsN.jpg)
IO, remember, is the branch of econ whose job it is to study competition. So where are the papers?
economics.mit.edu/files/5566
![](https://pbs.twimg.com/media/DmRnehOUYAAxYCD.jpg)
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