Hi #EconTwitter! This is my JMP 🧵
🚨 Is lax merger policy bad for innovation? 🚨
I have a natural experiment on a relaxation of pre-merger notification rules. (Spoiler Alert) Horizontal mergers lead to 30% less innovation when they are not notified!
1/8
Can you trust markup estimates?
Yes, you can!
You just need to follow "The Hitchhiker’s Guide to Markup Estimation" w/ @DeRidderMaarten (@LSEEcon) & @Basile_G (@Unibocconi)
Are firm-level markup estimates unreliable?
They are much better than you may think!
Estimated markups correlate highly with true markups
🚨 "The Hitchhiker’s Guide to Markup Estimation" w/ @DeRidderMaarten (@LSEEcon) & @MorzentiG (@Unibocconi)
https://t.co/vJoPL5KBKY
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