Best of #econtwitter - JMPs 2022 special edition, part eight
If your thread (or your student’s, or your colleague’s) is missing below, submissions are as always extremely welcome.
Previously: 2022 JMPs part one, part two, part three, part four, part five, part six, part seven. Editions from prior years are here.
As written last year: Plausibly these JMP editions have the highest densities of good content of all the newsletters. These are presented in even less of a sense of any order than usual.
Job market papers
![Twitter avatar for @MorzentiG](https://substackcdn.com/image/twitter_name/w_96/MorzentiG.jpg)
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
![Image](https://substackcdn.com/image/fetch/w_600,c_limit,f_auto,q_auto:good,fl_progressive:steep/https%3A%2F%2Fpbs.substack.com%2Fmedia%2FFibBhmxX0AAS7WM.png)
![Twitter avatar for @chiaraina](https://substackcdn.com/image/twitter_name/w_96/chiaraina.jpg)
Hi #EconTwitter! I am on the #EconJobMarket this year with a paper titled “Tailored Stories.” But what is a tailored story?
Here is a perfect example:
1/
![Twitter avatar for @RuoziSong](https://substackcdn.com/image/twitter_name/w_96/RuoziSong.jpg)
Summary of my #EconJMP: 🧵(1/12) #EconTwitter
How firms in the same industry differ in production/emission behaviors is well-documented.
But should local firm heterogeneity matter to welfare-maximizing regulators when designing environmental regulations at an aggregate level?