@YaleSOM professor & Bulls fan. I study consumer finance, and econometrics is a big part of my research identity. @sgil1122’s life-partner. He/him/his
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I try to understand how the credibility revolution (as termed by @metrics52 and @PinkseJoris) has permeated economics, especially across different fields. 
What is a diffusion model? It's a way to study how things spread through a network. For example, how a disease spreads through a population, or how information spreads through a social network.
Following the collapse of SVB, there an immediate response in the stock market. Many banks other than SVB plunged (most notably First Republic Bank, who finally failed many weeks later). Overall, the bank sector corrected sharply downward. 
What is distinctive is how much the size of the banks failing has changed, even when adjusting for inflation. The total assets is swamped by the size of the crisis in 2008, but even just looking at the average size banks that fail, it is striking: 
We have:
From the blog: 
2/ A popular commentary on the Covid crisis has been how much higher the Covid death toll has been in Republican vs. Democratic counties in the U.S. 
Two children and a pandemic later
In the new appendix, we discuss four examples of DiD and how our main proposition nests these cases. 
@instrumenthull gave the best answer to this, and let me try to explain why. 
But those are the averages. What's the share that's above 10k? (This is the Biden current cutoff for debt forgiveness, so a useful benchmark). 
The study used videos of physicians (42 of them!) to try to educate participants on the symptoms of covid and appropriate health-preserving behaviors. We found that watching these videos improved participants knowledge! 
For graduate school, Henry and I were both in Cambridge (he was at MIT, I was at Harvard), while Isaac was at Michigan. All three of us were the same year at Swarthmore, and took most of the same classes together there.
