Shosh Vasserman Profile picture
IO economist + assistant prof at @StanfordGSB. I use theory + data to study how risk, commitment and information flows interplay with (good) policy design.
27 Jul
1/ Constructing the dashboard to explain our paper (reopenmappingproject.com) involved a lot of careful thinking about what info to display/emphasize and how. The goal of the app was to make the message, methods and results of our paper accessible. Thread👇 for more weeds.
2/ First, data limitations: we build contact matrices from Replica's synthetic population. This is amazing data (e.g. it lets us account for how long ppl spent in the same place) but:
3/ a) it is based on a "typical" day and has poor coverage of rare/big events like concerts; b) it is based on cell pings inside the cities and has poor coverage of travel + of kids; c) it uses Q1 of 2019 as a baseline + modifies based on policies as defined by us.
Read 17 tweets
9 Jun
Excited to tell you all about a new paper re COVID19 from a big team effort w/ @abhishekn, @akbarpour_, @Pietro_Tebaldi, @Simon_Mongey, Cody Cook, Aude Marzuoli, Matteo Saccarola and Hanbin Yang

reopenmappingproject.com/files/network-…
Tl;dr: Heterogeneity matters when thinking about lockdown/re-opening policies. Diffs in concentrations of places where ppl encounter each other, diffs in industry, demographic (and co-morbidity) distributions, diffs in when the virus hit.
These forms of heterogeneity are (largely) measurable -- and we made a major effort to measure them. We combine a representation of daily activities + meetings across metro areas built on rich cell data by Replica w/ electronic medical records, O*Net, OES + more
Read 13 tweets
23 Oct 19
Hey #econtwitter- I'm helping put together a tip sheet re computational tools for structural IO, including notes on when some languages/solvers are better than others. I don't use python for optimization but I know lots of ppl do. Any chance y'all could lend some tips? Example 👇
A few other things that it'd be great to have a 1-liner explaining (w/ links to more):
-How to evaluate trade-offs re Analytical Derivatives vs Numerical Differentiation vs Auto Differentiation
-When to impose optimizer constraints via transformation -- e.g., mapping [0,1] -> R
Here's my draft so far. Plz send more tips/correct any errors.
Read 5 tweets
22 Oct 19
Hello #econtwitter! The wonderful @SNageebAli + Greg Lewis + I have just posted our working paper.

scholar.harvard.edu/files/vasserma…

We would love your comments. Thread 👇
Motivation:

Policy debates re privacy on the internet often stress these trade-offs:
1) Firms getting user data -> better matches + service to larger market 👍
2) But lack of privacy is icky 👎
3) And facilitates "too much" price discrimination 👎

See obamawhitehouse.archives.gov/sites/default/…
Lots of responses:
Policy -- GDPR, CCPA, FCC "best practices", etc
Industry -- "privacy oriented" products by Apple, Mozilla, etc.
Academics -- budding theoretical literature on privacy + value of data; small but growing empirical lit (eg this from NBERSI )
Read 17 tweets