Best of #econtwitter - Week of February 21, 2021 [2/2]
Welcome readers old and new to this week’s edition of Best of Econtwitter. Thanks to those sharing suggestions, over email or on Twitter @just_economics.
This is part two of two; part one is here.
Paper summary threads
A recent paper about innovation over the long run reveals a very neat snapshot of the composition of inventions over time. Using data on US patents, it identifies the following key waves: nber.org/system/files/w…
Some important new points from & on AI and development: 1. Big difference between looking at impacts of AI within a country & globally. When benefits accrue in one country & costs in another, need winners to compensate losers across borders
Labor-saving advances in AI may undo gains from globalization of developing countries and pose new challenges for economic development, from @akorinek and @JosephEStiglitz https://t.co/OF835fzbeq https://t.co/TSLmys2nih
Nine credible studies looked at what happened to test scores when capital spending increased for K12 public schools. Most found nothing at first. Only two found stat sig impacts after a few years (left). But *on average* looks like a compelling increase over time (right).
Interesting paper from Greg Clark and Neil Cummins arguing for a null effect and widespread publication bias in the literature on compulsory schooling impacts on health and income lse.ac.uk/Economic-Histo… Wish they had a better income measure than house prices though.
We say "Teachers are the largest school-based factor influencing student achievement" What if we're wrong? New report by shows principals have large direct effects for more kids + indirect effects. wallacefoundation.org/knowledge-cent…
Very interesting paper looking at national identity. 👉Alsace-Lorraine regions were contested between 🇫🇷 & 🇩🇪 👉 Both countries repressed regional identities 👉 Regional identities got stronger afterwards by & forthcoming papers.ssrn.com/sol3/papers.cf…
NEW PAPER "Measuring Misperceptions?" The one-word answer is "no." There is a substantial gap between the beliefs researchers describe and the beliefs surveys measure. Paper: m-graham.com/papers/Graham_… Presenting today (Tu 2/17) at 2 pm eastern: jawspolisci.network [1/n]
How much are markets likely to self-correct after an otherwise anticompetitive merger? I address this in a new working paper with wunderkind Peter Caradonna and frequent coauthor : “Mergers, Entry, and Consumer Welfare” papers.ssrn.com/sol3/papers.cf… (1/N)
1/ Tobacco & oil firms famously foment doubt about the harmful impact of their actions. In a new pub in w/ we show people do the same: they justify selfishness by "casting doubt” on its impact, reducing others' prosociality: bit.ly/3jYHdnh Thread
My paper "Efficiency in search & matching models: A generalized Hosios condition" is now published in JET. The main result applies to any market with frictional meeting process, but it’s particularly relevant for macroeconomists who study unemployment. authors.elsevier.com/a/1cW7w50waSOD3
Using Medicare claims data on heart attack outcomes, I find shrinkage measures create big, hidden, performance "taxes". For hospital heart attack mortality measures, the tax is about 40% on average. For smaller hospitals in the bottom size quintile, the tax is ~80%. (6/11)
🚨 New paper in press @ JESP 🚨 With ⬆️ racial diversity one might expect ⬆️ interactions btw White and non-White Americans Instead we find that ⬆️ racial diversity prompt White Americans to structure environments to ⬇️ contact with non-White others 1/ psyarxiv.com/yzpr2
Lots of observational studies find that granting land tenure to farmers has big impacts on investment. That's NOT what Heather Huntington and I find in our large randomized controlled trial (forthcoming JDE doi.org/10.1016/j.jdev… ).
Just posted a new (short) working paper! It’s on the interpretation of "marginal outcome tests" for racial bias, as recently popularized by Arnold et al. (2018) and others bit.ly/2ZbijY4 Here's a quick summary thread 👇
Something I'd like to understand better: This far into the pandemic, I'm surprised not to be seeing big Slacks organized around research topics. What I have in mind is a substitute for conference or department hallway talk - the same in some respects, different in others. 1/
Some good innovation here
New submission option! You may now elect to expedite the editorial process at the JIE using our Prior Review Process. Along with your paper, submit the decision letter and referee reports from a top-5 journal by choosing "PRP" in the Article Type Menu. https://t.co/4ZSrlTiwhA
Journal of International Economics @JIntlEcon
hivemind: what are your favorite papers combining “causal” micro estimates (say from DiD or RCT) with a general-equilibrium macro model to answer an interesting macro question? This is for my PhD teaching so the easier to read the better. Thanks in advance!