Peter Deffebach
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macrodev.bsky.social
Peter Deffebach
@macrodev.bsky.social
Development / Urban / Macro economist at BU. On the 24-25 Job Market

https://pdeffebach.github.io/
Reposted by Peter Deffebach
#QJE Nov 2025, #1, “The Economics of Spatial Mobility: Theory and Evidence Using Smartphone Data,” by Miyauchi, Nakajima, and Redding (@reddingecon.bsky.social): doi.org/10.1093/qje/...
The Economics of Spatial Mobility: Theory and Evidence Using Smartphone Data*
ABSTRACT. We develop a tractable quantitative framework for modeling the rich patterns of spatial mobility observed in smartphone data. We show that travel
doi.org
October 12, 2025 at 12:30 AM
True, but on the other hand I like to be able to ctrl-f for the exact number written in the text in order to find a table.
May 11, 2025 at 8:19 PM
this paper is nice www.nber.org/papers/w32124

> we propose a methodology that only reports decimal digits in a parameter estimate that reject a hypothesis of statistical equivalence.
Credible Numbers: A Procedure for Reporting Statistical Precision in Parameter Estimates
Founded in 1920, the NBER is a private, non-profit, non-partisan organization dedicated to conducting economic research and to disseminating research findings among academics, public policy makers, an...
www.nber.org
May 11, 2025 at 8:01 PM
This means that for other procedural things, like how voting is done, how bills get sent to the floor, etc, the mayor can weigh in and break ties?
January 2, 2025 at 10:11 PM
Reposted by Peter Deffebach
h) Miyauchi, @ecmaeditors.bsky.social. Using Japanese firm‐to‐firm transactions panel data, shows rematching following unexpected supplier bankruptcy improves with spatial density of alternative suppliers; this can account for big share of agglomeration benefits t.ly/0TTgV
Matching and Agglomeration: Theory and Evidence from Japanese Firm-to-Firm Trade - The Econometric Society
t.ly
December 27, 2024 at 4:23 PM
Thanks! Hope they can come to an agreement. I've been worried there will be lots of tenuous procedural disputes in the opening months
January 2, 2025 at 8:55 PM
Wait, so Portland created a 12 person council, but the charter didn't explicitly outline how to deal with ties?
January 2, 2025 at 8:51 PM
Yes that is a good example. Hard to do these specialized joins outside of SQL.

Ultimately, I'm not sure what I want, tbh. I kind of *want* a big binary blob of files that's managed exclusively by a database, but I also want to be able to inspect particular parquet files. It's a trade-off.
December 20, 2024 at 4:57 PM
So aside from data integrity things (ensuring a structure, matches work seamlessly), it's not obvious how a SQL workflow is good when data is local.
December 20, 2024 at 4:14 PM
The main problem I have is that our workflow is having a big Dropbox folder holding the data, and a separate git repo with all the code. That is, the data is local.

The main drawback to me is that an SQL database, when local, is just some big binary blog on your hard drive? Seems kind of opaque.
December 20, 2024 at 4:14 PM
I'm still not sure I understand the benefits.

Is it that the WHERE commands are so intuitive in SQL? I could do a similar query very easily in dplyr.

Is it the size of the data? I could use feather in R or just work on the cluster.
December 20, 2024 at 4:14 PM
Honestly that would make a current workflow I use so much better... maybe for the next project.
December 20, 2024 at 12:44 AM
Or, rather, what econ data sets do I not have access to by not using databases.
December 19, 2024 at 10:27 PM
I wouldn't mind this, but only as a way to motivate the use of SQL tools in econ. I've never used SQL (and it's probably hurting me on the industry market) because I've never seen a reason to. Would be nice to see a scenario where there's actually an advantage.
December 19, 2024 at 10:26 PM