Greg Shill
@gregshill.com
Professor of Law at Arizona State University • Student of firms, cities & transportation (and Seinfeld) • Papers: ssrn.com/author=887547 • Newsletter: gregshill.substack.com • Cohost, Densely Speaking podcast http://www.denselyspeaking.com/ • gregshill.com
Pinned
Greg Shill
@gregshill.com
· Apr 28
I’m thrilled to be joining the next edition of Local Government Law as a co-author. Very much looking forward to working with Lynn Baker, Clay Gillette, David Schleicher, and (also new to this edition) Nadav Shoked, all of whose work has shaped how so many of us think about the field.
Your 40s are for discovering that most structural forces are actually three guys in a trench coat with 6x leverage.
Your 20s are for believing everything is structural and your 30s are for learning that actually it's often just some guy or small group of guys (gender neutral)
September 16, 2026 at 3:36 AM
Your 40s are for discovering that most structural forces are actually three guys in a trench coat with 6x leverage.
When you learn that Bill Fischel has posted a draft of his next local government magnum opus, about counties:
“The Origins of American Counties: A Fifty-State Tour of the History and Perseverance of America’s Least Understood Local Governments”
bpb-us-e1.wpmucdn.com/sites.dartmo...
“The Origins of American Counties: A Fifty-State Tour of the History and Perseverance of America’s Least Understood Local Governments”
bpb-us-e1.wpmucdn.com/sites.dartmo...
Seinfeld Celebration
ALT: Seinfeld Celebration
static.klipy.com
September 16, 2026 at 2:51 AM
When you learn that Bill Fischel has posted a draft of his next local government magnum opus, about counties:
“The Origins of American Counties: A Fifty-State Tour of the History and Perseverance of America’s Least Understood Local Governments”
bpb-us-e1.wpmucdn.com/sites.dartmo...
“The Origins of American Counties: A Fifty-State Tour of the History and Perseverance of America’s Least Understood Local Governments”
bpb-us-e1.wpmucdn.com/sites.dartmo...
DSGE models rule everything around me.
(dynamic stochastic general equilibrium)
(dynamic stochastic general equilibrium)
This happens every time, folks. I wrote this a couple years ago.
Too many traffic engineers just do not understand that people can (and do!) change their travel decisions when highway is added or taken away.
Too many traffic engineers just do not understand that people can (and do!) change their travel decisions when highway is added or taken away.
What Will Happen to Traffic in the Wake of the Baltimore Bridge Collapse?
People are surprisingly good at adjusting when a road closes.
slate.com
September 15, 2026 at 7:29 PM
DSGE models rule everything around me.
(dynamic stochastic general equilibrium)
(dynamic stochastic general equilibrium)
US vs. European wealth composition, top 10%.
TLDR, Americans own a lot of stocks whereas Euros own property. Caveat: this understates pensions, but still captures big picture equity mix.
Data is from 2023 based on ECB report QT’d👇 (pp. 101 & 104), which I prompted ChatGPT to chart more legibly.
TLDR, Americans own a lot of stocks whereas Euros own property. Caveat: this understates pensions, but still captures big picture equity mix.
Data is from 2023 based on ECB report QT’d👇 (pp. 101 & 104), which I prompted ChatGPT to chart more legibly.
September 15, 2026 at 4:29 PM
US vs. European wealth composition, top 10%.
TLDR, Americans own a lot of stocks whereas Euros own property. Caveat: this understates pensions, but still captures big picture equity mix.
Data is from 2023 based on ECB report QT’d👇 (pp. 101 & 104), which I prompted ChatGPT to chart more legibly.
TLDR, Americans own a lot of stocks whereas Euros own property. Caveat: this understates pensions, but still captures big picture equity mix.
Data is from 2023 based on ECB report QT’d👇 (pp. 101 & 104), which I prompted ChatGPT to chart more legibly.
The “Europoor” meme is really a comment about wealth composition, not income or levels. “In the United States, the wealth at the top of the distribution is largely held in business and financial
assets, such as [stocks], and less in housing than in the euro area.” www.ecb.europa.eu/pub/pdf/ecbu...
assets, such as [stocks], and less in housing than in the euro area.” www.ecb.europa.eu/pub/pdf/ecbu...
September 15, 2026 at 4:19 PM
The “Europoor” meme is really a comment about wealth composition, not income or levels. “In the United States, the wealth at the top of the distribution is largely held in business and financial
assets, such as [stocks], and less in housing than in the euro area.” www.ecb.europa.eu/pub/pdf/ecbu...
assets, such as [stocks], and less in housing than in the euro area.” www.ecb.europa.eu/pub/pdf/ecbu...
Reposted by Greg Shill
Who is rich in America, and why?
A review of “The Everywhere Millionaire” by Zidar and Zwick
paulgp.substack.com
September 15, 2026 at 2:34 PM
Reposted by Greg Shill
❗New Article❗ The Great American Property Tax Freakout! Since 2024, many states have radically reshaped their property tax systems.The changes are an example of a national trend of carving out influential groups from taxation, in this case a majority group: homeowners papers.ssrn.com/sol3/papers....
The Great American Property Tax Freak Out
There has been a lot of news over the last two years, so it is understandable that neither the mass media nor the legal academy has focused on what is happening
papers.ssrn.com
September 15, 2026 at 12:13 PM
❗New Article❗ The Great American Property Tax Freakout! Since 2024, many states have radically reshaped their property tax systems.The changes are an example of a national trend of carving out influential groups from taxation, in this case a majority group: homeowners papers.ssrn.com/sol3/papers....
Pretty grim that investment advice seamlessly transitioned years ago from recommending substantial allocations to *individual bonds* to recommending *bond funds*, as if they’re just a bunch of bonds bundled together. Here’s the performance of the leading bond ETF during its 20-year life.
September 15, 2026 at 4:55 AM
Pretty grim that investment advice seamlessly transitioned years ago from recommending substantial allocations to *individual bonds* to recommending *bond funds*, as if they’re just a bunch of bonds bundled together. Here’s the performance of the leading bond ETF during its 20-year life.
Reposted by Greg Shill
Spatial-equilibrium modelling now works directly in your browser. Choose a city, draw a policy on the map, and see results by grid cell in near real time. Here is a stylised Crossrail experiment in London. 🧵
sites.google.com/view/ahlfeld...
sites.google.com/view/ahlfeld...
September 13, 2026 at 4:27 PM
Spatial-equilibrium modelling now works directly in your browser. Choose a city, draw a policy on the map, and see results by grid cell in near real time. Here is a stylised Crossrail experiment in London. 🧵
sites.google.com/view/ahlfeld...
sites.google.com/view/ahlfeld...
Old enough to remember not just Abandon Biden/Harris and the Johnson and Stein campaigns (supposedly the big Libertarian and Green moments, respectively), but the 2000 Nader campaign. A girl I went to college with voted absentee for him—in Florida. I don’t think she liked the next eight years. Ymmv.
It’s like clockwork: three months before a critical election, people start up with the “don’t for Dems! Teach them a lesson by NOT voting” lunacy.
She's correct, and some people can think further than the next midterm election or the next quarterly profit to identify the path which our country has been on and correctly state that voting for the lesser of two evils is still voting for an evil which will further your own demise.
September 12, 2026 at 9:20 PM
Old enough to remember not just Abandon Biden/Harris and the Johnson and Stein campaigns (supposedly the big Libertarian and Green moments, respectively), but the 2000 Nader campaign. A girl I went to college with voted absentee for him—in Florida. I don’t think she liked the next eight years. Ymmv.
Reposted by Greg Shill
The Abundance Law Society recently held its first event at the Sandra Day O’Connor College of Law at Arizona State University with Professor @gregshill.com.
Abundance can be an abstract concept, so Professor Shill approached it through the concrete example of transportation. Thank you, attendees!
Abundance can be an abstract concept, so Professor Shill approached it through the concrete example of transportation. Thank you, attendees!
September 11, 2026 at 9:32 PM
The Abundance Law Society recently held its first event at the Sandra Day O’Connor College of Law at Arizona State University with Professor @gregshill.com.
Abundance can be an abstract concept, so Professor Shill approached it through the concrete example of transportation. Thank you, attendees!
Abundance can be an abstract concept, so Professor Shill approached it through the concrete example of transportation. Thank you, attendees!
Reposted by Greg Shill
The National Highway Traffic Safety Administration is currently accepting comments on its Automated Vehicle Framework: www.regulations.gov/document/NHT...
Comments are due Sept. 30th
Some good comments from @nacto.bsky.social @saferoadsnow.bsky.social and others are in already
Comments are due Sept. 30th
Some good comments from @nacto.bsky.social @saferoadsnow.bsky.social and others are in already
Regulations.gov
www.regulations.gov
September 11, 2026 at 2:25 PM
The National Highway Traffic Safety Administration is currently accepting comments on its Automated Vehicle Framework: www.regulations.gov/document/NHT...
Comments are due Sept. 30th
Some good comments from @nacto.bsky.social @saferoadsnow.bsky.social and others are in already
Comments are due Sept. 30th
Some good comments from @nacto.bsky.social @saferoadsnow.bsky.social and others are in already
Reposted by Greg Shill
Metro Seattle transit FTW! Key elements:
- Relentless focus on bus speed + reliability incl RapidRide
- Link Line 2
- Line 2 connects to Bellevue and Redmond, where massive ped-oriented growth near stations drove bi-directional ridership
More at @theurbanist.org
www.theurbanist.org/how-downtown...
- Relentless focus on bus speed + reliability incl RapidRide
- Link Line 2
- Line 2 connects to Bellevue and Redmond, where massive ped-oriented growth near stations drove bi-directional ridership
More at @theurbanist.org
www.theurbanist.org/how-downtown...
September 10, 2026 at 3:25 PM
Metro Seattle transit FTW! Key elements:
- Relentless focus on bus speed + reliability incl RapidRide
- Link Line 2
- Line 2 connects to Bellevue and Redmond, where massive ped-oriented growth near stations drove bi-directional ridership
More at @theurbanist.org
www.theurbanist.org/how-downtown...
- Relentless focus on bus speed + reliability incl RapidRide
- Link Line 2
- Line 2 connects to Bellevue and Redmond, where massive ped-oriented growth near stations drove bi-directional ridership
More at @theurbanist.org
www.theurbanist.org/how-downtown...
When you're solo, the solution is straightforward (noise canceling headphones). But that doesn't work while traveling with family or friends, and it's another small thing making transit more unpleasant relative to car travel.
ETA measured that on a 40 minutes trip from one end of the 7 train to another, nearly a full 25% of the time was filled by announcements.
That makes it hard to talk with traveling companions, read a book, or even just travel in solitude.
That makes it hard to talk with traveling companions, read a book, or even just travel in solitude.
September 9, 2026 at 7:03 PM
When you're solo, the solution is straightforward (noise canceling headphones). But that doesn't work while traveling with family or friends, and it's another small thing making transit more unpleasant relative to car travel.
Have now tested this at two airports in person and gotten reports from friends at a few more. It’s good! Way better than what’s offered by the airports themselves, the airlines, and third party sites, IMO. Credit to ChatGPT for all the heavy lifting.
✈️ If you’re flying today, try airportwtf.com at the airport and let me know what’s missing! I’ve rolled out several updates to this l’il side project since deploying it Friday. The idea is to give flyers the info they actually want (which I find existing airport maps don’t). Feedback invited.
Airport Food Maps, Coffee & Lounges | Airport WTF
Find food, coffee, bathrooms, airport lounges, and more near your gate at 50 U.S. airports. Browse airport and terminal maps.
airportwtf.com
September 9, 2026 at 12:44 AM
Have now tested this at two airports in person and gotten reports from friends at a few more. It’s good! Way better than what’s offered by the airports themselves, the airlines, and third party sites, IMO. Credit to ChatGPT for all the heavy lifting.
✈️ If you’re flying today, try airportwtf.com at the airport and let me know what’s missing! I’ve rolled out several updates to this l’il side project since deploying it Friday. The idea is to give flyers the info they actually want (which I find existing airport maps don’t). Feedback invited.
Airport Food Maps, Coffee & Lounges | Airport WTF
Find food, coffee, bathrooms, airport lounges, and more near your gate at 50 U.S. airports. Browse airport and terminal maps.
airportwtf.com
September 7, 2026 at 4:55 PM
✈️ If you’re flying today, try airportwtf.com at the airport and let me know what’s missing! I’ve rolled out several updates to this l’il side project since deploying it Friday. The idea is to give flyers the info they actually want (which I find existing airport maps don’t). Feedback invited.
“Midwest beach city” is a thing people are saying more and more. www.ft.com/content/7c71...
How Chicago became America’s most surprising beach city
The FT’s architecture critic finds the city’s long lakefront a masterclass in urban planning, with sandy shorelines and remarkable buildings
www.ft.com
September 6, 2026 at 7:30 PM
“Midwest beach city” is a thing people are saying more and more. www.ft.com/content/7c71...
It’s Richard Scarry’s world, we’re just living in it.
I've seen bikes on buses and trains on boats, but never planes on trains
September 6, 2026 at 12:36 AM
It’s Richard Scarry’s world, we’re just living in it.
Made some big updates. It’s been gratifying to hear from some folks that it’s been useful (and where it could be more so). Hope this new version is helpful! airportwtf.com ps keep the feedback flowing
September 5, 2026 at 1:31 PM
Made some big updates. It’s been gratifying to hear from some folks that it’s been useful (and where it could be more so). Hope this new version is helpful! airportwtf.com ps keep the feedback flowing
Reposted by Greg Shill
People with JDs can be president but the president cannot be, in the essential sense, a lawyer. For proof, consider that the last one of those was Nixon.
September 4, 2026 at 5:34 PM
People with JDs can be president but the president cannot be, in the essential sense, a lawyer. For proof, consider that the last one of those was Nixon.
Reposted by Greg Shill
This is great!
An amazing tool when you find yourself in an airport you don't know and don't want to deal with the awful online guides of most airports.
Well done!
An amazing tool when you find yourself in an airport you don't know and don't want to deal with the awful online guides of most airports.
Well done!
✈️ Traveling this weekend? I created a tool to make your airport time less annoying. Would love feedback.
airportwtf.com
airportwtf.com
Airport WTF
Find food, coffee, bathrooms, and airport lounges near your gate at the 50 busiest U.S. airports.
airportwtf.com
September 4, 2026 at 5:26 PM
This is great!
An amazing tool when you find yourself in an airport you don't know and don't want to deal with the awful online guides of most airports.
Well done!
An amazing tool when you find yourself in an airport you don't know and don't want to deal with the awful online guides of most airports.
Well done!
✈️ Traveling this weekend? I created a tool to make your airport time less annoying. Would love feedback.
airportwtf.com
airportwtf.com
Airport WTF
Find food, coffee, bathrooms, and airport lounges near your gate at the 50 busiest U.S. airports.
airportwtf.com
September 4, 2026 at 1:52 PM
✈️ Traveling this weekend? I created a tool to make your airport time less annoying. Would love feedback.
airportwtf.com
airportwtf.com
Ran out of tokens twice today on a side project. Woof.
September 4, 2026 at 5:05 AM
Ran out of tokens twice today on a side project. Woof.
Reposted by Greg Shill
What’s the value of a compact city? How would we know? Check out our latest Densely Speaking interview with the great Nina Harari 👇
🚨 New Densely Speaking pod!
@jeffrlin.bsky.social and I interview Wharton economist
Mariaflavia Harari, author of "Cities in Bad Shape: Urban Geometry in India." I learned so much from this very fun conversation.
Spotify: open.spotify.com/episode/6TgG...
Apple: podcasts.apple.com/us/podcast/c...
@jeffrlin.bsky.social and I interview Wharton economist
Mariaflavia Harari, author of "Cities in Bad Shape: Urban Geometry in India." I learned so much from this very fun conversation.
Spotify: open.spotify.com/episode/6TgG...
Apple: podcasts.apple.com/us/podcast/c...
S5E2 - Cities in Bad Shape: Urban Geometry in India (Mariaflavia Harari)
Densely Speaking · Episode
open.spotify.com
September 3, 2026 at 9:28 PM
What’s the value of a compact city? How would we know? Check out our latest Densely Speaking interview with the great Nina Harari 👇
Adventures in non-linearity, aka it's lonely at the top.
As a large airport, for example, Dulles is tiny; 1/3 the passengers of Denver, barely more than SLC and San Diego. en.wikipedia.org/wiki/List_of...
As a large airport, for example, Dulles is tiny; 1/3 the passengers of Denver, barely more than SLC and San Diego. en.wikipedia.org/wiki/List_of...
List of the busiest airports in the United States - Wikipedia
en.wikipedia.org
September 2, 2026 at 8:42 PM
Adventures in non-linearity, aka it's lonely at the top.
As a large airport, for example, Dulles is tiny; 1/3 the passengers of Denver, barely more than SLC and San Diego. en.wikipedia.org/wiki/List_of...
As a large airport, for example, Dulles is tiny; 1/3 the passengers of Denver, barely more than SLC and San Diego. en.wikipedia.org/wiki/List_of...