Arpit Gupta

I'm teaching a new course at Stern on AI in Finance and opening it up! Syllabus/slides on Github: github.com/arpitrage/ai-i… Weekly summaries on Substack arpitrage.substack.com/p/1-three-rule… First post is on Amdahl's Law, Jevons' Paradox, and why finance was slow to learn the bitter lesson

@avzaagzonunaada I believe Gonds also practice similar marriage patterns; and this has been a basis for calling it “Dravidian.” Brahui do not I think

@AzizSunderji From 2020 until when?

Latest Census estimates show how much we have seen suburbanization (and exurbanization) across metropolitan areas in the last five years. Remote work has been a big driver of this trend, while Seattle remains a bit of an exception.

@LevyAntoine Antoine: the rent is too **** low

This is a really important fact, common to many major cities, which I discussed with L’Express for the cases of Paris and NYC recently. Most people in these places do not pay market rents, and while potentially providing valuable insurance, that’s a contributor to the housing shortage.

@VitalCityNYC Robotaxi access might make it easier to get superspeeders off the road, which would have disproportionate safety benefits, but I'm not holding my breath

Interesting. It's also true that if self-driving taxis were only allowed in NYC on the margins, which is probably the only way they'd be allowed, their safety benefits would likely be minimal. To see significant safety benefits, they'd have to replace most FHVs.

I Wrote a New Book!!! Optimization: A Bootcamp for Machine Learning, Inverse Problems, and Control Pre-Order Now (July 31) amazon.com/Optimization-B… Coming Soon: * Free PDF on website * YouTube Videos for entire book * Python code on GitHub

@LevyAntoine Is it cap and trade? Can you sell your spot?

This is basically just designed to annoy @mattyglesias

@weakinstrument @LumberTrading Admin should get Shaq to say high gas prices don’t matter if you only put in $20 worth

@LumberTrading Stinson DO NOT let Kevin Hassett see this tweet. He WILL go on CNBC to say "high gas prices are good because it's teaching kids math, which is something we sorely need right now."

One of the fun byproducts of high gas prices is I get to do fun math word-problems with my kids deciding how far to drive to get cheaper gas and still makes it worth it

Which of the US or EU do economic agents choose to locate in? Their choice reveals how they weigh all the factors that matter. The relevant agent for productivity and economic growth are firms. So, the migration rates of startups reveals the economy where you want to be to grow and succeed:

Great Brookings piece by Tracy Hadden Loh, Hanna Love, and Bethany Krupicka on downtown revitalization and the need to repurpose surface parking lots brookings.edu/articles/tackl…

@weakinstrument Bunching estimators

Wait if "health, education, and welfare" are seperate from Public, then what is Public?? The people who say they do Public Econ need to provide some answers! No one is believing that you can Voltron together like 9 fields and just call it "Public." The jig is up, folks!!!

@jburk3r @jasonc_nc I actually agree with the threefold division of NY into Upstate + city + long island (others seem good too)

@arpitrage @jasonc_nc The vote for California being 3 states failed but I do like a Northern, Southern, and California. Texas could be 3-5 different states. New York could be State, City, and Long Island. Florida / South Florida.

I think the electoral college was a mistake and we should have ~42-45 states

A key part of the Texas infinite city sprawl model seems to be property taxes and MUD districts which allow for large public good spending (ie schools, parks) in the periphery, leading to an expanding wave of development High remote work also reduces need for CBD centrality

@MGJohnson24 @oliverwkim Offset by the rise in loneliness

@arpitrage @oliverwkim This will also contribute to higher life expectancy: news.gallup.com/poll/693362/dr…

Whenever Twitter is doing its annual round of Europe - US comparisons I can't help but think of charts like this

@jasonc_nc Yeah, split up some of the larger states

@arpitrage I’m open to this. Assuming we’re going to attempt some proportionality here?

@dggoldst I think you should waive the ban if you can convince the authors of the hallucinated paper to write the made up paper in question

arxiv imposing a 1 year ban on authors who submit hallucinated references is good. Authors should be able to write with AI but need to be fully accountable for catching that level of error. Doesn't matter if humans also sometimes cite non-existent things. 1 year ban them too.

When is Amtrak going to get Starlink?

Very excited to launch a project I've been helping out with the last couple months.* The Center for Shared AI Prosperity is an attempt by an, other than me, very impressive team (so far including @davidshor, @katz_morris, @StefFeldman, @maidinoff, Lindsay Lamont, Jesse Stinebring, @joshhendler, @goldman, and Lilah Penner Brown) to force DC policy elites to take the impending economic impacts of advanced AI more seriously. We do not think this is a normal economic shock, though we are deeply uncertain about what kind of economic shock it will be. We could be left with a world of extreme power and wealth concentration, increasing political instability arising from that growing inequality, and deep questions about how to fund governments that have for a century-plus relied on income and payroll taxes. Our main purpose as an organization is to surface tractable ideas to reform and grow the safety net to meet the moment; to restructure the labor market so workers are still valued and fairly paid; to remake the tax code so that the gains from AI are shared widely; and to experiment with ways of giving average Americans concrete shares in the AI surplus. To that end, we're running a Request for Ideas, and we're offering $3,000 for the best proposals. Top ideas will get rigorous polling from Blue Rose Research to see how Americans feel about them. We are trying to solicit submissions from a wide pool, and purposefully don't want to just ask the usual think tanks, economists, academics, etc. (Though we want them too!) If you have ideas that you think could be useful, please don't hesitate to apply. Feel free to reach out to me if you have any questions about the program. Read more here: csaip.org *Obligatory disclaimer: I'm doing this on my personal time, not in my capacity at Coefficient Giving. Nothing I or CSAIP say necessarily reflects CG's views.