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Arpit Gupta
@arpitrage
Associate Professor of Finance, . Finance/Real Estate/Urban newsletter: arpitrage.substack.com. Mastodon: econtwitter.net/@arpitrage
EducationManhattan, NYarpitgupta.infoJoined September 2015

Arpit Gupta’s Tweets

Tesla’s market share has been slipping a bit — but it seems to enjoy a durable cost/marketing advantage providing much higher margins than the rest of the auto industry.
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This is the CAPM takedown that everyone has been waiting for
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CAPM-based measures of the cost of capital are poor. The IRR of comparable firms explains the cross-section of firm values much better, and is easy to implement, from Nicolas Hommel, @augustinlandier, and @dthesmar nber.org/papers/w30898
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There are two active carbon capture plants in the US. 55 in the works across these states. A lot on TX and LA, where there is a favorable land use, permitting environment, etc. Unlikely to take off in the Northeast due to NIMBYs locally and no pipelines to export carbon
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• the storage part is pretty simple. The challenge is the economics of finding concentrated carbon streams. • maybe carbon at $100/ton tax enough to encourage? Might not scale well, in that you have to move down to less concentrated carbon streams the more you expand.
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• Carbon capture discussion grew after international reports (starting around 2018) argued that to keep global climate on track, you really need to get carbon emissions to net *zero*; not enough to cut 80% That last 20% is intensive in these industrial uses hard to decarbonize
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• IEA projects 20-25% carbon mitigation by 2050 will come from carbon sequestration • not a lot of good alternatives for carbon mitigation in heavy metal/mineral construction (steel, aluminum, concrete) and are carbon intensive. Note these are also inputs for, ie, wind turbine
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Carbon capture panel at NYU Law: • Can be $35-40/ton cost when captured at source • $200-500/ton when taken from ambient air • US tax credits for carbon capture substantially increased this market ($85/ton rebate when stored in geological)
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Easy to see how this kind of AI assist is going to become standard for white collar workers
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Big News 🚨 Microsoft just launched Teams premium powered by ChatGPT at just $7/month 🤯 With ChatGPT, Teams users can generate automatic meeting notes, AI-recommended tasks, personalized meeting templates, and a lot more!!
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People talk about the Northeast Acela corridor — but the Raleigh/Birmingham corridor is absolutely booming economically and should be connected by high speed rail
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The Piedmont Atlantic Region is compact enough to warrant high speed rail. Birmingham to Atlanta to Greenville to Charlotte to Raleigh-Durham is a no-brainer. 27 million people live in the region.
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Reminds me of the idea that the Matrix would have made way more sense as a movie if the machines were using humans for computation rather than energy
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Large AI models like ChatGPT use a truly massive amount of computing power Cc: @Noahpinion @ylecun @erikbryn @amcafee
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Fun fact — when Bernanke disclosed his portfolio, the only single name stocked he owned was super-high dividend paying Altria (Philip Morris) money.cnn.com/2005/10/26/new
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From 2009 - 2022, Altria $MO paid $61.4 billion in dividends and repurchased ~$14.5 billion worth of stock for a total of ~$76 billion in cash returned to shareholders. For perspective, at the end of 2009, Altria's market cap was roughly $41 billion.
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Huge loss here for market efficiency. $100b in value wiped out in the Adani Group due to a short seller report which didn't really release any new information.
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A thread about why I think the soft landing has been achievable: Wages are downwardly sticky in nominal terms, but not in real terms. Also wage *growth* is not sticky downwards. This matters for both a low-cost cooling of the labor market and lack of a wage-price spiral.
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But anyway, the soft landing story was that went up with shocking speed could also come down with shocking speed. 8/
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Surprising persistence of mammoths into historical ages! Probably reflective of a broader pattern: species likely persist long after the available fossil record dries up, surviving in small niches.
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In a new study in @nature we found that mammoths survived in continental Siberia until 3,900 years ago!! At that time, for example, the Egyptian culture was florishing. The geography of the woolly mammoth extinction has just changed!! Work lead by Wang and Willerslev
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Interesting here — Brooks Brothers was profitable in a subset of stores, and cutting back could have ensured viability. But they had locked in long-term leases, would face penalties to leave, and so filed for bankruptcy.
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Additionally, most stores are not profitable. According to this exec, about 80% of BB's sales come from just 40 of its 150 stores. ("I could have closed 100 stores and it would barely have an impact on sales, he said). But he couldn't close them bc of real estate leases.
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Seems surprising in light of the Khan Academy style results that there was a lot of variability in individual learning speeds. If it’s more about initial levels, I guess that calls for initial remediation before standard class tracks as currently done. cc
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Cool paper finds that all students tend to learn math at about the same rate, and the differences between them are almost all due to their initial level of knowledge. psyarxiv.com/pxsfh/
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I wonder how much power we could get by letting nuclear submarines run just offshore, and using them to power the grid
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so amazing that - the universe gave us an infinite energy glitch - the US decided to use it to power giant underwater Gods (Ohio class submarine), enough to power it straight for 30 years - then entire society collectively chose not to use this energy source for anything else
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This is it! HCD will review Bay Area cities to see if they've zoned for new housing in wealthy areas. If a city fails, their zoning will be suspended and unlimited height & density at >20% affordable housing can be approved anywhere. Many are about to fail
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The Via Appia was more famous in Classical times; but the Via Aemilia proved to be more durable. There is just a clear line of cities all sited at the edge of the northern Apennines making a great linear track. Modern road/railroad lies substantially on top of the Roman road.
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I suspect mountain areas are actually quite good for trains — restricting passage to a smaller number of passes means you can service many people with a smaller number of lines.
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Zurich's main train station sees 2,915 trains per day, with 47 train routes coming from other countries, regions, and the suburbs. Tampa, which has the same population but double the metro population, sees 1 Amtrak train daily. We don't need perfection, we just need better.
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Zurich main station from aerial photo
Tampa main station
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