Jonah M. Rexer's Avatar

Jonah M. Rexer

@jonahrexer.bsky.social

World Bank economist studying global poverty, cities, adaptation, and the political economy of development. Work on South Asia and Africa. Just run OLS. https://www.jonahrexer.com/

1,839 Followers  |  312 Following  |  58 Posts  |  Joined: 18.11.2024  |  2.1805

Latest posts by jonahrexer.bsky.social on Bluesky

The EU is determined to clamp down on organised crime’s infiltration of legitimate businesses and banking. This column shows that dismantling Mafia connections leads to more bank credit to legitimate businesses, raising local output and productivity. It also leads to a modest increase in borrowing costs, driven by foreign and non-local banks, as they update their risk models in light of new revelations. These findings suggest that tighter crime controls can strengthen the banking system and wider economy – a win-win for Europe’s security and prosperity.

The EU is determined to clamp down on organised crime’s infiltration of legitimate businesses and banking. This column shows that dismantling Mafia connections leads to more bank credit to legitimate businesses, raising local output and productivity. It also leads to a modest increase in borrowing costs, driven by foreign and non-local banks, as they update their risk models in light of new revelations. These findings suggest that tighter crime controls can strengthen the banking system and wider economy – a win-win for Europe’s security and prosperity.

Dismantling Mafia connections leads to more bank credit to legitimate businesses, raising local output and #productivity. Tighter #crime controls can strengthen the #banking system and wider economy.
B Buchetti, M Fabrizi, E Ipino, I Miquel Flores, A Parbonetti
cepr.org/voxeu/column...
#EconSky

17.07.2025 08:29 — 👍 20    🔁 8    💬 0    📌 3

The solution to AI cheating has been painfully obvious from the beginning. I have no idea why this is even remotely controversial. Just 15 years ago, basically all of my exams were written in blue books. I’m not sure when or why this changed but it’s time to RETVRN.

01.07.2025 21:06 — 👍 7    🔁 0    💬 0    📌 0

I spent two years of my life driving around LA and blasting Pet Sounds on repeat. They were great years.

RIP Brian Wilson. Simply one of the greatest to ever do it.

11.06.2025 20:16 — 👍 1    🔁 0    💬 0    📌 0

Looking forward to presenting work on extreme heat and industrial structure in India at the BSE Summer Forum this week. Drop me a line if you’re going to be there!

03.06.2025 01:22 — 👍 0    🔁 0    💬 0    📌 0

It’s just a list of people he considers right wing who have done drugs

02.06.2025 21:37 — 👍 1    🔁 0    💬 0    📌 0

Haha I thought this was that Jeet parody bot honestly

02.06.2025 21:12 — 👍 0    🔁 0    💬 0    📌 0

That could be a great paper though

02.06.2025 18:24 — 👍 3    🔁 0    💬 1    📌 0

Damn well done, that’s an awesome vintage find!

31.05.2025 13:32 — 👍 1    🔁 0    💬 0    📌 0

Derek do you have good suggestions for mills that do really slubby raw silk. I want to get a jacket made. Very hard to find RTW.

30.05.2025 22:18 — 👍 3    🔁 0    💬 1    📌 0

Very nice piece on using LLMs as simulated participants in social science research. Can we do away with pesky humans? Not yet…maybe not ever?

29.05.2025 18:52 — 👍 1    🔁 0    💬 0    📌 0

Deep research is better than standard. Broad Qs much easier for ChatGPT than narrow ones, though often less useful for us. Getting a broad and well sourced overview of a literature is now possible. Anything deeper than that still suffers from the issues you identify.

29.05.2025 16:13 — 👍 1    🔁 0    💬 0    📌 0

Shouldn’t this awareness among traders imply that stonks no longer react to tariff announcements? Yet that doesn’t seem to be happening.

29.05.2025 15:52 — 👍 5    🔁 2    💬 0    📌 0
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On Sarah Milgrim, one of the victims in a heinous antisemitic murder this week in DC.

www.newyorker.com/news/the-led...

24.05.2025 13:21 — 👍 449    🔁 92    💬 33    📌 4
Preview
The 50 Best Stevie Wonder Songs The 50 Best Stevie Wonder Songs

Happy 75th Birthday, Stevie Wonder. 🎉

To celebrate, here is a list of the soul visionary's best 50 songs

13.05.2025 15:03 — 👍 7335    🔁 1351    💬 175    📌 144

I have had this experience several times

11.05.2025 00:49 — 👍 1    🔁 0    💬 0    📌 0
Preview
NBA playoffs takeaways: Nuggets top Thunder in final seconds, Knicks down Celtics in OT The two road teams of Monday's conference semifinal games executed well in the fourth quarter and stole Game 1 victories.

From @theathletic.bsky.social: Monday was a night of last-minute, come-from-behind upsets in the NBA conference semifinal round.

06.05.2025 13:57 — 👍 41    🔁 3    💬 1    📌 0

That’s my 🐐 #BrunsonBurner

02.05.2025 03:04 — 👍 1    🔁 0    💬 0    📌 0
Post image

Jalen Brunson's game-winning three sends the New York Knicks into the second round 🔥

02.05.2025 02:32 — 👍 591    🔁 57    💬 23    📌 16

Corporate greed!

01.05.2025 16:38 — 👍 0    🔁 0    💬 0    📌 0

Why in the world would used car prices rise, they’re not tariffed…

01.05.2025 16:31 — 👍 0    🔁 0    💬 1    📌 0

When you don’t understand pass through and substitution patterns.

01.05.2025 16:30 — 👍 0    🔁 0    💬 1    📌 0

The times I’ve used AI for model-writing, it makes exactly the same dumb mistakes I would!

01.05.2025 13:39 — 👍 1    🔁 0    💬 0    📌 0

It also made a few obvious algebraic errors like forgetting the quotient rule of a derivative. Make sure you check its work!

29.04.2025 23:10 — 👍 0    🔁 0    💬 0    📌 0

Had an interesting experience with ChatGPT today trying to write a model. It was at once incredibly good at taking my idea and turning it into a nice toy model. At the same time it couldn’t say no when I asked it to do mathematically impossible things because it can’t reason from first principles.

29.04.2025 23:08 — 👍 1    🔁 0    💬 1    📌 0

I’ve tried this experiment as well on economics papers, and chatGPT was honestly not great. Not terrible, but a lot of generic fluff. My report was significantly better. It also recommended acceptance on a weak paper for a good journal. It’s too agreeable, though I do hope my next R2 uses ChatGPT!

29.04.2025 15:49 — 👍 3    🔁 0    💬 1    📌 0

Table supremacy 🙏🏼

24.04.2025 17:13 — 👍 1    🔁 0    💬 0    📌 0
The long-term effects of artificial intelligence are still unknown, as productivity benefits may be compromised by unintended costs. This column assesses the local effects of shocks to AI job postings on municipal capital markets. It finds that increases in postings are linked to declines in municipal bond yields, particularly for riskier and longer-term bonds. Furthermore, counties with higher AI labour investments experience improvements in local economic conditions and positive spillovers into local public finances. As AI adoption continues to grow, policymakers must consider how to ensure that its gains are widely shared.

The long-term effects of artificial intelligence are still unknown, as productivity benefits may be compromised by unintended costs. This column assesses the local effects of shocks to AI job postings on municipal capital markets. It finds that increases in postings are linked to declines in municipal bond yields, particularly for riskier and longer-term bonds. Furthermore, counties with higher AI labour investments experience improvements in local economic conditions and positive spillovers into local public finances. As AI adoption continues to grow, policymakers must consider how to ensure that its gains are widely shared.

An increase in #AI job postings are linked to declines in municipal bond yields, particularly for riskier and longer-term bonds. Counties with higher AI labour investments experience improvements in local economic conditions & positive spillovers.
L Andreadis et al
cepr.org/voxeu/column...
#EconSky

18.04.2025 08:38 — 👍 7    🔁 4    💬 0    📌 0
Against a backdrop of escalating geopolitical tensions and rapidly shifting global alliances, policymakers are advocating strategies such as ‘friendshoring’ to safeguard supply chain resilience. This column uses data on 700 US firms importing from 96 countries between 2007 and 2020 to show that US firms reduce imports from countries that become ideologically distant from the US, while increasing imports from countries that have become friendly. This effect is strongest for firms led by CEOs politically aligned with the US administration, prompting the question of whether firms are optimising for economic efficiency, or being guided by political loyalty.

Against a backdrop of escalating geopolitical tensions and rapidly shifting global alliances, policymakers are advocating strategies such as ‘friendshoring’ to safeguard supply chain resilience. This column uses data on 700 US firms importing from 96 countries between 2007 and 2020 to show that US firms reduce imports from countries that become ideologically distant from the US, while increasing imports from countries that have become friendly. This effect is strongest for firms led by CEOs politically aligned with the US administration, prompting the question of whether firms are optimising for economic efficiency, or being guided by political loyalty.

US firms reduce #imports from countries that become ideologically distant from the US, & increase imports from countries that have become friendly. This effect is strongest for firms led by CEOs politically aligned with the US administration.
M Ayyagari, J Gao, P Ma
cepr.org/voxeu/column...
#EconSky

14.04.2025 08:34 — 👍 7    🔁 2    💬 2    📌 0

Same bro.

07.04.2025 06:46 — 👍 1    🔁 0    💬 0    📌 0

Genuinely one of the funniest things I’ve ever seen. we need to mercilessly ridicule lawyers every time they open their mouths about economics.

07.04.2025 01:35 — 👍 4    🔁 0    💬 0    📌 0

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