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Claims about AI and science

2026-01-17 03:38:35

You should take these as quite context-specific numbers rather than as absolutes, nonetheless this is interesting:

Scientists who engage in AI-augmented research publish 3.02 times more papers, receive 4.84 times more citations and become research project leaders 1.37 years earlier than those who do not. By contrast, AI adoption shrinks the collective volume of scientific topics studied by 4.63% and decreases scientists’ engagement with one another by 22%.

Here is the full Nature piece by Qianyue Hao, Fengli Xu, Yong Li, and James Evans.  The end sentence of course does not have to be a negative.  Via the excellent Kevin Lewis.

The post Claims about AI and science appeared first on Marginal REVOLUTION.

Why are groceries so expensive in NYC?

2026-01-16 15:15:58

The lowest-hanging fruit is to simply legalize selling groceries in more of the city. The most egregious planning barrier is that grocery stores over 10,000 square feet are not generally allowed as-of-right in so-called “M” districts, which are the easiest places to find sites large enough to accommodate the large stores that national grocers are used to. Many of these districts are mapped in places that are not what people have in mind when they think “industrial” — mixed-use neighborhoods with lots of housing like stretches of Williamsburg’s Bedford Avenue and almost all of Gowanus, even post-rezoning, are in fact mapped as industrial districts.

To open a full-sized grocery store in these areas, a developer must seek a “special permit,” which requires the full City Council to get together and vote for an exception to the rules. This is a long, uncertain process, and has in the past even been an invitation to corruption.

Most famously, the City Council uses this power to keep out Walmart at the behest of unions and community groups. Thwarted in its plans to open a store in East New York — a low-income Brooklyn neighborhood that could desperately use more grocery options — the nation’s largest grocer instead serves New Yorkers with a store just beyond the Queens/Nassau line in Valley Stream, rumored to be the busiest Walmart in the country. New Yorkers with a car and the willingness to schlep beyond city limits — or pay the Instacart premium — get access to cheaper groceries; the rest get locked out.

When politicians are willing to approve a grocery store, the price can be high.

That is by Stephen Smith, via Josh Barro.

The post Why are groceries so expensive in NYC? appeared first on Marginal REVOLUTION.

Michelle Tandler on NYC rent control

2026-01-16 13:43:57

This is what I’m seeing: + 2.4 million rent-controlled apartments in a city with a massive housing shortage and 1.4% vacancy rate.

+ A huge % of these tenants are wealthy, white boomers using the units as pieds-a-terres while they spend their weekends and summers elsewhere.

+ Meanwhile, the government is using rent control to purposely drive down the value of multifamily housing, so that it can be purchased in a fire sale by the government.

+ The small-time landlords with big rent rolls of “stabilized” units are going under. Their portfolios end up in the arms of PE and foreign money (how are Progressives okay with this?) The banks will get hit by this too.

+ Because there is such a reduction in supply (~40% of units are price-controlled), leftover supply is ~33% more expensive + Because NYC gov is not friendly towards landlords, there is a lack of development –> even less supply

+ Rich and homeowners overwhelmingly support these laws b/c it drives up the value of their condos & co-ops (less supply –> higher prices for condos)

+ Big PE companies like these policies b/c they can buy buildings in fire sales and wait for rent control reform (5-10 years out)

+ Meanwhile – ~2.4 million units are rotting and won’t be brought up to code as tenants leave b/c the numbers don’t pencil –> 50k “ghost apartments” padlocked off market now, maybe 100k soon

+ Gen Z and the working class continue to vote for these policies, hoping they will be among the lucky few to win the lottery ticket of a rent-controlled apartment

+ Meanwhile, boomers hang onto their units and pass them to their children, family members, etc. –> NYC’s housing stock is rotting slowly, going offline, and becoming more expensive

Here is the link.  Thoughts to ponder, whether or not you believe in all of those steps.  Here is some Maryland data, not sophisticated econometrics.

The post Michelle Tandler on NYC rent control appeared first on Marginal REVOLUTION.

Thursday assorted links

2026-01-16 02:40:18

1. New Substack on Abundance.

2. Does AI mean the demands on labor go up?

3. This obituary has plenty of interesting information about South Africa’s nuclear program (NYT).

4. Mercatus 1991 fellowship on state-level Indian economic policy.

5. Legal framework for crypto is hitting some snags (NYT).

6. “I find that parental transfers account for 13 percentage points (27%) of young households’ homeownership…Finally, I show that children of wealthy parents strategically use the illiquidity of housing as a commitment device to encourage transfers, resulting in a preference for illiquidity.” Link here.

7. Another desertion from the very pessimistic camp on AI.

The post Thursday assorted links appeared first on Marginal REVOLUTION.