Alessandro Martinello
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alemartinello.com
Alessandro Martinello
@alemartinello.com
Econ PhD from the University of Copenhagen. Ex-academia at Lund University, ex-policy at the Danish Central Bank, finally landed in the private sector and leading the data agenda at Realkredit Danmark. We have cookies!

www.alemartinello.com
Maybe the 10€ in a forest outside Aarhus? Price is slightly less, but it is CPH central prices without being 1) in Copenhagen or 2) in a central pedestrian street.
November 23, 2025 at 12:43 PM
I was fortunate enough to have a 6m period at Harvard during my PhD. Great environment, absurdly stimulating. But the competition among students was toxic. It was a mad race to obtain the coolest most exclusive data, research question came later. This story did not surprise me, was bound to happen
November 23, 2025 at 6:58 AM
Oh yeah it totally doesn’t line up - but that shows exactly how those environments can be completely detached from reality in those regards. It would have been caught immediately in any other “normal” department for exactly those reasons
November 23, 2025 at 6:46 AM
Besides the accurate description of 🇩🇰 register data 😉 - the article mentions why they were not alarmed.

An impossibly well-connected young man with family ties to large companies, NGOs and governmental agencies, with corporate actors lining up to dole out favors? Yah that’s our median PhD students
November 23, 2025 at 12:57 AM
2) speculative, but lots of Danish hhds are not quite open to the idea of io. The ideal of “being debt free” runs strong. Would a slower amortization be still tecniche consistent with that ideal, and be attractive to more households?
November 18, 2025 at 5:50 PM
…through which it could occur.

1) regulations. The Danish FSA has a very strong prior against variable rate mortgages with io. Hence regulation restricts them in some areas and for some hhd (typically first time buyers). But 40y F5s would open up the yellow and pink dots in the table
November 18, 2025 at 5:50 PM
Depends on adoption and substitution rates, no? Of course say that 40y mortgages are developed and nobody takes them up, no effects. If all ppl who take them up would have taken IO anyway, also little to no effect. But if 40y is adopted at the extensive margin, well…

There are a few channels…/
November 18, 2025 at 5:50 PM
As it often turns out, Claes and I tend to agree :)
November 18, 2025 at 2:54 PM
Yeah, you are right ofc. I remember we had a reading group at Lund at faculty/phd level those years, reading about ML applications in Econ, and the “automatic variable selection” stuff always rang false to me and other colleagues somehow.
November 15, 2025 at 3:26 PM
Med dette definition er flertallet i Danmark sandsynligvis allerede efterkommere i forhold til personer med danske oprindelse i 1900.

Men måske var flertallet ikke efterkommere i 1800 ift 1700. Make Denmark Stavnsbundet again!
November 15, 2025 at 9:08 AM
Besides medieval England ofc, but nowadays, why would one choose another material though? Is there such a large difference in price?
November 15, 2025 at 7:03 AM
Shorter, but not short. We just had to change ours in our house, which was done 40 years ago. The new one, with copper bindings, could last to 50yrs if well maintained.

Many houses get demolished and rebuilt in that time period
November 15, 2025 at 6:43 AM
See these are the things that makes me wonder what we did in our previous life to deserve 3 kids in a row (5,3 and 1) that first slept through the night at around the age of 2.

The youngest (1) wakes up between 5 and 6 times per night.

No wonder I am getting bald
November 15, 2025 at 6:30 AM
I never really thought (or taught) DML as a tool for kitchen-sink variable selection though. Aren’t most people using it for “as close as non-parametric as you can get” for control adjustment?

Ie I have there 10 vars I want to adjust for. They prlly interact non linearly. DML the heck out of them
November 15, 2025 at 6:22 AM
In a letter Tolkien pretty directly says that technological augmentation rather than skill cultivation is Evil.
November 12, 2025 at 3:28 PM
Well you wouldn’t *accumulate* equity, which can be a perfectly viable financial strategy. But maybe not for first time buyers 😅
November 11, 2025 at 9:20 PM
Mmmmh. Not really
The point is, that the most important discussion about such a measure should be about these types of effects. Who gains? Who loses?

Instead most critics have focused, not surprisingly, on an entirely wrong point.

Dying before paying off a mortgage is bad!
Well, that’s good, actually!
November 11, 2025 at 6:27 PM
Novo Nordisk 😅
November 10, 2025 at 4:00 PM
I see your point. I believe my unstated assumption is that there are at least 2 submarkets, say “large/premium/old” and “small/mass”. Stock of “premium” is ~constant bc it primarily depends on location.
If so, and with the mechanism described above, wouldn’t you expect a divergence in prices?
November 10, 2025 at 3:47 PM
…in those segments, so the difference between the m2 price of larger dwellings closer to urban centers (preferred by working families) and smaller, cheaper homes or rentals (where old ppl used to move to free up illiquid wealth) exploded in recent years.

🇩🇰 Ref: rockwoolfonden.dk/udgivelser/d...
November 10, 2025 at 10:46 AM