2/ As a general principle, solving the symptom of a problem without solving the underlying causes is a terrible idea. It removes the urgency to solve the problem once and for all, making it grow larger.
3/ One question worth asking is, why is student debt not a problem in Europe?
The naive answer: government subsidies to students.
The real answer: contained costs.
The total operational costs for my ex-university in 2018 were "just" $7.8k / student / year.
4/ How do we contain the costs of imparting high-quality education?
The thing is, tuitions were lower, 30 years ago. In the last decades, they rose higher and higher.
Then, the right question becomes:
What conditions made them grow, and how do we remove them?
3/ If we order the 21 parameters by descending predictive power, and apply it to the data used to build the model, we discover that:
- The first parameter alone predicts the outcome of many regions.
- The last parameter, at most, helps predicting the outcome of a single region.
THE FUTURE OF NEWSLETTERS
(and announcing my new newsletter 🎉)
Too much noise, too little content we actually use.
Take your favorite newsletter. Can you remember the contents of the edition-before-the-last-one?
Me neither. But I have a solution
(thread, 1/N)
2/ Today, I launch the RoamLetter.
A newsletter whose content directly integrates into your note-taking system.
A newsletter whose editions AUTOMATICALLY link with each other *and with your notes* 👏
A newsletter with built-in spaced repetition.
A timeless newsletter.
3/ If you are a Roam user, you'll enjoy how the topics of one edition of my newsletter automatically link with your body of knowledge, and the other way around.
If you are not a Roam user, no worries. You can still use all the other features of my newsletter (pics below)
MASKS WORK EVEN IF THE VIRUS IS SMALLER THAN THE HOLES IN THE FABRIC
As a first effect, the virus bounces on the fibers. That's enough to decrease the distance at which it "jumps out". It might even get some of the particles to stuck to the fibers.
(thread, 1/N)
2/ Second, N95 masks also have electrostatic charges that capture particles even if they are smaller than the holes in the fabric.
3/ Third, masks would work even if the virus passed fully through.
They reduce the distance at which it travels after, say, a sneeze. It's as if they introduced additional distance between people.
Moreover, they work both on the way out and on the way in.
6 million Italians should be in home quarantine, only a fraction of them because they tested positive. Most of them are there because tests are few and slow.
Another part of the problem is that enforcing the quarantine & working through the tests backlog is cheaper, easier, and more effective when there are few cases than when there are a lot,
But one would also need the will, capability, and wisdom to do so when it seems less urgent
1/ They don't fully protect you from virus in the air.
Yes, but their point is to prevent as much virus as possible from getting in the air in the first place.
(thread)
2/ There is this Randomized Control Trial I see posted on Twitter which allegedly shows that face masks do not work.
That trial shows that face masks do not protect doctors from patients *that do not wear face masks*.
Such studies do not demonstrate that face masks don't work.
3/ Paradoxically, the more you believe that someone wearing face masks is only partially protected, the more you should want everyone to wear them, so that there is less virus in the air.