Craig Fratrik


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Covid 8/26: Full Vaccine Approval

typo: An argument against weaning masks on the margin, and

should be

An argument against wearing

Covid 8/19: Cracking the Booster


"after testing negative every day or quite a while. Daily testing is an interesting idea."

should be

after testing negative every day for

Covid 8/5: Much Ado About Nothing

NIH Director Francis Collins claimed he misspoke, and tweeted to clarify.

Let me clarify the masking message that I garbled on @NewDay this morning. Vaccinated parents who live in communities with high COVID transmission rates should mask when out in public indoor settings to minimize risks to their unvaccinated kids. No need to mask at home.

Not sure how to feel about the poor communication, but propagating the followup, I think.

Bring Back Free-Flow Valves

What type of pump do you use?

I was having trouble getting an extension on my bike pump that would work.

I started thinking about how how 3d-print something that would reach in and make it free flow.* Perhaps such a device would help your issue.

  • Step 1: Learn how to do 3d-printing
Covid 1/7: The Fire of a Thousand Suns

You might want to add Ireland to your Europe graph. It is now higher than UK and much steeper. Portugal is also running parallel to UK since Dec 28 (in log levels).

Actually in general, how do you decide who is in vs out? Netherlands and Denmark are still on the decline.

Adapting to Means Testing

Every means tested program also adds to the implicit marginal tax rate. If benefits phase out as you earn more, it is as if you are being taxed at a higher rate.

Here are some more details from 2009, I'm not sure about the situation now. And it's hard to analyze nationally, because it depends on state and local programs as well.

Covid 12/24: We’re F***ed, It’s Over

You highlight the growth in UK cases, so I tried to make a rudimentary way of tracking such growth in other, affected countries. - - Keeps track of which countries have tested positive. ( posts when new reports come out)

OurWorldInData of said countries (dropping Australia):



  • Ireland seems to be on a steeper path than UK, although they are starting from a much better position.
  • Israel is as steep, but predates the UK, so presumably from other reasons.
  • The new variant doesn't seem to show up in the others yet.
What trade should we make if we're all getting the new COVID strain?

Another idea, long an Israeli ETF (ITEQ) and short either the world or Europe, (VTI or VGK). They seem to be the only country on pace to immunize enough people before the wave hits.