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Wojtek Kopczuk

@wwwojtekk

Economist, tax policy/inequality. Professional skeptic. Anti-illiberal. http://www.columbia.edu/~wk2110/index.html @wwwojtekk at various other websites

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Latest posts by Wojtek Kopczuk @wwwojtekk

To be honest, this looks like his more much mature work.

06.03.2026 19:40 ๐Ÿ‘ 0 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0

Lawyers I know disagree; they were illegal so this was not a tariff statue. More importantly, Congress could certainly do something here.

06.03.2026 19:22 ๐Ÿ‘ 0 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0

The UI team even added an arrow there. Unreal

06.03.2026 18:52 ๐Ÿ‘ 12 ๐Ÿ” 0 ๐Ÿ’ฌ 1 ๐Ÿ“Œ 0

And his touch is unmistakable here too

06.03.2026 18:18 ๐Ÿ‘ 2 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0
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I have to admit that Hormuz is a very clever design that keeps things interesting. Kudos to Slartibartfast.

You can't convince me that it was an accident.

06.03.2026 18:08 ๐Ÿ‘ 54 ๐Ÿ” 4 ๐Ÿ’ฌ 3 ๐Ÿ“Œ 1

I'm all for holding in contempt any branch of this administration, but why should refunds go to importers if they passed them through to their customers?

06.03.2026 17:34 ๐Ÿ‘ 1 ๐Ÿ” 0 ๐Ÿ’ฌ 2 ๐Ÿ“Œ 0

That would require thinking

06.03.2026 15:16 ๐Ÿ‘ 35 ๐Ÿ” 0 ๐Ÿ’ฌ 1 ๐Ÿ“Œ 0
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Is this the first 5.16a?

04.03.2026 15:09 ๐Ÿ‘ 5 ๐Ÿ” 1 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0

White blood cells and regression discontinuity? Are you into health economics now?

04.03.2026 02:34 ๐Ÿ‘ 4 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0

Get them freaks

26.02.2026 13:09 ๐Ÿ‘ 2 ๐Ÿ” 1 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0

I think "superseded" is wrong. It presumes that people used to read much more than they actually did. It also presumes much broader participation in posting (rather than consuming) videos than I think is warranted

23.02.2026 18:51 ๐Ÿ‘ 1 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0

A ton of discussions have always happened in pubs and at homes, but that's not a close substitute for public discourse

23.02.2026 18:44 ๐Ÿ‘ 1 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0

It's not the form, it's the one-way nature of interactions. I guess I'll remain unconvinced that it's an equivalent of a "public square" any more than innuendos in books, movies or music used to be "public square". That's things that are happening on the margin

23.02.2026 18:06 ๐Ÿ‘ 0 ๐Ÿ” 0 ๐Ÿ’ฌ 1 ๐Ÿ“Œ 0

"discourse"? I'm not going to deny that it has influence but that's not the word I'd use

23.02.2026 18:00 ๐Ÿ‘ 0 ๐Ÿ” 0 ๐Ÿ’ฌ 1 ๐Ÿ“Œ 0

Oh yes, all those important conversations taking place on YouTube, Instagram and TikTok

23.02.2026 17:54 ๐Ÿ‘ 11 ๐Ÿ” 1 ๐Ÿ’ฌ 1 ๐Ÿ“Œ 0
23.02.2026 12:10 ๐Ÿ‘ 4 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0

That's unfair. It's well-known that five-year olds cannot control their tantrums

21.02.2026 22:24 ๐Ÿ‘ 15 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0

I appreciate the throwback to the popular joke (but, really, the truth) under communism, but I am actually usually sure that corruption in this administration is true whether they deny or not

19.02.2026 22:52 ๐Ÿ‘ 12 ๐Ÿ” 2 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0

He clearly likes humiliation. Why do you encourage his fetish?

16.02.2026 01:53 ๐Ÿ‘ 18 ๐Ÿ” 0 ๐Ÿ’ฌ 2 ๐Ÿ“Œ 0
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So much to unpack

28.01.2026 21:39 ๐Ÿ‘ 19 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0

I hope she stapled her paperwork before filing

23.01.2026 00:40 ๐Ÿ‘ 6 ๐Ÿ” 0 ๐Ÿ’ฌ 1 ๐Ÿ“Œ 0
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The lawyer said with a straight face that it'd take an act of Congress to stop the president from sending military to deal with the Beatles

22.01.2026 23:12 ๐Ÿ‘ 15 ๐Ÿ” 1 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0
Tutejszy - Wikipedia

Not many, because of how borders changed and repatriations, mostly in Podlasie where my family is from. Before WW II there were a lot of orthodox Polish citizens. Of course, "Polish" is self-identification, before WW2 it likely was this en.wikipedia.org/wiki/Tutejszy en.wikipedia.org/wiki/Podlash...

22.01.2026 23:03 ๐Ÿ‘ 1 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0

But that was a market

22.01.2026 20:46 ๐Ÿ‘ 1 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0

I'm teaching uncertainty in GE soon and I'm going to steal this thread

22.01.2026 18:45 ๐Ÿ‘ 6 ๐Ÿ” 1 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0

Yes, Polish :)

22.01.2026 20:44 ๐Ÿ‘ 0 ๐Ÿ” 0 ๐Ÿ’ฌ 1 ๐Ÿ“Œ 0

He got the direction of casuality wrong

22.01.2026 18:31 ๐Ÿ‘ 2 ๐Ÿ” 0 ๐Ÿ’ฌ 1 ๐Ÿ“Œ 0

Arrow-Debreu commodities

22.01.2026 18:28 ๐Ÿ‘ 10 ๐Ÿ” 0 ๐Ÿ’ฌ 2 ๐Ÿ“Œ 0

Based on what?!

22.01.2026 18:27 ๐Ÿ‘ 1 ๐Ÿ” 0 ๐Ÿ’ฌ 1 ๐Ÿ“Œ 0

I happen to be eastern Orthodox, so no real stake at this fight between heretics

22.01.2026 17:03 ๐Ÿ‘ 3 ๐Ÿ” 0 ๐Ÿ’ฌ 1 ๐Ÿ“Œ 0