Suppose you could improve Twitter as a public platform, what feature would you add (or remove)?
I would suggest for Twitter to give users the freedom to adjust the parameters of the recommendation algorithm. Something like:

Emotions:
😱—————|——🤗

Seriousness:
🧐—|—————— 😂

Political content:
🗳—————|——❌

Outrage:
🤬——————|—😎
Why? People may be enticed to click on the posts promoted by the default algorithm. But they may regret wasting their time that way, and they could *prefer* different content.
Research has shown that negative and extreme reactions attract more attention. But Twitter users could actually prefer less of it in their feed.
Interested in your ideas!

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More from @page_eco

13 Oct
The Nobel Prize in economics went to theorists who made major contributions to our understanding of how to design auctions.
If it seems far from you, it should not. Auction theory is one of the major successes in economics which had very large real world implications. (Thread)
Economists are known to like markets. Markets are a way to allocate resources. But they are not the only one. Auctions are another way to organise who get what, at what price. You are surely familiar with art auctions, housing auctions, or eBay auctions.
But really the notion of auction is very broad. Contests such as sporting matches, legal battles, political races, grant applications can also be conceived as auctions where contestants bid resources in the hope of securing a prize.
link.springer.com/article/10.100…
Read 8 tweets
21 Sep
How efficient markets are vs how efficient economists believe they are: our paper looking at more than 600 experimental markets is just accepted at @RevOfFinStudies!

We found economists likely believe markets are much more efficients than they are! 1/n
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Markets are “strongly efficients” if prices reflect *all* the private and public information available.
They are “semi-strongly” efficient if they only reflect all the public information.
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20 Jun
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You find forecasts of the chances of Biden to win in many places.
@StatModeling's recently posted about his model which gives a 88% probability for Biden to win.
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Read 20 tweets
11 Jun
An interesting thread (by my old friend @mioana) criticising how economists study discrimination. There are very good points in it.
I'll defend that the economic approach is important to address discrimination. But we should also be careful about how it can be used.
(thread)
First, let's point that economists are not ignoring discrimination, on the contrary. They study it a lot with the best tools they have such as laboratory and field experiments:
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Read 13 tweets
2 Jun
Why is the US police so lethal? One thing which sets the US apart is their number of guns in circulation. So I plotted the police killings with the number of registered firearms by state. There is a visible correlation.
1/
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This large presence of firearms in the population makes policing dangerous.
The disproportionate use of pre-emptive violence by US police officers is likely influenced by the possibility for anybody to carry a gun.
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Things we have learned about Covid-19:
It seems to mainly spread via cough/speech droplets, not via surfaces.
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1/
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There has been positive results for an antiviral drug (Remdesivir) and for the first phase of testing of a vaccine.
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Read 4 tweets

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