Erez Yoeli
erezyoeli.bsky.social
Erez Yoeli
@erezyoeli.bsky.social
Research Scientist, MIT Sloan
Director, Applied Cooperation Initiative
Co-author, Hidden Games
Research focus: How to motivate people to do good
October 16, 2025 at 3:29 PM
“Dumb” as they may seem, symbolic gestures matter.
September 29, 2025 at 1:55 PM
Titus would like a word.
August 25, 2025 at 12:47 AM
The golden rule of spin: if you have nothing good to say, say nothing at all.
June 6, 2025 at 1:28 AM
Moshe Hoffman and I have used game theory to look into why this might happen. You can find our work in the below paper, and in our Ch. 12 of our book, Hidden Games.

www.researchsquare.com/article/rs-2...
June 5, 2025 at 1:20 PM
Garber’s got the gift of gab
April 15, 2025 at 1:36 AM
April 2, 2025 at 1:51 PM
From today’s Morning Rounds newsletter:
March 4, 2025 at 2:09 AM
For a while...
December 19, 2024 at 5:12 PM
So, luxury manufacturers maintain exclusivity by jacking up the price.

They don't need to increase quality. Just jacking up the price is enough.
December 19, 2024 at 5:12 PM


What if folks get richer? For most producers, that would be great news, since they could just sell their product to more people.

But when it comes to luxury goods, the logic is different, and uglier. If everyone can afford an LV handbag, then no one would want one.
December 19, 2024 at 5:12 PM
Receivers don't value the signal per se, but they might still attend to it if it reveals useful information.

Namely, if senders who can afford to send the signal are the more desirable ones.
December 19, 2024 at 5:12 PM
In a costly signaling framework...

- Senders wish to be accepted by receivers (as e.g., friends, coworkers, romantic partners)

- Some senders are more desirable than others, but it's hard to tell them apart

- Senders can send a signal at some cost

Here's the model; from our book Hidden Games.
December 19, 2024 at 5:12 PM
We do get something for our increased transportation spending — about 10 mins a day in shorter commutes, on average.

cdn.statcdn.com/Infographic/...
December 11, 2024 at 2:48 PM
Might I recommend Michael Thaler's experiments, which very cleanly demonstrate this? Here is a link and a brief summary.

arxiv.org/pdf/2012.016...
February 23, 2024 at 12:10 AM
We also tried two different public good frames: one in which the individual was directly contributing to the environment, and one in which the community was working together to contribute to the environment. TLDR: there wasn't a huge difference.
February 5, 2024 at 7:14 PM
But how do you increase observability in a social media ad?

Our solution: tell them they can "share their progress" (control on the left, observability treatment on the right)
February 5, 2024 at 7:13 PM
This is a simple paper.

Our task: help our partner use social media ads to enroll people for a peer-to-peer solar program, in which people who can't install solar themselves buy the extra production from a neighbor.
February 5, 2024 at 7:12 PM
New paper in JEBO: telling people their contributions can be made observable increases participation in a peer-to-peer solar program.

doi.org/10.1016/j.je...
February 5, 2024 at 7:11 PM