John B. Holbein Profile picture
Aug 5 7 tweets 3 min read Read on X
BREAKING: new study just dropped that shows compelling evidence that cell phone bans cause student grades to modestly increase.

Grade increases are largest among low performing students. Image
Some other interesting findings from the cell phone ban study:

Students exposed to the cell phone ban were substantially more (!) supportive of phone-use restrictions.

The ban increased students' perceptions of greater benefits from these bans and reduced students preferences for unrestricted access.Image
Despite a mild rise in reported fear of missing out, there were no significant changes in overall student well-being, academic motivation, digital usage, or experiences of online harassment. Image
There were maybe some potential drawbacks.

Spot checks of classrooms in the study revealed that students in the banned classes appear more distracted, possibly due to withdrawal from habitual phone checking.

However, students did not report being more distracted.Image
Ultimately, the authors of the study conclude:

"[Our] results suggest that in-class phone bans represent a low-cost, effective policy to modestly improve academic outcomes, especially for vulnerable student groups, while enhancing student receptivity to digital policy interventions."Image
"Removing Phones from Classrooms Improves Academic Performance"

papers.ssrn.com/sol3/papers.cf…Image
The authors of the study are: @Alpsungu, @andbjn, and P. Choudhury.

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More from @JohnHolbein1

May 7
This figure is striking.

It shows the relationship between where people think they are in the income distribution and where they actually are.

Observations below the line indicate that people think they are poorer than they really are (and the reverse above the line).

What do you notice?Image
If you answered "people think they are poorer than they really are", you'd be right!

Source: "Richer (& Holier) than Thou? The Effect of Relative Income Improvements on Demand for Redistribution"

Paper uses data from 🇸🇪.

direct.mit.edu/rest/article-a…
Here's another way to see the "people think they are poorer than they really are" phenomena.
Read 6 tweets
May 1
Studying economics and business in college makes students become much more conservative. Image
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Here are the estimated effects of individual majors on ideology.

What stands out to you? Image
"Changing Minds: How Academic Fields Shape Political Attitudes"

papers.ssrn.com/sol3/papers.cf…Image
Read 4 tweets
Apr 6
Wow! This project looks amazing.

In it, three scientists at Columbia, Michigan, and Maryland introduce VRscores: a measure of the partisan leanings of employers in the United States.

The dataset is constructed by linking U.S. voter registrations to online worker profiles.

The dataset covers the 2012-2022 period. VRscores capture the political affiliations of 21.8 million workers across 2.6 million employers.

Wow!Image
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Overall, many employers in their sample have a distinct Democratic tilt. Look at how few sectors are dominated by Republicans!

{This could have something to do with what orgs are in their database, but their sample is quite large!} Image
Look at how liberal Universities {left screenshot} are relative to their entire sample of employers {right screenshot}. Image
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Read 9 tweets
Nov 25, 2024
Look at the gender breakdown of who speaks in popular films! Image
If it's too hard to see, here's the takeaway: men dominate spoken work in popular films. Image
Male characters dominate the scripts of most popular Disney movies. Image
Read 5 tweets
Nov 25, 2024
Clear evidence that people who include their pronouns in their email signatures receive preferential treatment in higher education settings. Image
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"Gender identity and access to higher education"

tandfonline.com/doi/abs/10.108…
Clear evidence that employers discriminate against nonbinary individuals.

All-else-equal, disclosing that one uses "they/them” pronouns substantially lowers the chances of getting a job interview. Image
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Read 4 tweets
Apr 15, 2024
How many people go to church weekly?

Surveys say it's about 1 in 5 Americans.

Cell phone tracker data say it's actually closer to 1 in 20 Americans.

Fascinating new working paper!

nber.org/papers/w32334



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Week to week variation in religious attendance according to cell phone tracking data. Image
Comparing survey and cell phone tracking data of religious attendance by state.

Look at Utah! Image
Read 4 tweets

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