Hans Henrik Sievertsen Profile picture
Economist @VIVEviden and @BristolUniEcon

Jun 2, 2023, 12 tweets

๐Ÿšจ New Working Paper ๐Ÿšจ

We show that applicants manipulate their address to get access to their preferred school and thereby push out non-strategic students.

Friday, so I am giving you 3 options. A gif, a ๐Ÿงต, and the full paper!

#EconTwitter @ChrisANeilson @Woessmann

1/N

Do you remember Andrea?
- she used her grandmother's address to secure a place at West Beverly High!

2/N

Does this also happen in real life?

- We looked at real data from Danmark (of course )
- We observe a lot of address changes around the high school application deadline

3/N

And it didn't use to be like that

- Before school priority was based on distance to school, we didn't observe any changes around the deadline!

4/N

The number of address changes doubled!

5/N

And this was NOT poor Andrea, but kids from more affluent households

6/N

Interestingly, the response is driven purely by 15y old changing the address without any other member of the family changing address!

- There is no response in family moves

7/N

And this affected non-strategic applicants!

- More than 1/4 who did not enroll in their preferred school would have been offered a place in absence of manipulation by their peers

8/N

But is this cheating?

- Well when a municipality started to ask for additional proof that the 15y really lives at the new address, the effect was reduced significantly !

9/N

What if we suddenly removed all strategic address changes?

- The non-strategic peers who got pushed out of schools would get better peers!

10/N

Summary

- Applicants manipulate their eligibility at schools.

- Manipulation pushes other students out โ†’ who get worse peers.

- See paper for theory, proofs, placebo tests, decomposition of response, and much more.

11/N

Read our paper here arxiv.org/abs/2305.18949

With @mikhoga @andbjn and Lykke Sterll Christensen

12/12

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