Nuisance property ordinances deputize landlords to internalize public safety externalities. But are there unintended consequences? @AriaGoles finds that NuPOs reduce the rate at which domestic violence is reported and may increase domestic homicides.👇
ariagolestani.io/wp-content/upl…
NuPOs recognize that place managers are sometimes better situated than law enforcement to address public safety issues that have ties to specific properties. There is a great deal of writing about this especially by John Eck. See e.g., oxfordhandbooks.com/view/10.1093/o…
But a concern is that NuPOs may incentivize landlords to retaliate against tenants who report crimes to law enforcement, thus raising the cost of crime reporting. This is especially worrisome for domestic violence where the cost of reporting is already high.
Aria considers what happens to domestic assaults when NuPOs are passed and finds that NuPOs reduce the rate at which residential violence is reported to police (panel A) but not the rate of reporting non-residential assaults (panel B).
Aria also finds that 911 calls for domestic violence decrease after passage of a NuPO.
How about domestic homicides? There is some evidence that these rise after passage of a NuPO (panel A). Effects are less clear for other types of homicides (panel B).
In some cases, landlords will be able to abate crime more efficiently than police. But this paper suggests that policymakers should think carefully about the tradeoffs when passing NuPOs. NuPOs may have fewer unintended consequences in commercial than residential settings.
Aria is an Econ job market candidate at UC Irvine where he is advised by @ProfEmilyOwens, @kerri_raissian, Matthew Freedman and Damon Clark. Learn more about Aria's research here: ariagolestani.io

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More from @AaronChalfin

29 Nov
The University of Chicago Crime Lab is in the market for a new Research Director! This would be an ideal job for someone who will finish their PhD in Spring 2022. As a Crime Lab alumnus, I could not recommend this job more highly. Short thread 👇
urbanlabs.uchicago.edu/attachments/09… Image
For someone who wants to do research that is tightly linked to policy decisions, this is an incredible opportunity. You will have access to phenomenal data and you will have the opportunity to talk to and learn from high-level policymakers as well as people working on the ground.
You'll have the opportunity to work with a fantastic cast of crime & education researchers who are doing cutting-edge crime research including @NourARazzak, @PankaBencsik, @gregstod and Ashna Arora in addition to the invaluable mentorship of Jens Ludwig and Jon Guryan.
Read 5 tweets
29 Nov
Do domestic violence shelters keep the victims of family violence safe? @lrschechter has a new paper which studies the impact of opening a shelter where there were none previously. She finds that DV shelters appreciably reduce intimate partner homicides.👇
dropbox.com/s/lqfkv2lx223v… Image
This is a difficult outcome to study because, at a population level, DV homicides are rare. Lauren is also extraordinarily careful to avoid some pitfalls that arise from using a traditional TWFE model which reduces statistical power.
Nevertheless she detects a large impact of shelters on DV homicides with female victims, finding that the presence of a shelter reduces these particular DV homicides by more than 60%. Image
Read 7 tweets
27 Nov
There is a bunch of new research out there on the effects of body-worn cameras (BWCs) worn by police officers. Short thread summarizing four new papers 👇
Experimental evidence using precinct-level random assignment that BWCs reduced citizen complaints and increased the reporting of stops by NYC police officers by Anthony Braga, John MacDonald and James McCabe:
onlinelibrary.wiley.com/doi/abs/10.111…
Evidence from the same experiment with the NYPD that BWCs do not improve satisfaction with police officers, based on a survey of people who have had contact with the police. Paper by Anthony Braga, John MacDonald and @lmbar16: link.springer.com/article/10.100…
Read 7 tweets
26 Nov
What happened when the Chicago created a program to divert drug arrestees to treatment? New research by Ashna Arora & @PankaBencsik finds that more people got treatment and public safety improved.
drive.google.com/file/d/1QSxrv7… 👇
When asked how social planners should address the opioid crisis and addiction more generally, many people will evangelize the benefits of treatment. But how do you get the most inframarginal people into treatment? It's a challenge.
For better or worse, this is a population that often finds itself ensnared in the criminal justice system. Can the CJ system be a conduit to get more people into treatment and can these efforts ultimately improve public safety? Ashna & Panka find that Chicago was able to do so.
Read 7 tweets
21 Jun
Here is a thread in which I try to summarize what we know thus far about the cause of the recent rise in gun violence in the U.S. In my view, we can rule out some stories but the picture is not very clear and, as far as I'm concerned, many theories remain in play. 👇
1. The U.S. homicide rate began to tick up slowly in 2015, especially in some cities (e.g., Philadelphia and Chicago). So, for a number of cities, the homicide increase represents a speeding up of a pre-existing trend. Explore the data here: jacobdkaplan.com/crime.html#sta…
2. Via @ZaidJilani, this extraordinary rise in homicide is fairly unique to the U.S. We don't see the same thing in Canada or Mexico or even El Salvador. This is inconsistent with general explanations like economic hardship and pandemic-induced stress. inquiremore.com/p/stop-blaming…
Read 17 tweets
15 Jun
How many complaints against police officers can be abated by terminating a few bad apples? Jacob Kaplan and I consider this question in a new paper that is now published in @CPPJournal. We believe the answer is likely to be "not a lot." onlinelibrary.wiley.com/doi/10.1111/17…
Thread 👇
You've probably heard that a very small number of officers are responsible for a very large share of misconduct or citizen complaints. Estimates vary quite a bit but I've seen estimates like 2% of officers account for half of all use of force complaints.
The naive conclusion from calculations like this is that if only we could identify who these bad apple officers are, we could make a considerable dent in addressing police misconduct by terminating (or re-assigning) them.
Read 18 tweets

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