Jerry Ratcliffe
@jerryratcliffe.net
College prof, ex-UK cop, host of the Reducing Crime podcast, scientific advisor to the IACP. In my spare time, I try not to crash planes.
Google Scholar: https://scholar.google.com/citations?user=BOJIm0QAAAAJ
ORCID: https://orcid.org/0000-0002-0730-6761
Google Scholar: https://scholar.google.com/citations?user=BOJIm0QAAAAJ
ORCID: https://orcid.org/0000-0002-0730-6761
BlueSky filesize limits are a p.i.t.a, but if you want weekly summaries of key crime and policing studies and ideas, please follow reducingcrime_ over at instagram, or Reducing Crime on LinkedIn.
If you are on Instagram there's a 90 second summary of the Philadelphia Predictive Policing Experiment findings.
(BlueSky doesn't let us post 90 second videos because the file size is too large)
www.instagram.com/reel/DPjPS_Q...
(BlueSky doesn't let us post 90 second videos because the file size is too large)
www.instagram.com/reel/DPjPS_Q...
Login • Instagram
Welcome back to Instagram. Sign in to check out what your friends, family & interests have been capturing & sharing around the world.
www.instagram.com
November 19, 2025 at 10:26 PM
BlueSky filesize limits are a p.i.t.a, but if you want weekly summaries of key crime and policing studies and ideas, please follow reducingcrime_ over at instagram, or Reducing Crime on LinkedIn.
This week is the ASC conference, so here’s mentions of “abolish” in recent programs:
2021 1 program, 5 submissions
2022 1 submission
2023 4 programs, 5 subs
2024 5 programs, 3 subs
2025 2 programs (not incl. one about abolishing nuclear weapons)
Is this idea's rampant stupidity finally receding?
2021 1 program, 5 submissions
2022 1 submission
2023 4 programs, 5 subs
2024 5 programs, 3 subs
2025 2 programs (not incl. one about abolishing nuclear weapons)
Is this idea's rampant stupidity finally receding?
November 11, 2025 at 2:26 AM
This week is the ASC conference, so here’s mentions of “abolish” in recent programs:
2021 1 program, 5 submissions
2022 1 submission
2023 4 programs, 5 subs
2024 5 programs, 3 subs
2025 2 programs (not incl. one about abolishing nuclear weapons)
Is this idea's rampant stupidity finally receding?
2021 1 program, 5 submissions
2022 1 submission
2023 4 programs, 5 subs
2024 5 programs, 3 subs
2025 2 programs (not incl. one about abolishing nuclear weapons)
Is this idea's rampant stupidity finally receding?
The American Society of Criminology conference is next week and this is your annual reminder that most of the presentations will likely be 💩
Here are some ways to be less 💩
www.jerryratcliffe.net/post/i-want-...
Here are some ways to be less 💩
www.jerryratcliffe.net/post/i-want-...
I want a refund for your conference presentation
There is a problem with academic criminal justice and criminology, and it’s getting worse.I’ve attended several conferences and meetings in the last three months. And the standard of presentation is d...
www.jerryratcliffe.net
November 8, 2025 at 12:36 PM
The American Society of Criminology conference is next week and this is your annual reminder that most of the presentations will likely be 💩
Here are some ways to be less 💩
www.jerryratcliffe.net/post/i-want-...
Here are some ways to be less 💩
www.jerryratcliffe.net/post/i-want-...
If you aren't following the work of @benbradford.bsky.social then you are missing out on thoughtful insights into policing and public safety.
Apple: apple.co/4opeJDD
Spotify: bit.ly/3WBBJ6f
Apple: apple.co/4opeJDD
Spotify: bit.ly/3WBBJ6f
November 5, 2025 at 1:08 PM
If you aren't following the work of @benbradford.bsky.social then you are missing out on thoughtful insights into policing and public safety.
Apple: apple.co/4opeJDD
Spotify: bit.ly/3WBBJ6f
Apple: apple.co/4opeJDD
Spotify: bit.ly/3WBBJ6f
An interesting thought experiment here, and ... if you follow the logic of the thread, raises broader and potentially significant questions about the validity of 'lived experience' as a viable criminological research tool.
I've been wondering recently how many racist police officers were racist when they joined, and whether part of the issue is logical fallacies arising from having a lot of contact with very narrow sections of society in places with which they may not otherwise be familiar.
October 11, 2025 at 2:30 PM
An interesting thought experiment here, and ... if you follow the logic of the thread, raises broader and potentially significant questions about the validity of 'lived experience' as a viable criminological research tool.
Featuring a little of my chat with @martinkaste.bsky.social on the crime reduction implications of the deployment of National Guard in Washington DC.
www.npr.org/2025/10/02/n...
www.npr.org/2025/10/02/n...
National Guard presence may deter crime, but experts warn of the long-term costs
As President Trump ramps up efforts to send federal officers and troops into cities, criminologists are watching closely. Are the feds doing this in a smart way?
www.npr.org
October 7, 2025 at 1:53 AM
Featuring a little of my chat with @martinkaste.bsky.social on the crime reduction implications of the deployment of National Guard in Washington DC.
www.npr.org/2025/10/02/n...
www.npr.org/2025/10/02/n...
To contextualize this week’s political commentary, of the 2,647 identified extremist violent offenders in the US since 2000, far-right extremists were more than 7 times more represented in the data than far-left extremists.
* No, this isn’t to negate the abhorrent shooting this week.
* No, this isn’t to negate the abhorrent shooting this week.
September 14, 2025 at 12:06 PM
To contextualize this week’s political commentary, of the 2,647 identified extremist violent offenders in the US since 2000, far-right extremists were more than 7 times more represented in the data than far-left extremists.
* No, this isn’t to negate the abhorrent shooting this week.
* No, this isn’t to negate the abhorrent shooting this week.
A must-read op-ed by Keith Humphreys in the NY Times, covers both how harm reduction advocates abandoned communities (hello Kensington in Philadelphia) and why mandating drug treatment will help many.
His @reducingcrime.com podcast ep is a must: apple.co/4ne9Jko
www.nytimes.com/2025/09/02/o...
His @reducingcrime.com podcast ep is a must: apple.co/4ne9Jko
www.nytimes.com/2025/09/02/o...
Opinion | Forcing People Into Drug Treatment Can Save Their Lives
www.nytimes.com
September 2, 2025 at 1:25 PM
A must-read op-ed by Keith Humphreys in the NY Times, covers both how harm reduction advocates abandoned communities (hello Kensington in Philadelphia) and why mandating drug treatment will help many.
His @reducingcrime.com podcast ep is a must: apple.co/4ne9Jko
www.nytimes.com/2025/09/02/o...
His @reducingcrime.com podcast ep is a must: apple.co/4ne9Jko
www.nytimes.com/2025/09/02/o...
In the new episode of the @reducingcrime.com podcast, @mattbland.bsky.social - former analyst and now evidence-based policing guru - explains the value he got from socializing with police officers.
Apple: apple.co/4g269aC
Spotify: bit.ly/4oXiQYc
Apple: apple.co/4g269aC
Spotify: bit.ly/4oXiQYc
September 2, 2025 at 12:42 AM
In the new episode of the @reducingcrime.com podcast, @mattbland.bsky.social - former analyst and now evidence-based policing guru - explains the value he got from socializing with police officers.
Apple: apple.co/4g269aC
Spotify: bit.ly/4oXiQYc
Apple: apple.co/4g269aC
Spotify: bit.ly/4oXiQYc
Just asked Google how President Trump activated the National Guard.
The response was... not optimal.
The response was... not optimal.
August 30, 2025 at 2:36 PM
Just asked Google how President Trump activated the National Guard.
The response was... not optimal.
The response was... not optimal.
Fun chat covering Matt's experiences as an analyst in the National Intelligence Model and where #evidence-based_policing is right now.
Tons of great advice for crime analysts working with police departments.
Tons of great advice for crime analysts working with police departments.
August 28, 2025 at 2:08 PM
Fun chat covering Matt's experiences as an analyst in the National Intelligence Model and where #evidence-based_policing is right now.
Tons of great advice for crime analysts working with police departments.
Tons of great advice for crime analysts working with police departments.
New Federal Bureau of Investigation (FBI) agent training to go from 18 weeks to 8 weeks, and dropping the degree requirement?
If the plan is to make the FBI a laughing stock, this is the way to do it.
www.nytimes.com/2025/08/21/u...
If the plan is to make the FBI a laughing stock, this is the way to do it.
www.nytimes.com/2025/08/21/u...
F.B.I. Plans to Lower Recruiting Standards, Alarming Agents
www.nytimes.com
August 24, 2025 at 12:18 AM
New Federal Bureau of Investigation (FBI) agent training to go from 18 weeks to 8 weeks, and dropping the degree requirement?
If the plan is to make the FBI a laughing stock, this is the way to do it.
www.nytimes.com/2025/08/21/u...
If the plan is to make the FBI a laughing stock, this is the way to do it.
www.nytimes.com/2025/08/21/u...
Reposted by Jerry Ratcliffe
When working out if people from different ethnic groups are stopped by police disproportionately, it really matters what population you compare the number of stops to. This paper by @jerryratcliffe.net compares several good and bad options:
Police stops and naïve denominators
A comparison of the racial composition of police stops to the entire population of a city or jurisdiction is frequently cited as evidence of racial bias in proactive policework. This article argues that...
doi.org
August 18, 2025 at 2:01 PM
When working out if people from different ethnic groups are stopped by police disproportionately, it really matters what population you compare the number of stops to. This paper by @jerryratcliffe.net compares several good and bad options:
With fiscal austerity affecting many police departments, the costs of analytical software can be seen as prohibitive. Here, @mattashby.com is doing a considerable service to the crime analysis community with this new #Rstat package.
Announcing sfhotspot, an #RStats package to make it as easy as possible to identify and map concentrations of crime (or concentrations of any other points in space).
Introduction: lesscrime.info/post/sfhotsp...
Package website: pkgs.lesscrime.info/sfhotspot/
🧵
Introduction: lesscrime.info/post/sfhotsp...
Package website: pkgs.lesscrime.info/sfhotspot/
🧵
August 5, 2025 at 1:30 PM
With fiscal austerity affecting many police departments, the costs of analytical software can be seen as prohibitive. Here, @mattashby.com is doing a considerable service to the crime analysis community with this new #Rstat package.
Reposted by Jerry Ratcliffe
If you are over on IG I’ve started a new series of short crime and policing- related reels like this one on procedurally-just speeding tickets reducing speeding.
www.instagram.com/reel/DLzfdoI...
www.instagram.com/reel/DLzfdoI...
Login • Instagram
Welcome back to Instagram. Sign in to check out what your friends, family & interests have been capturing & sharing around the world.
www.instagram.com
July 30, 2025 at 4:19 PM
If you are over on IG I’ve started a new series of short crime and policing- related reels like this one on procedurally-just speeding tickets reducing speeding.
www.instagram.com/reel/DLzfdoI...
www.instagram.com/reel/DLzfdoI...
If you have civilian staff in your police department, you will want to forward this podcast episode to them. Packed with tips on how to survive as a senior civilian leader in policing, from one of the best.
July 28, 2025 at 12:19 PM
If you have civilian staff in your police department, you will want to forward this podcast episode to them. Packed with tips on how to survive as a senior civilian leader in policing, from one of the best.
Alex Murray from the Society of Evidence-Based Policing kicks off the global societies meeting in Cambridge to a packed room.
July 21, 2025 at 8:44 AM
Alex Murray from the Society of Evidence-Based Policing kicks off the global societies meeting in Cambridge to a packed room.
Reposted by Jerry Ratcliffe
Strong evidence for a captured apex court. Compiled by the excellent Adam Bonica.
July 19, 2025 at 9:03 PM
Strong evidence for a captured apex court. Compiled by the excellent Adam Bonica.
If you are over on instagram, I'm posting sub-90 second snippets about crime and policing.
July 18, 2025 at 12:42 PM
If you are over on instagram, I'm posting sub-90 second snippets about crime and policing.
Reposted by Jerry Ratcliffe
If you are over on IG I’ve started a new series of short crime and policing- related reels like this one: www.instagram.com/reel/DLpeOhk...
July 13, 2025 at 5:58 PM
If you are over on IG I’ve started a new series of short crime and policing- related reels like this one: www.instagram.com/reel/DLpeOhk...
Are US cities underpoliced? Yes, according to two studies by Aaron Chalfin. See the findings in about 60 seconds www.instagram.com/reel/DLpeOhk...
Login • Instagram
Welcome back to Instagram. Sign in to check out what your friends, family & interests have been capturing & sharing around the world.
www.instagram.com
July 6, 2025 at 12:00 PM
Are US cities underpoliced? Yes, according to two studies by Aaron Chalfin. See the findings in about 60 seconds www.instagram.com/reel/DLpeOhk...
Reposted by Jerry Ratcliffe
Fantastic episode of the @reducingcrime.com podcast about rapid video response to domestic abuse calls.
It’s particularly interesting because so many people said the intervention wouldn’t work, but (contrary to ‘common sense’) it did.
It’s particularly interesting because so many people said the intervention wouldn’t work, but (contrary to ‘common sense’) it did.
#84 (Stacey Rothwell)
Stacey Rothwell is the director of innovation action across seven police forces leading ERIN, the Eastern Region Innovation Network in the UK. After a career as a sworn officer, including as a detecti
soundcloud.com
July 3, 2025 at 2:03 PM
Fantastic episode of the @reducingcrime.com podcast about rapid video response to domestic abuse calls.
It’s particularly interesting because so many people said the intervention wouldn’t work, but (contrary to ‘common sense’) it did.
It’s particularly interesting because so many people said the intervention wouldn’t work, but (contrary to ‘common sense’) it did.
Want short reels on crime and policing? Look no further… than reducingcrime_ on IG 😉
New series of short reels over on Instagram at reducingcrime_
Come on over 😉
Here’s one on evidence-based policing.
Come on over 😉
Here’s one on evidence-based policing.
July 4, 2025 at 9:02 PM
Want short reels on crime and policing? Look no further… than reducingcrime_ on IG 😉
New series of short reels over on Instagram at reducingcrime_
Come on over 😉
Come on over 😉
If you are over on IG I’ve started a new series of short crime and policing- related reels … reducingcrime_
July 4, 2025 at 9:30 AM
New series of short reels over on Instagram at reducingcrime_
Come on over 😉
Come on over 😉
Reposted by Jerry Ratcliffe
Shane Johnson and Kate Bowers are awarded the 2025 Environmental Criminology and Crime analysis award.
Award and motivation delivered by Marcus Felson.
#ecca2025
Award and motivation delivered by Marcus Felson.
#ecca2025
July 2, 2025 at 12:42 AM
Shane Johnson and Kate Bowers are awarded the 2025 Environmental Criminology and Crime analysis award.
Award and motivation delivered by Marcus Felson.
#ecca2025
Award and motivation delivered by Marcus Felson.
#ecca2025