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jerryratcliffe.net
Jerry Ratcliffe
@jerryratcliffe.net
1.1K followers 260 following 300 posts

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 .. more

Videos
Political science 42%
Sociology 30%
Posts Media Videos Starter Packs

jerryratcliffe.net
Jerry Ratcliffe @jerryratcliffe.net · 1d
No, but we can examine other questions alongside the political circumstances. It's not like those other questions are not (rightly) being asked... just about everywhere.

jerryratcliffe.net
Jerry Ratcliffe @jerryratcliffe.net · 2d
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...
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
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jerryratcliffe.net
Jerry Ratcliffe @jerryratcliffe.net · 5d
I agree with the tenor and points of ALL of the interviewees in the article, and reiterated many of the arguments and concerns mentioned by others. But there’s no point in the reporter using the same quote from everyone. I’m sure they are all equally aware of the UK research and it is relevant.

jerryratcliffe.net
Jerry Ratcliffe @jerryratcliffe.net · 25d
Commentary box? You moving upward in that field?
1 1

Reposted by José Pina-Sánchez

jerryratcliffe.net
Jerry Ratcliffe @jerryratcliffe.net · 25d
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.
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jerryratcliffe.net
Jerry Ratcliffe @jerryratcliffe.net · Sep 5
Things get nicked because they are one or more of... CRAVED:
Concealable
Removable
Available
Valuable
Enjoyable
Disposable

(if I remember correctly)
2 4

jerryratcliffe.net
Jerry Ratcliffe @jerryratcliffe.net · Sep 2
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...
Opinion | Forcing People Into Drug Treatment Can Save Their Lives
www.nytimes.com
1

jerryratcliffe.net
Jerry Ratcliffe @jerryratcliffe.net · Sep 2
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
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jerryratcliffe.net
Jerry Ratcliffe @jerryratcliffe.net · Aug 30
Just asked Google how President Trump activated the National Guard.
The response was... not optimal.
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jerryratcliffe.net
Jerry Ratcliffe @jerryratcliffe.net · Aug 28
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.

jerryratcliffe.net
Jerry Ratcliffe @jerryratcliffe.net · Aug 28
Absolutely... they all have long term relationships: David Weisburd, Geoff Alpert, Larry Sherman, Anthony Braga, Wes Skogan, Cynthia Lum, and many more. And they are all practical about the work they do. Helping the departments work on their needs, not just research interests.
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Reposted by Scott L. Althaus

jerryratcliffe.net
Jerry Ratcliffe @jerryratcliffe.net · Aug 24
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...
F.B.I. Plans to Lower Recruiting Standards, Alarming Agents
www.nytimes.com
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Reposted by Jerry H. Ratcliffe

mattashby.com
Matt Ashby @mattashby.com · Aug 18
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
1 1 5

jerryratcliffe.net
Jerry Ratcliffe @jerryratcliffe.net · Aug 9
When I run training this side of the pond, people are fine with that time. It’s so weird.
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jerryratcliffe.net
Jerry Ratcliffe @jerryratcliffe.net · Aug 5
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.
mattashby.com
Matt Ashby @mattashby.com · Aug 5
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/

🧵
A blue hexagon on a white background. Inside the hexagon is a grid of much smaller hexagons. Most of these are dark blue, but some of the small hexagons are lighter blue and spell out the letters SF. On top of the grid is the text sfhotspot.
1

jerryratcliffe.net
Jerry Ratcliffe @jerryratcliffe.net · Aug 5
Fantastic Matt! Even has a very cool logo!
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Reposted by Jerry H. Ratcliffe, Juanjo Medina

mattashby.com
Matt Ashby @mattashby.com · Aug 5
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/

🧵
A blue hexagon on a white background. Inside the hexagon is a grid of much smaller hexagons. Most of these are dark blue, but some of the small hexagons are lighter blue and spell out the letters SF. On top of the grid is the text sfhotspot.
4 14 41

jerryratcliffe.net
Jerry Ratcliffe @jerryratcliffe.net · Aug 1
Is there a list of speakers anywhere Jim?
1

Reposted by Jerry H. Ratcliffe

reducingcrime.com
Reducing Crime @reducingcrime.com · Jul 30
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...
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
1 1

jerryratcliffe.net
Jerry Ratcliffe @jerryratcliffe.net · Jul 28
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.
4

jerryratcliffe.net
Jerry Ratcliffe @jerryratcliffe.net · Jul 21
Alex Murray from the Society of Evidence-Based Policing kicks off the global societies meeting in Cambridge to a packed room.
1

Reposted by Jerry H. Ratcliffe, Brian Keegan, Stuart White

jwmueller-pu.bsky.social
Jan-Werner Mueller @jwmueller-pu.bsky.social · Jul 19
Strong evidence for a captured apex court. Compiled by the excellent Adam Bonica.
6 100 240

jerryratcliffe.net
Jerry Ratcliffe @jerryratcliffe.net · Jul 18
If you are over on instagram, I'm posting sub-90 second snippets about crime and policing.
reducingcrime.com
Reducing Crime @reducingcrime.com · Jul 18
US cities are underpoliced.

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
1

Reposted by Jerry H. Ratcliffe

reducingcrime.com
Reducing Crime @reducingcrime.com · Jul 18
US cities are underpoliced.

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

Reposted by Jerry H. Ratcliffe

reducingcrime.com
Reducing Crime @reducingcrime.com · Jul 13
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...
2 1

jerryratcliffe.net
Jerry Ratcliffe @jerryratcliffe.net · Jul 9
The quality of public order event training. The Gold, Silver, Bronze model of leadership at large events is so simple, yet prevents so much chaos.
P and C Commissioner --> Utter nonsense. Not a thing here.
Open data warehouses --> a US godsend.
18000 agencies. Utter nonsense.
3

jerryratcliffe.net
Jerry Ratcliffe @jerryratcliffe.net · Jul 9
Everything Peter said.
Also... how easy it is to search on arrest in the UK.
See a gun in a car in plain view in the US? Hold the vehicle while you go get a search warrant from a judge. I mean ffs.
The absence of a College of Policing in the US. Yes, the UK one isn't perfect, but still...
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jerryratcliffe.net
Jerry Ratcliffe @jerryratcliffe.net · Jul 6
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
4

jerryratcliffe.net
Jerry Ratcliffe @jerryratcliffe.net · Jul 4
Want short reels on crime and policing? Look no further… than reducingcrime_ on IG 😉
reducingcrime.com
Reducing Crime @reducingcrime.com · Jul 4
New series of short reels over on Instagram at reducingcrime_
Come on over 😉
Here’s one on evidence-based policing.
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Reposted by Jerry H. Ratcliffe

reducingcrime.com
Reducing Crime @reducingcrime.com · Jul 4
New series of short reels over on Instagram at reducingcrime_
Come on over 😉
Here’s one on evidence-based policing.