349 results for search: %EB%8D%B0%EC%9D%B4%ED%8A%B8%EC%95%BC%EC%84%A4%EC%9D%B4%EC%95%BC%EA%B8%B0%E2%99%A4%ED%8C%9D%EC%BD%98%EB%B8%8C%EC%9D%B4%EC%95%8C%E2%99%88%CF%8E%CF%8E%CF%8E%2Cpopkon%2C%C3%97%C5%B7%C6%B6%E2%99%A4%20%EC%95%A0%EB%84%90%EC%98%81%ED%99%94%EC%8A%A4%ED%86%A0%EB%A6%AC%20%ED%83%84%EC%B2%9C%EB%A7%98%ED%95%98%EB%8A%94%E2%96%A1%EB%8F%84%EB%81%BC%EB%85%80%EC%97%89%EB%8D%A9%EC%9D%B42%E2%83%A3%EC%95%A0%EC%95%A1%EB%85%80%EC%98%81%ED%99%94%EC%8A%A4%ED%86%A0%EB%A6%AC%20%E7%86%9A%E9%88%86apostatize%EF%BF%BD%EF%BF%BD%EF%BF%BD%EF%BF%BD%EF%BF%BD%EF%BF%BD%EF%BF%BD%EF%BF%BD%EF%BF%BD%EF%BF%BD%EF%BF%BD%EF%BF%BD%EF%BF%BD%EF%BF%BD%EF%BF%BD%EF%BF%BD%EF%BF%BD%EF%BF%BD%EF%BF%BD%EF%BF%BD%EF%BF%BD%EF%BF%BD%EF%BF%BD%EF%BF%BD/feed/content/colombia/Co-union-violence-paper-response.pdf
How Data Analysis Confirmed the Bias in a Family Screening Tool
In Pittsburgh …
How Predictive Policing Reinforces Bias
Algorithmic tools like PredPol were supposed to reduce bias. But HRDAG has found that racial bias is baked into the data used to train the tools.
How Pretrial Risk Assessment Tools Perpetuate Unfairness
Tools like Compas allegedly help judges predict future criminal activities and eliminate bias. HRDAG and partners showed how the tools recycle bias.
Why raw data doesn’t support analysis of violence
This morning I got a query from a journalist asking for our data from the report we published yesterday. The journalist was hoping to create an interactive infographic to track the number of deaths in the Syrian conflict over time. Our data would not support an analysis like the one proposed, so I wrote this reply.
We can't send you these data because they would be misleading—seriously misleading—for the purpose you describe. Here's why:
What we have is a list of documented deaths, in essence, a highly non-random sample, though a very big one. We like bigger samples because we think that they must be closer to true. The mathematical justif...
Scatter and keep working
Structural Zero Issue 02
July 17, 2025
Part Two of Our Three Part “Gathering the Data” Series. Read part one.
As a statistician, I spend most of my days working at a computer.
Because I work with data about human rights violations, I go to places where I can document evidence of crimes—like disappearances, killings, and torture. So while I may just be working at a computer, those computers can be in places where there is still the potential for violence to emerge.
Over the years, I’ve learned a lot about how to work in countries emerging from conflict. Those lessons seem especially applicable today, ...
HRDAG is hiring – technical lead
If this could be you, let us know. Also, please feel free to pass on this link to great people.
Job Title. Technical lead with a hacker's heart
Location. A cool office in SOMA, San Francisco. You need to be on-site with us.
What we do. The Human Rights Data Analysis Group (HRDAG) develops statistical techniques to measure human rights atrocities. Our work helps bring dictators to justice through data analysis of human rights atrocities around the world. Over more than 20 years, our small team has developed technology and statistical techniques to take disjoint, incomplete, and inaccurate information from conflict zones and process it to identify ...
Press Release, Timor-Leste, February 2006
SILICON VALLEY GROUP USES TECHNOLOGY TO HELP THE TRUTH COMMISSION ANSWER DISPUTED QUESTIONS ABOUT MASSIVE POLITICAL VIOLENCE IN TIMOR-LESTE
Palo Alto, CA, February 9, 2006 – The Benetech® Initiative today released a statistical report detailing widespread and systematic violations in Timor-Leste during the period 1974-1999. Benetech's statistical analysis establishes that at least 102,800 (+/- 11,000) Timorese died as a result of the conflict. Approximately 18,600 (+/- 1000) Timorese were killed or disappeared, while the remainder died due to hunger and illness in excess of what would be expected due to peacetime mortality.
The magnitude of deaths ...
Revisiting the analysis of event size bias in the Iraq Body Count
(This post is co-authored by Patrick Ball and Megan Price)
In a recent article in the SAIS Review of International Affairs, we wrote about "event size bias," the problem that events of different sizes have different probabilities of being reported. In this case, the size of an event is defined by the number of reported victims. Our concern is that not all violent (in this case homicide) events are recorded, that is, some events will have zero sources. Our theory is that events with fewer victims will receive less coverage than events with more victims, and that a higher proportion of small events will have zero sources relative to large events.
The ...
Chad – FAQs
State Coordinated Violence in Chad under Hissène Habré -- [Français]
Press Release, Chad, January 2010
NEW STUDY DOCUMENTS HISSÈNE HABRÉ’S OVERSIGHT OF POLICE PRISONS WHERE THOUSANDS DIED
10th Anniversary of Indictment of Chad Ex-Dictator
January 29, 2010, N’Djamena, Chad and Palo Alto, CA, U.S. - On the 10th anniversary of the first indictment of Hissène Habré in Senegal, the Benetech Human Rights Data Analysis Group (HRDAG) released a new study showing that the former Chadian dictator was well informed of the hundreds of deaths that occurred in prisons operated by his political police. This information could be critical in the long delayed prosecution of Habré who has been accused of killing and systematically torturing thousands of politi...
Truth and Myth in Sierra Leone: An Empirical Analysis of the Conflict, 1991–2000
Tamy Guberek, Daniel Guzmán, Romesh Silva, Kristen Cibelli, Jana Asher, Scott Weikart, Patrick Ball, and Wendy Grossman. “Truth and Myth in Sierra Leone: An Empirical Analysis of the Conflict, 1991–2000″ (pdf). A report by the Benetech Human Rights Data Analysis Group and the American Bar Association. March 28, 2006.
Full Updated Statistical Analysis of Documentation of Killings in the Syrian Arab Republic
Price, Megan, Jeff Klingner, Anas Qtiesh, and Patrick Ball. 2013. Commissioned by the United Nations Office of the High Commissioner for Human Rights (OHCHR). Human Rights Data Analysis Group (June 13). © 2013 HRDAG. Creative Commons BY-NC-SA. [pdf via UN]
Matching the Libro Amarillo to Historical Human Rights Datasets in El Salvador
Patrick Ball (2014). A memo accompanying the release of The Yellow Book. August 20, 2014. © 2014 HRDAG. Creative Commons BY-NC-SA.[pdf español]
Using Cemetery Information in the Search for the Disappeared: Lessons from a Pilot Study in Rionegro, Antioquia
Tamy Guberek, Daniel Guzmán, and Beatriz Vejarano. “Using Cemetery Information in the Search for the Disappeared: Lessons from a Pilot Study in Rionegro, Antioquia.” In Methodological Proposals for Documenting and Searching for Missing Persons in Colombia. (Available in Spanish) © 2010 EQUITAS. All rights reserved.
HRDAG Drops Dropbox
On Wednesday, April 9, the file hosting service Dropbox announced the addition of Condoleezza Rice, former U.S. National Security Advisor and Secretary of State, to their Board of Directors, citing the need for “a leader who could help us expand our global footprint.”
In response to this announcement, HRDAG requested (and rapidly received) a refund for our recent purchase of Dropbox for Business, and will drop the use of their service entirely.
Patrick Ball, HRDAG’s Executive Director stated: “As a human rights organization, we find Condoleezza Rice's complicity in the serious human rights abuses of the Bush administration very worrying. ...
Our Story
Dec 10, 1991
HRDAG is born when Patrick Ball begins database design at the Human Rights Office of the Salvadoran Lutheran Church. The work soon moves to the non-governmental Human Rights Commission (CDHES). The database analysis identified the 100 worst officers in the Salvadoran military — who were forced to resign as part of the peace process.
1994
Patrick publishes A Definit...
Cuentas y mediciones de la criminalidad y de la violencia
Exploración y análisis de los datas para comprender la realidad. Patrick Ball y Michael Reed Hurtado. 2015. Forensis 16, no. 1 (July): 529-545. © 2015 Instituto Nacional de Medicina Legal y Ciencias Forenses (República de Colombia).
Newsletters
2025
14 November, 2025 - Analyzing Chicago's missing person cases
21 October, 2025 - HRDAG takes a stand against tyranny
9 October, 2025 - Unlocking unstructured data and getting it right
30 September, 2025 - Structural Zero 04: Pulling Back the Curtain on LLMs and Policing Data
23 September, 2025 - California’s Racial Justice Act and Police Records Access Project
24 August, 2025 - Structural Zero 03: Without Encryption, My Work Wouldn’t Be Possible
17 July, 2025 - Structural Zero 02: Scatter and keep working
3 June, 2025 - Structural Zero 01: Dictatorships create a lot of data
24 June, 2025 - Breaking through the ...
Multiple Systems Estimation: Collection, Cleaning and Canonicalization of Data
<< Previous post: MSE: The Basics
Q3. What are the steps in an MSE analysis?
Q4. What does data collection look like in the human rights context? What kind of data do you collect?
Q5. [In depth] Do you include unnamed or anonymous victims in the matching process?
Q6. What do you mean by "cleaning" and "canonicalization?"
Q7. [In depth] What are some of the challenges of canonicalization? (more…)
Quantifying Police Misconduct in Louisiana
HRDAG contributes to the project by helping to classify, filter, extract, and standardize the records so that they can be useful in the database.