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Statistics
Patrick Ball (2004). “Statistics,” in Encyclopedia of Genocide and Crimes Against Humanity. ed. by Dinah L. Shelton, Howard Adelman, Frank Chalk, Alexandre Kiss & William A. Schabas. Farmington Hills, MI: Thomson Gale.
Killings and Refugee Flow in Kosovo, March–June, 1999 (A report to ICTY).
Patrick Ball, Wendy Betts, Fritz Scheuren, Jana Dudukovic, and Jana Asher. Killings and Refugee Flow in Kosovo, March–June, 1999 (A report to ICTY). © 2002 American Association for the Advancement of Science and American Bar Association Central and East European Law Initiative. [full text]
Using Math and Science to Count Killings in Syria
In this afternoon "Lightning Talk" at RightsCon 2014, Megan Price spoke about the importance of using models to adjust for variability when reporting human rights violations and mentioned innovative tools that can be used for tracking abuses.
RIGHTSCON
March 4, 2014
San Francisco, California
Link to RightsCon program
Back to Talks
HRDAG Retreat 2016
What do you get when you bring seven statisticians, one quantitative political scientist, a writer, a computer scientist, and an administrator together for four days in a vacation rental on California’s Russian River? A lot of code, a technical paper and book chapter revised, another paper started, a great hike in the Redwoods, descriptions of food poisoning and crash landings in war zones, and a lot of talk about feelings.
Did I mention feelings? On the first evening of the annual retreat of the Human Rights Data Analysis Group, executive director Megan Price asked us to go around the room and share how we were feeling on arrival. The request ...
How Data Analysis Reconsiders Deaths During Arrest
The US Bureau of Justice collects information on deaths during arrest, and HRDAG determined the efforts were incomplete. The conclusion: Approximately one third of all Americans killed by strangers are killed by police.
Liberian TRC Data and Data Dictionary
The files linked on this page contain the data used in the calculations presented in Benetech's report to the Liberian Truth and Reconciliation Commission entitled "Descriptive Statistics From Statements to the Liberian Truth and Reconciliation Commission." In accordance with Benetech's Memorandum of Understanding with the TRC, these data are published on the Internet so that others can use the material to replicate our findings and continue research on past human rights violations in Liberia. In order to protect the privacy of the people who suffered, the information in the files below contains no personal identifying information about the victims or ...
A geeky deep-dive: database deduplication to identify victims of human rights violations
In our work, we merge many databases to figure out how many people have been killed in violent conflict. Merging is a lot harder than you might think.
Many of the database records refer to the same people--the records are duplicated. We want to identify and link all the records that refer to the same victims so that each victim is counted only once, and so that we can use the structure of overlapping records to do multiple systems estimation.
Merging records that refer to the same person is called entity resolution, database deduplication, or record linkage. For definitive overviews of the field, see Scheuren, Herzog, and Winkler, Data Quality ...
Introducing Structural Zero: a New Monthly Newsletter
A monthly newsletter exploring how math and science help us understand the world.
Hi, I’m Patrick Ball. I’m a statistician, which is a type of scientist that uses mathematical analysis to try to figure out what we do and don’t know about data sets. I’m also a human rights advocate; I work with groups all over the world to help survivors in post-conflict countries understand what really happened and bring justice and accountability. It’s incredible work, and I feel grateful to do it.
I want to invite you to check out a new newsletter, Structural Zero. It’s written by me and my colleagues Megan Price, Bailey Passmore, Tarak Shah, and ...
HRDAG Report on Disappeared Tamils in Army Custody in Sri Lanka
HRDAG has published a report about the 500 Tamils who disappeared while in Army custody in Sri Lanka in 2009.
Welcoming our new Technical Lead
After almost two months of searching for the perfect fit, we’re very pleased to announce that Josh Shadlen has joined HRDAG as our new technical lead. Finding Josh was no easy feat. We were looking for what many people would call a “data scientist,” that is, someone with expertise in both computer science and statistics. These days, “data science” is one of the hottest fields out there.
Bringing the perfect mix of academic depth and thoughtful reflection, Josh stood out for us. With prior jobs including gigs at Silicon Valley startups and Twitter, he’s got high-level (more…)
Donate to HRDAG with a Donor Advised Fund
HRDAG is pleased to accept donations to our nonprofit via Donor Advised Funds. We’ve published step-by-step directions to make donating through a DAF simple and fast. Check out the directions now or contact us at info@hrdag.org if you have any questions.
October 9 is Donor Advised Fund Day—a recently established awareness day that encourages DAF holders to activate their funds by recommending charities to receive support. You can participate by donating to HRDAG via a Donor Advised Fund or read on to learn more.
What is a Donor Advised Fund?
A Donor-Advised Fund (DAF) is an easy, flexible way to support charities while taking advantage of ...
Trove to IPFS
IPFS is a peer-to-peer storage network that promotes the resiliency, immutability, and auditability of data. This README explains code written to shepherd the files from janky external USB drives to IPFS.
How Machine Learning Protects Whistle-Blowers in Staten Island
People filed complaints against NYPD officers, and HRDAG went above and beyond to protect the privacy of the people who reported the offenses.
How Data Processing Uncovers Misconduct in Use of Force in Puerto Rico
In Puerto Rico, some people are more likely to be victims of police violence than others. HRDAG processed a flood of data to illuminate the racial bias.
Announcing New HRDAG Advisory Board Member
Elizabeth Eagen of the Citizens and Technology Lab at Cornell University will expand the HRDAG advisory board.
Our People
The Human Rights Data Analysis Group is composed of a diverse group of board members, full-time staff, and consultants. Employing a multidisciplinary approach, we work with experts in the fields of computer science, software development, mathematical and applied statistics, and demography.
Advisory Board
As a nonprofit organization, our Advisory Board serves as our governing body. This board helps us to make decisions, keeps us on track with our mission and goals, and oversees the organization in legal and logistical matters.
David Banks, Professor, Statistical Science, Duke University
Kim Keller, Executive Director, The Keller Foundation
Dinah ...
Newsletters
2025
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 noise with evidence
19 May, 2025 - Structural Zero 00: Introd...
HRDAG’s Year in Review: 2022
This past year at HRDAG has been about continuing efforts to uncover the truth.
Welcome!
As of today, the Human Rights Data Analysis Group (HRDAG) is an independent* non-profit! It's been a long time coming, and we're delighted to have gotten to this point. HRDAG is a non-profit, non-partisan organization that applies rigorous science to the analysis of human rights violations around the world; for more information, see our About Us page.
Benetech has spun out the scientific and statistical part of the Human Rights Program to HRDAG. The spinout includes (as staff) me -- Patrick Ball -- and Dr Megan Price, as well as our many part-time scientific and field consultants (a list is here). The software and technology component of our work -- ...