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USA

.hrdag-algo-button { margin-bottom: 25px; a { border-radius: 18px; background-color: #4f81ed; padding: 8px 18px; text-decoration: none; color: white; border: 1px solid transparent; } a:hover { color: #4f81ed; border: 1px solid #4f81ed; background-color: transparent; } } HRDAG’s analysis and expertise continues to deepen the national conversation about police violence and criminal legal reform in the United States. In 2015 we began by considering undocumented victims of police violence, relying on the same methodological approach we’ve tested internationally for ...

Africa

Chad Liberia Sierra Leone South Africa

Announcing New HRDAG Advisory Board Member

Cynthia Conti-Cook came on board in March, 2025.

Data coding and inter-rater reliability (IRR)

Data coding is the process of converting unstructured information, such as a narrative testimony, into discrete facts such as names and roles of actors (victims, witnesses, perpetrators) in crimes, as well as the date and place of act. Data coding must not discard or distort information. When more than one person is identifying, classifying and counting the elements reported in a qualitative source, the results of what they find may differ slightly based on each individual's interpretation and care in doing the coding. These differences can be measured by measuring IRR (inter-rater reliability). We give the same source document to several coders and ...

Happy Ada Lovelace Day!

As an organization that uses science to advocate for human rights, the goals and issues represented by Ada Lovelace Day are very near and dear to our hearts.  Additionally, we are lucky to work with and be advised by some pretty kick-ass ladies in STEM (see our People page to learn more about these amazing women (and men)). I brainstormed a list of women I could write about, as Finding Ada suggests we celebrate today by blogging about a STEM heroine.  I considered Anita Borg (she has her own institute!), who advocated tirelessly for women in computer science.  I thought about Sally Wyatt, keynote speaker and organizer of the fascinating workshop...

Claudia Carolina López Taks

Field Consultant Carolina Lopéz has worked with the Archivo Histórico de la Policía Nacional (AHPN) in Guatemala for eight years, and is currently a member of the Archive  Technical Coordination team. A professional working within the social sciences, she prefers using alternative research on past practices to develop an understanding of the present. Her work consists primarily of monitoring and creating strategies to systematize, track and create process controls. She also has thorough knowledge of management of historical archive documents. Since 2006, Carolina has worked in quantitative research at the AHPN with HRDAG team members Patrick ...

Connect with HRDAG

If you’d like to stay informed about HRDAG events, blogposts, and news, connect with us on Twitter, Facebook or through our RSS feed. We also have a LinkedIn page. You may contact us directly via email at info @ hrdag.org. A note for persons in search of assistance with specific human rights cases: We are very sorry for your troubles and your suffering; however, HRDAG does not take on casework. If you need help with a human rights case, you might consider requesting it from the International Committee of the Red Cross (www.icrc.org). Photo: U.S. National Archives

Scanning Documents to Uncover Police Violence

Administrative paperwork generated by police departments can hold evidence of police violence, but can present unique challenges for data processing.

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How Data Scraping Provides Insights into Immigrant Arrests

In Washington State, some law enforcement officers illegally tip off ICE and CBP for civil immigration arrests. HRDAG helped identify where the problematic practices occurred.

Home Alt

<iframe src="https://www.youtube.com/embed/MfThopD7L1Y?list=PL8mc5VYrQH_Nx9jSWF2rYEgQhHyVobk6s" width="560" height="315" frameborder="0" allowfullscreen="allowfullscreen"></iframe>Kristian Lum, lead statistician at HRDAG | <em>Predictive Policing: Bias In, Bias Out</em> | 56 mins

Welcoming Our New HRDAG Data Scientist

Bailey joined HRDAG as a data scientist in 2022.

HRDAG Welcomes New Data Science Fellow

Alanna Flores joins HRDAG for the summer as a Data Science Fellow.

Insights Sessions

You are invited to Illuminating the dark through data science: Stories from the Human Rights Data Analysis Group Thursday, 3 June 2021, 12–1pm PDT A conversation with HRDAG advisory board member Margot Gerritsen, executive director Megan Price, statistician Maria Gargiulo, and field consultant Anita Gohdes. The Human Rights Data Analysis Group uses data to help the world understand human stories. In this intimate, virtual conversation, executive director Megan Price and other inspiring HRDAG data scientists will share stories about how their data analysis has powered truth commissions and grassroots justice organizations, and held human rights ...

The John Maddox Prize for Patrick Ball

Congratulations to Patrick on this well deserved award!

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Why Collecting Data In Conflict Zones Is Invaluable—And Nearly Impossible

HRDAG's work in Kosovo and in the Guatemalan trial of General José Efraín Ríos Montt is discussed in this article. Megan Price, HRDAG's director of research, is quoted. “There is a wide variety of things that could be considered data,” she says. From the story: Price’s main data analysis tool requires fitting a model to the data that ends up in her lap. That way, she can see whether there are gaps in the data and what more needs to be included. The method, called multiple systems estimation analysis, lets Price look at patterns across lists of data, for example, lists of victims. The resulting model reveals how much data is missing, to a ...

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.


On the Use of Sample Surveys and Multiple Systems Estimations in Assessing Large-Scale Human Rights Violations: Recent Experiences from Timor-Leste.

Romesh Silva and Patrick Ball. “On the Use of Sample Surveys and Multiple Systems Estimations in Assessing Large-Scale Human Rights Violations: Recent Experiences from Timor-Leste.” Proceedings of the Social Statistics Section – Joint Statistical Meetings. New York, (USA). August, 2005.


Free Software

Patrick Ball (2005). “Free Software,” in The Encyclopedia of Science, Technology, and Ethics. ed. by Carl Mitcham. Farmington Hills, MI: Thomson Gale.


Our work has been used by truth commissions, international criminal tribunals, and non-governmental human rights organizations. We have worked with partners on projects on five continents.

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