Every dataset is produced by a set of choices—about technology, language, geography, incentives, and risk. hrdag.substack.com/p/who-is-mis...

Remember: one-third of all Americans killed by strangers in the United States are killed by the police. hrdag.org/violence-in-...

In any statistical research, it's vital to ask who may be missing from the data. Which survivors are too difficult to reach, too afraid of repercussions to tell their stories, or too mistrustful of our research to offer their perspectives?

Not everyone will be willing or able to make a report if they witness a police homicide. Our director of research highlights 3 communities less likely to speak out: folks living on Native American reservations, those without permanent housing, and undocumented people. hrdag.org/2025/06/11/p...

Watch How to Tell the Truth with Statistics, a series exploring how statistical thinking helps us better understand the world around us. www.youtube.com/watch?v=d2Cs...

A new study in Population & Development Review uses statistical analysis to show how bereavement persists in Colombia even decades after the armed conflict ended. onlinelibrary.wiley.com/doi/10.1111/...

Coding agents are not mind readers haskellforall.com/2026/03/a-su...

Every dataset is produced by a set of choices—about technology, language, geography, incentives, and risk. hrdag.substack.com/p/who-is-mis...

The question isn’t just “what does the data say?” It’s “who couldn’t speak?” Read about sampling bias in this month’s Structural Zero. hrdag.substack.com/p/who-is-mis...

Who is missing from the data? That’s the central question in this edition of How to Tell the Truth with Statistics. Watch to learn about South Africa’s transition from apartheid and how data collection shapes knowledge. www.youtube.com/watch?v=d2Cs...

We bump into sampling bias a lot in our work at HRDAG. So we know: Systems of data collection shape knowledge. Every dataset is produced by a set of choices—about technology, language, geography, incentives, and risk.

Check out our most recent episode of "How to Tell the Truth with Statistics," where Dr. Patrick Ball explains sampling bias and talks about his work with South Africa's Truth and Reconciliation Commission. www.youtube.com/watch?v=d2Cs...

Data doesn’t just reflect reality. It reflects who was able or willing to be counted. Fear, distrust, and access all shape the dataset before analysis even begins. hrdag.substack.com/p/who-is-mis...

Every dataset carries the imprint of how it was collected: incentives, geography, language, and risk. Understanding that is the first step toward truth. hrdag.substack.com/p/who-is-mis...

Tuesday, join trina reynolds-tyler and Tarak Shah from Human Rights Data Analysis Group at the @Invisible.Institute office to discuss AI in journalism www.paperlesspost.com/go/83vYxWpCM...

In Chicago? Come to our roundtable discussion on AI in journalism this Tuesday. www.paperlesspost.com/go/83vYxWpCM...

Data doesn’t just reflect reality. It reflects who was able or willing to be counted. Fear, distrust, and access all shape the dataset before analysis even begins. hrdag.substack.com/p/who-is-mis...

Every dataset carries the imprint of how it was collected: incentives, geography, language, and risk. Understanding that is the first step toward truth. hrdag.org/2026/04/02/w...

When a police officer kills someone, they may leave their role—only to get hired at another police department. The National Police Index helps track wandering officers, thanks to @invisible.institute + @hrdag.org + Machine Learning Justice Lab + Innocence & Justice Louisiana. national.cpdp.co

Incredible multi-media report from our friends at @uwchr.bsky.social telling the story of Efraín Arévalo Ibarra: a teacher, father, and union member who was “disappeared” by the Salvadoran government in November 1977. unfinishedsentences.org/reports/efra...

Statisticians love to have perfectly-designed, random samples to study. But reality is messy and many datasets have some inherent bias. That doesn't mean we can't use them. It means we need to acknowledge and account for bias. hrdag.substack.com/p/yes-your-d...

New from our partners at Kilómetro Cero: has Puerto Rico actually reduced excessive and discriminatory police use of force? www.kilometro0.org/informes

The @prisonpolicy.org spotlights data projects tracking police misconduct, use of force, and employment histories—including several open data and public records projects supported by HRDAG's research. www.prisonpolicy.org/blog/2026/01...

Incredible new report from our partners at Kilómetro Cero examines police abuses in Puerto Rico. www.kilometro0.org/informes

Such a powerful event. Happy to help co-host.

If you see a statistic online, try asking two questions: What’s included in the data? What might be missing? In this episode of How to Tell the Truth With Statistics, Dr. Megan Price explains why those questions are the key to spotting bias in data. Watch now: www.youtube.com/watch?v=9Bqp...

13 years ago, Puerto Rico adopted reforms to try to rein in police abuses. Today, Kilómetro O, with assistance from @hrdag.org, published a report showing a pattern of ongoing police violence in Puerto Rico marked by racial bias. www.kilometro0.org/informes

"Wandering officers" - police officers who kill someone, lie, or engage in other unethical behavior, and then move jurisdictions to evade accountability. A new, searchable database is helping track them down. www.youtube.com/watch?v=_mwP...

We’re living in a moment where people either believe everything they see online... or nothing at all. What we need is discernment. In this conversation with Dr. Megan Price, we talk about how understanding bias in data can help us evaluate the numbers we encounter. www.youtube.com/watch?v=9Bqp...

Watch now: families, activists, and data scientists came together for a powerful event in Oakland, CA where we explored how a new database supports efforts toward police accountability. www.youtube.com/watch?v=_mwP...

The AI industry doesn’t have good tools for measuring reliability, or even a good definition of reliability. @sayash.bsky.social and @randomwalker.bsky.social seek to define reliability in a functionally useful way. www.normaltech.ai/p/new-paper-...

In a year when truth felt fragile, @hrdag.org doubled down on a simple idea: evidence matters. Our newly published annual review shows how we bring statistical rigor and scientific values to the defense of human rights—including here in the United States. hrdag.org/2026/03/03/h...

Today we mourn the assassination of feminist and human rights defender Yanar Mohammed, killed in her own home March 2 in Baghdad. We join the human rights community in calling for justice and an independent investigation. www.gc4hr.org/assassinatio...

On International Women's Day, we join our partners around the world in decrying the assassination of Iraqi human rights defender Yanar Mohammed. Her death is part of a broader pattern of attacks targeting activists, journalists, and human rights defenders in Iraq. www.gc4hr.org/assassinatio...

Menlo Park’s gang database included over 100 people listed as “Taliban” members, 93% of whom were Black. One of them is using California's Racial Justice Act to fight back. www.rjaction.org/post/straigh...

In 377 HIV clinics in Malawi, statistical sampling is key to assessing the data quality on patient treatment cards. Done right, sampling can be a powerful tool for catching errors. statmodeling.stat.columbia.edu/2026/02/24/s...

What happens when the patterns we’ve studied in other countries start showing up closer to home? HRDAG’s 2025 review reflects on how the rise of tyranny in the United States is changing our work and our threat model. Read it here: hrdag.org/2026/03/03/h...

Where do police officers go after leaving their roles in the wake of killing someone or sexual misconduct? You can find out with the National Police Index—the newly updated data tool from @invisible.institute + @hrdag.org + Machine Learning Justice Lab + Innocence & Justice Louisiana.

A new paper by @sayash.bsky.social and @randomwalker.bsky.social examines what “reliability” means in an AI context. They propose consistency, robustness, calibration, and safety, and they define these in operationally useful ways. A worthy read! www.normaltech.ai/p/new-paper-...

"What is the role of transparency in advancing police accountability and justice?" asks trina reynolds-tyler of @invisible.institute moderating HRDAG's event in Oakland, CA exploring how we use data about police misconduct to work toward justice. www.youtube.com/watch?v=YGaE...

Check out Beneath the Surface, a data science project that investigates the intersections of gender-based violence and policing, created by @invisible.institute with support from HRDAG. www.btsurface.com

Thank you for your leadership @macfound.org. Human rights should be at the heart of the AI discourse. www.macfound.org/press/press-...

We’re transforming mountains of unstructured police and human rights data into rigorous statistical evidence—demonstrating how data science can support accountability. hrdag.org/ml/

AI is becoming ubiquitous, but what about the underlying datasets being used for training that AI? Here's what statisticians mean when they talk about "biased data" and why it matters. hrdag.org/2026/02/11/y...

Data science brings a rigor and analytical depth that can transform human rights practice. www.openglobalrights.org/why-data-sci...

Random sampling, bias, population parameters—here's a bootcamp on statistics so you can be armed with knowledge when you encounter data in the wild. hrdag.substack.com/p/yes-your-d...

Congratulations to Ayyub Ibrahim, recipient of the Electronic Access award from the Society of Professional Journalists, Northern California! spjnorcal.org/2026/02/14/s...

We are grateful that @prisonpolicy.org spotlighted our work in their recent round-up of data projects tracking police abuses. www.prisonpolicy.org/blog/2026/01...

Our most recent newsletter unpacks what statisticians mean when they talk about "bias," including: ✅ Disclosure bias ✅ Event size bias ✅ Selection bias Check it out here: hrdag.substack.com/p/yes-your-d...

Check out HRDAG's presentations to learn how statistics and rigorous data gathering can be used to reveal the truth of state violence. hrdag.org/talks-discus...