Control F

President Donald Trump has turbo-powered immigration enforcement efforts in the U.S. As of March 2026, Immigration and Customs Enforcement (ICE) was detaining approximately 60,000 people. The agency is now the best-funded law enforcement organization in the country. The Trump administration claims that expanded immigration enforcement will reduce crime. But does the data support that? Teo tells Clare about the recent history of imm...

Sports gambling ads are proliferating: In stadiums, on TV broadcasts and on apps across the internet. The multi-billion dollar industry has exploded in the past five years. So what happens when that momentum is translated into gambling on politics, culture, and even war? Clare tells Teo about the meteoric rise of sports gambling, and the way it’s changing norms about betting on real world events. 

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Only 11 percent of rental units in the United States allow “big” dogs – but what does that mean? Is a labrador a big dog? How about a pit bull? And why does your landlord care so much, anyway? Inspired by the story of one dog who ran afoul of an HOA rule, Clare tells Teo why so many dogs end up booted from loving homes to shelters and how advocates are trying to stop it. 

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Someone who has to survive without a regular place to sleep at night is vulnerable to danger, illness, and the more insidious harm of being shunned. One way to quantify the harm caused by homelessness is to understand how many people are experiencing it. How do we do that? We try to count them, and one city is leading the charge on a new approach. Teo tells Clare how it could change our view of our unhoused neighbors. 

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In 1964, then-President Lyndon B. Johnson declared war on poverty. Johnson wanted to lift the nation’s poor into a better life, via programs like food stamps, Medicare and Medicaid. But more than 60 years later, our country is still grappling with how to alleviate the challenges of poverty – including how we measure it.

In this episode, Teo explains how the Federal Poverty Line is calculated and what it has to do with J...

The United States spends more on health care than any other country on earth. Most health care products in the U.S. cost at least twice what other countries pay, sometimes up to ten times as much. And everyday Americans are often left footing the bill, grappling with sky-high premiums and medical debt. Clare tells Teo how the forces in our health care system keep costs high, and what you can do about the (possibly giant) number at ...

When a storm rolls through your area, odds are you’ll have days of warning and hour-by-hour information about what to expect. That accuracy is thanks to a global data network that turns real-time measurements into forecasts that can stretch weeks. But it wasn’t always this way. 

Clare tells Teo how weather went from a guessing game to a precise science, saving lives in the process. 

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Your credit score is your economic destiny. It determines where you can live, what you can buy, and sometimes even what job you can get. But how do credit bureaus come up with these all-encompassing numbers? Teo tells Clare about the data that credit scores feed on, and how little we really know about how they're calculated.

Have a question about how our world works? Want to know more about credit scores? Email the Control F team a...

Control F is a podcast about data — hard, fuzzy, surprising, and sometimes unreliable data — and all the ways it influences our daily lives. In each episode, we dig deep on a topic and search through research, algorithms, and assumptions to bring you insights on how stuff works. In a world ruled by numbers, Control F reads between the (spreadsheet) lines to find the bigger story.

Control F launches on January 14, with n...