Freakonomics Radio

Recorded live in Los Angeles. Guests include Mayor Eric Garcetti, the "Earthquake Lady," the head of the Port of L.A., and a scientist with NASA's Planetary Protection team. With co-host Angela Duckworth, fact-checker Mike Maughan, and the worldwide debut of Luis Guerra and the Freakonomics Radio Orchestra.

There are a lot of barriers to changing your mind: ego, overconfidence, inertia ? and cost. Politicians who flip-flop get mocked; family and friends who cross tribal borders are shunned. But shouldn't we be encouraging people to change their minds? And how can we get better at it ourselves?

Whether it's a giant infrastructure plan or a humble kitchen renovation, it'll inevitably take way too long and cost way too much. That's because you suffer from "the planning fallacy." (You also have an "optimism bias" and a bad case of overconfidence.) But don't worry: we've got the solution.

The revolution in home DNA testing is giving consumers important, possibly life-changing information. It's also building a gigantic database that could lead to medical breakthroughs. But how will you deal with upsetting news? What if your privacy is compromised? And are you prepared to have your DNA monetized? We speak with Anne Wojcicki, founder and C.E.O. of 23andMe.

As the cost of college skyrocketed, it created a debt burden that's putting a drag on the economy. One possible solution: shifting the risk of debt away from students and onto investors looking for a cut of the graduates' earning power.

Humans have been having kids forever, so why are modern parents so bewildered? The economist Emily Oster marshals the evidence on the most contentious topics ? breastfeeding and sleep training, vaccines and screen time ? and tells her fellow parents to calm the heck down.

Humans, it has long been thought, are the only animal to engage in economic activity. But what if we've had it exactly backward?

The banana used to be a luxury good. Now it's the most popular fruit in the U.S. and elsewhere. But the production efficiencies that made it so cheap have also made it vulnerable to a deadly fungus that may wipe out the one variety most of us eat. Scientists do have a way to save it ? but will Big Banana let them?

Daniel Ek, a 23-year-old Swede who grew up on pirated music, made the record labels an offer they couldn't refuse: a legal platform to stream all the world's music. Spotify reversed the labels' fortunes, made Ek rich, and thrilled millions of music fans. But what has it done for all those musicians stuck in the long tail?

As cities become ever-more expensive, politicians and housing advocates keep calling for rent control. Economists think that's a terrible idea. They say it helps a small (albeit noisy) group of renters, but keeps overall rents artificially high by disincentivizing new construction. So what happens next?