Prediction markets are having a moment. But what are they actually good for? Economist Robin Hanson has been thinking about this for decades. Long before betting markets went mainstream, he argued they could do more than forecast the future — they could help us make better decisions.

Host Megan McArdle talks with Hanson about how prediction markets work, why they often beat other forms of forecasting and how today’s versions could be improved.

The problem with celebrity politicians

Enough with the doom and gloom — we’re ready to talk about how America can thrive. Hosted by Washington Post Opinion columnist Megan McArdle, “Reasonably Optimistic” is your weekly conversation about how America can get unstuck and build a better future. Stop feeding your rage and start embracing our possibilities. Episodes drop Wednesdays.