NPR.

This is The Indicator from Planet Money.

I'm Waylon Wong.

And I'm Adrienne Ma, and this is the Indicator Quiz.

Will we test your knowledge of topics that we've been covering on the show?

And you, dear listener, can play along too.

We haven't had one of these in a while, and it's the middle of the year, so this one is going to cover a little bit of everything from the past six months. Today, we have listener Jim Umbach, who works as an urban planner for the city of Fernley in Nevada. He's also an author. Welcome to the show, Jim. Thank you. I'm so happy to be here. It's been a while since I've taken an economics quiz, but I think I'm going to do great and make my entire area proud.

Okay, well, time to brush up. Jim, you're going to be playing today for your choice of NPR merch. Yes, we've got shirts and mugs and so many options.

And merch, by the way, is available to purchase on shopmpr.org.

That's just a little plug before the quiz.

And now I think it's time to play.

That's all coming up after the break.

All right, it is indicatoricator quiz time with our guest, Jim.

Let's start with an easy question before heading into some of our other quiz segments.

Adrian here is your helping hand if you need a hint.

That's right. I am, you know, your phone or friend. All right. Question number one.

The entrepreneur Azaraskin recently testified in court about the addictive nature of social media

apps. Which interface feature is he widely credited with creating? Is it A, the like button,

B, the poke feature, C, video auto play, or D, infinite scroll?

I'm going to have to say it is the infinite scroll.

Very confident, and you are correct.

Woo, yes. Azaraz can recently talk to Adrian for an episode, and you are correct. Woo! Yes.

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