Stacey Vanek Smith

Stacey Vanek Smith is the co-host of NPR's The Indicator from Planet Money. She's also a correspondent for Planet Money, where she covers business and economics. In this role, Smith has followed economic stories down the muddy back roads of Oklahoma to buy 100 barrels of oil; flew to Pune, India, to track down the man who pitched the country's dramatic currency devaluation to the prime minister; and spoke with a North Korean woman who made a small fortune smuggling artificial sweetener in from China.

Prior to coming to NPR, Smith worked for Marketplace, where she was a correspondent and fill-in host. While there, Smith was part of a collaboration with The New York Times, where she explored the relationship between money and marriage. She was also part of Marketplace's live shows, where she produced a series of pieces on getting her data mined.

Smith is a native of Idaho and grew up working on her parents' cattle ranch. She is a graduate of Princeton University, where she earned a bachelor's degree in comparative literature and creative writing. She also holds a master's in broadcast journalism from Columbia University.

Most products in this world are vulnerable to creative destruction: as new products are developed, they make old ones obsolete.

But there are some exceptions to this rule. There are products that persist, resisting change while economic evolution continues on without them.

Like the graphing calculator.

75.2 percent. That is the prime age female labor force participation rate, the share of all adult women between the ages of 25 and 54 who are working or looking for work.

In the 70s, 80s, and 90s, the number of women participating in the workforce went up and up and up.But, in 2000, that momentum waned.

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Americans are expected to spend $3.6 trillion on physical goods this year. Amazon and WalMart are competing fiercely to see which of them can get a bigger slice of that pie.

Even with the rise of the Internet, almost all retail sales in America still occur in physical stores, so WalMart's massive network of big box outlets gives it an edge.

But Amazon has a secret weapon: Prime.

Cobalt used to be a byproduct of copper mining, used in everyday, boring stuff like tires and magnets.

But that all changed when someone discovered its ability to stabilize the lithium in batteries for electronics like cell phones.

Now it's become one of the most important and sought after metals on the periodic table. Which has implications for big tech firms like Apple.