This episode welcomes Jennifer Valentino-DeVries to discuss how smartphone apps are tracking your precise physical location. The data collected is being used for targeted advertising, retail analytics, and financial investments. Your location information can reveal sensitive information, such as who you sleep with, your religious affiliation, or your daily habits.

Jennifer Valentino-DeVries is a technology reporter for The New York Times. She is the lead author of a recent article, “Your Apps Know Where You Were Last Night, and They’re Not Keeping It Secret.” Jennifer has previously worked for The Wall Street Journal, the nonprofit investigative newsroom ProPublica, at the Knight First Amendment Institute at Columbia University, at the Houston Chronicle and at the Associated Press in Thailand. You can follow her on Twitter at @jenvalentino.

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