Consumers have been benefiting from lower gas prices. Here, prices dip below $2 per gallon at an Exxon station in Woodbridge, Va., on Jan. 5. Saul Loeb/AFP/Getty Images hide caption

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Beyonce performs onstage in 2013 at the Barclays Center in Brooklyn, N.Y. Rob Hoffman/Invision for Parkwood Entertainment hide caption

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Tim Kilroy runs a business from his home in Arlington, Mass. His insurance company quit covering the long-acting Ritalin that helps him manage his ADHD. Ellen Webber for NPR hide caption

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Traders work on the floor of the New York Stock Exchange in New York on Jan. 4. Bloomberg via Getty Images hide caption

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A customer fills up at a gas station in Chillicothe, Ill., in December. Low prices have meant big savings for consumers, but urban planners worry that cheap gas will encourage sprawl. Bloomberg/Bloomberg via Getty Images hide caption

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Passengers walk through the terminal as they head to their flights at Reagan National Airport in Arlington, Va., on Dec. 23, 2015. Saul Loeb/AFP/Getty Images hide caption

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NPR's Weekend in Washington session at the Willard InterContinental Hotel in Washington, D.C., on Oct. 31, 2015. Allison Shelley for NPR hide caption

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President Obama looks over a vehicle on the assembly line with autoworker Jeffrey Cook, during his tour of the Ford Motor Co. Chicago Assembly Plant in 2010. Pablo Martinez Monsivais/AP hide caption

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Harold Pollack's index card of finance tips. Harold Pollack hide caption

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All Tech Considered

Can The Best Financial Tips Fit On An Index Card?

Yes, according to an economist who wrote a blog post that went viral in 2013. Now he has expanded the basics in a book, The Index Card.

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A sign promotes a real estate project last month in Kunming, China. Construction of residential and commercial properties has outpaced demand in China, a factor that some analysts cite in forecasting another global economic downturn. Zhang Peng/LightRocket via Getty Images hide caption

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