Update: US inflation soars - a podcast by BBC World Service

The US annual inflation rate rose to 7% in December, a figure not seen since 1982. Jayne Schaber lives in New York state and tells us about her experiences when out shopping, and we get a historical perspective on the latest figures from Professor Jason Furman of Harvard University, who was the top economic adviser to the White House during the eight years of the Obama presidency. Plus, a new report from the app monitoring firm App Annie indicates that smartphone users are spending an average of 4 hours and 48 minutes each day on their devices; we hear from Lexy Sydow, Head of Insights at the app.

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