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Online Grocery prices have been following a similar pattern as the offline ones, with online prices rising slightly faster over the last 5 years cumulatively. Steel and Aluminum tariffs affected Appliances both online and offline. While the CPI rose after the March 2018 tariff implementation, the DPI showed a tampering in the deflation.
Computers shows a slightly steeper decline in prices online vs offline. For some categories the online and offline worlds are starting to blur into one. The CPI and DPI for TVs is remarkably similar. The online prices for Toys have started to exhibit a slower deflation in the last few years, diverging from the CPI. Sporting Goods show a much quicker deflation online, possibly caused by a quicker product turnover online.