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Taking Account of Innovation and Quality Change
Taking account of innovation is really difficult. It makes it very hard to compare prices over long enough periods of time that the innovation is quite significant. Many statistical agencies now a just quality adjust the price of things like smartpones or laptops and hablets ar to take account of the improvements they show. And then finally, there's the issue about which people are you talking about? Because the representative consumer is not a real person,. People have very different levels of income and very different spending patterns with those levels of income. For low income consumers, the fact that they've got a very different basket of goods that doesn't have many smart phones and high and lap tops in it is very important