>He estimates that iPhone sales are adding one-quarter to one-third of a percentage point to the annualized growth rate of the gross domestic product. That's a

>He estimates that iPhone sales are adding one-quarter to one-third of a percentage point to the annualized growth rate of the gross domestic product. That's amazing. This means that iPhones account for 0.25-0.33% of all consumption in the US. (reasoning behind this: annualized growth rate is (gdp for year / gdp for previous year) - 1, so to account for 0.25 percentage points of growth means to be 0.25 percent of gdp)