> Clearly, the only reason you picked 2007 at all is the iPhone debuted that year. The productivity figures show decline from trend in 2007 with no recovery si

> Clearly, the only reason you picked 2007 at all is the iPhone debuted that year. The productivity figures show decline from trend in 2007 with no recovery since. Presumably 2007 was chosen for that reason. This is also the time in popular culture when things were thought to have started to go all wrong. Whereas the iPhone wasn't widely available until 2008 with the release of the iPhone 3G. The original iPhone was only available to a small beta testing group (~1 million people) in the USA. While it is technically true that some people had iPhones in their hand in 2007, it is highly unlikely that tiny number of people "destroyed the world" by it. Clearly something happened before the iPhone.