n 1964 lee iacocca and ford came out with the mustang. go back to gdp data. it boosted growth.happening again. apple itself has sold billions and billions and billions of dollars of equipment that just didn't exist years ago. apple itself has been more important than stimulus. melissa: economists say there are two ways to stimulate the economy, two schools of thought. government does it on demand side or innovation and technology gets people to go out and buy and creates productivity in the economy which is what we're talking about here. some argued if you spend money on the iphone, it is money that you would have spent going out to dipper and doing something different. so it is not really increasing economy. it is displacing other spending . what do you say to that? >> that is what paul krugman has said. that is funny and defending estimate wlus. i has to -- stimulus. has to say if a private company does it can't be real. buy a tractor, go back 100 years, and that means you don't buy horses does that mean the economy is not any better off? no, we're better off because we're mo