Do teens really have control over what is cool?

i believe teens do have control over what is cool and what is not. from watching "merchants of cool" they stated that teens are the ones driving most of our economy. That ties into the fact that they are probably the largest consuming age group in our nation. Thus, teens are constantly striving to find whats in and whats not and whatever that is in is "cool." If they didn't constantly search for new "cool" things then they wouldnt be the ones in control of what is cool and not. They have the power to continue on with the trend of being"cool."