Interesting.
Men leave old media, revenues down.
Men go to new media, revenues up.
Madison avenues conclusion? ignore men.
At the peak merchants are not having any problem moving merchandise so they reduce advertising to improve profits.
As the cycle continues business starts to fall off and profits go down. Merchants look for ways to cut costs. The easest cost to cut is advertising. So they cut advertising.
Then at the bottom of the cycle, with shelves filled full of merchandise that is not moving, they realise they have to do something to encourage sales. So they increase advertising and the cycle begins all over again.