Effective advertising will create shifts in consumption: consumers will buy more of the advertised products and less of other things.
I don't see how that can happen at the macro level, though.
Basically advertising increases "want" of a product. Advertising all products to increase the "want" of all products (and eventually consumption of all products), definitely sounds like a Keynesian plan...and I think it would be foolish.
It's not the "wanting" of goods that's limiting our prosperity. That's already hardwired in to human nature. The limit is our ability to produce more goods. That comes from time, work, technology, and innovation...all of which require investment and savings and UNDER-consumption in the present.
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