Product cycles

I read that the toy YoYo has a 7 year cycle, ie yoyos will be a very
hot selling toy for a brief time every 7 years. It seems that fashion
clothing might have a similar cycle? I do some sport rock and alpine
climbing on occasion and have noticed climbing knickers have surfaced
recently from Patagonia, Purana, and a few other companies. Climbing
knickers were popular back in the 1950s and 60s.

Is there a "rule of thumb" for gauging product cycles? Is there a
reference available that tracks such cycles...ie a book or trade
journal or something that can tell me widgets were popular 10 years ago
and have a 15 year popularity cycle. My thought is to ride the cycle
to profit.

Anthony

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