If they had to, I'm sure retailers would use pricing to force a flatter purchasing pattern. If prices doubled by November, you'd shop in August right? As well

If they had to, I'm sure retailers would use pricing to force a flatter purchasing pattern. If prices doubled by November, you'd shop in August right? As well as holidays there are sales. Do sales increase total yearly spend for the industry as a whole? Otherise, couldn't retailers just agree to stop doing them?