Can anyone point me in the direction of some scientific and/or psychological studies focusing on sales patterns, buying habits, etc?  I'm trying to determine why (at times) we see 'sales gaps'.  You know, traffic flowing in yet hours and hours without a sale.
So far, based on my own 'research', I think these 'sales gaps' are a result of one or more of the following factors:
1. Day of the week/month/year
2. Economy
3. Scrub
4. Visa
5. Chargeback levels
What day of the week or month seems to play a significant factor.  Perhaps this is because people get paid end of the week, twice a month, etc.  Time of year seems to be an issue, too (Christmas, tax season, summer slowdown).  The economy, overall, has an effect.  
Then we have "the manipulations".  No, I do not mean this in any ominous or nefarious way, just the normal course of making 'adjustments' to a business over time.  So the scrub and chargeback levels can play major factors.  Even Visa can suppress things in the wake of a Target hack or some such credit catastrophe.
Perhaps this is why brick-and-morter stores have their sales on Tuesdays & Wednesdays?  Weekend specials and Holiday sales, etc?  Yet Adult doesn't seem to follow these 'mainstream' sales trends or tactics and I'm wondering why.  Has anyone tried "Half-Price Tuesdays" or Weekend Specials to try and counteract these sales gaps?  Or are these gaps 'normal' and part of the human experience?  
Thanks for the insights!