When your favorite restaurant is closed on certain days or at a certain time and your craving for it becomes stronger during those periods.
I usually feel the Jones Effect on Sunday because Paseo is closed and I cannot get my Midnight Pork sandwich.
Often used as a sales term to describe how to motivate a potential buyer to buy based on what other people are doing. Also referred to as "Keeping up with the Jones's."
Salesperson: "I just came from Mr. Jones and he liked my product so much he bought three." This is an example of the Jones Effect.