Look for items that aren't being marketed well, that have poorer-quality photographs or that are mislabeled.
These popular items once were marketed under the Nik-L-Nip brand name, derived by combining the original cost of the candy (nickel) with the wax bottle-opening technique (nipping off the top).
If item (x) is marketed much earlier than item (z) is, then item (x) is associated with higher support compared with itemset (xz).
All of the items will also be marketed on the company's Web site.
Some of these single-serving items (meaning, they are marketed for one person) contain more than 1,000 calories.
"The message that children get when books are marketed with other items is that a book in and of itself isn't enough," Ms. Linn said.
Marks & Spencer has agreed to make the packaging of all of its toys gender neutral by spring 2014, after customers complained that it was marketing items according to stereotypes.
Amazon, of course, similarly prompts its customers to buy such items, but Grove Collaborative is marketing to a slightly narrower demographic, that of people who want only all-natural products.
The company is marketing the scarce item at low-key events for 30 to 50 luxury-car owners.
Given the IRS' very inclusive barter income rules, Dibbell says, even gamers who have no interest in turning gold pieces into dollars could eventually be subject to taxation, since the items being traded have fair market values.
