Inter-connect standards increase choices; e.g., in cardiac pacemakers, the IS-1 standard enables the “pulse generator” from six manufacturers to be combined with the “lead set” from the other five to add up to thirty additional mixed-brand pacemakers. However, observed assortment...

Analyzing a large weekly retail transaction price dataset, we uncover a surprising regularity small price increases occur more frequently than small price decreases for price changes of up to about 10 cents, while there is no such asymmetry for larger price changes. The asymmetry holds for the...