Buying frenzies in which a fi rm intentionally undersupplies a product during its initial launch phase are a common practice within several industries such as electronics (cell phones, video games, game consoles), luxury cars, and fashion goods. We develop a dynamic model of buying frenzies that...

Quantity surcharges occur when retailers carry a product in two sizes and offer a promotion on the small size: the large size then costs more per unit than the small one. When quantity surcharges occur, sales of the large size decline only slightly even though the same quantity can be purchased...