A product's position on the shop shelf relative to other products in the category is an important yet understated factor affecting product demand. We present a parametric demand model that interprets the location of shelf facings as a set of (potentially irregular) lattice data and thereafter...

As software ages, it is increasingly unable to leverage new technologies and fulfill evolving user requirements. Firms producing software products therefore get an opportunity to introduce and sell upgrades. Our research looks at the optimal intervals between upgrades, and whether these...