Most people assume, if implicitly, that there is a substantial element of uniformity in our IP system. At first blush, our copyright and patent laws extend a (presumably) uniform set of rights to (presumably) uniform authors and inventors, who can then sue (presumably) uniform unauthorized users. Scholarship for some time now has already noted that the bundle of rights is not actually uniform, and has theorized on the optimal tailoring of rights to particular industries and subject-matters. More recently the literature has started to unpack the implicit assumption of creator uniformity using data on the demographics of authors and inventors. Statistically speaking, the data has shown that creators of different races, genders and ages diverge in the rate and direction of their creative efforts. In this new and exciting article, Libson and Parchomovsky begin to unpack the assumption of user uniformity using user demographics.