The study measured primary home device use based on click-stream data from comscore. This requires interpretation with the following considerations: - The data

The study measured primary home device use based on click-stream data from comscore. This requires interpretation with the following considerations: - The dataset they used is from a commercial entity with its own vested interests - Secondary home device and non-home device use is not included; An increase in substitutes to the primary home-device should lead to lower primary home-device use - Only click-stream data that can be gathered by comscore can be included - Sampling bias of comscore (paper does not describe correction for this)