Users play an increasingly important role in product and service innovation. Finding the right users can require substantial search effort. Network searches are increasingly popular in searching for rare lead users. In these searches, implicit and inexact referrals have been found to comprise a...

Time use survey data has been used to model household activities beyond market transactions. Accordingly, measures such as the ‘goods intensity of household activities’ and the ‘energy and carbon intensity of household activities’ have been derived. In this paper, we build on this...