We searched our four definitions in Wikipedia, but we found out that actually "collaborative consumption" and "collaborative economy" have been redirected to the page of "Sharing economy"; "on demand" query, instead, was redirected to the page "Access economy". We explored the history of these articles. To get the three pages aborted and redirected to others, we used them as queries and found them as "(Redirected from 'query')" in the redirection target page.
Once reached all the articles, the next step was the investigation of the related history sections. Here we used the Digital Methods Initiative tool called "Wikipedia History Flow Companion". It allows to download a dataset with any changes that has been made to the pages, reporting for each of them information about it: edit date and time, user, user page, size (number of bytes changed), comment left by the user and his geographic position. Through the comments, we were able to distinguish edits in: article creations, redirection to other pages, add of references and add of "see also" links.