The protocol here is simple: we took the four definitions we discussed in the previous chapter, and used them as queries for our three research fields. These fields are represented by three different websites with their related search engines: Google Trends (for websites), Google Scholar (for academic field), and LexisNexis (for press articles). All the four queries were put in each database and were exported results year by year, since 2005 until 2015. In Scholar and LexisNexis you can choose the publication year of your results; in Google search, instead, you need to write a string like after:2004/04/16 before:2004/04/18 after your query.
More precisely, on LexisNexis and Scholar we looked for articles containing the entire phrase "sharing economy" OR "collaborative economy" OR "collaborative consumption" OR "on-demand economy", in order to consider the entire semantic field. In both of the databases, we only looked for articles containing these phrases in their title. This is how we filtered useful articles from those just citing these phrases in their full text, but actually talking about different issues. We took Google Trends for websites analysis because it would explain how relevant each query has been, year by year on Google search.