Congratulations on securing funding for your research! If you have not explored it just yet, this RG link on your topic can help to find studies and suggestions for your research: https://www.researchgate.net/topic/economy
My own idea of the sharing economy is best described by having some examples. As you can see, the purpose is to reduce costs, taste the products, relax, learn and work together.
1. A lift club is the simplest example.
2. A stokvel. https://en.wikipedia.org/wiki/Stokvel
3. Music lovers create a music evening club, where one person presents some new CDs and DVD, so that the others need not make the same purchase.
4. Mothers create a bookclub, where each member take turns to buy a book, read it first, present it to the club and circulate it.
5. University students form a study group, one member hires a recorder, another provides a venue, another provides the eats, another hires a video, and they study it together.
6. Scholars create a journal club, where each member takes turns to each buy a journal title, read it first, summarise the best articles and present it before circulating it.
7. Researchers meet via ResearchGate, and share their papers.
8. I answer questions posed on ResearchGate, knowing that others will answer mine.
9. I compile a coffee table book from Creative-Commons sources and publish it free of charge via Amazon's Ebooks.
10. I publish an E-textbook on Kindle, and happily give away the first 10% as a sample, (knowing that this will attract many to buy the e-textbook. )
when looking for sharing economy paper remember that there are a synonyms galore: collaborative consumption, gig economy peer economy and many others. It is useful to use them as well in the search engines.
anyway I would start from the web of science, as this provides you with quality papers.