Figure 1.
The flow chart has three labelled stages: Identification, Screening, and Included. It starts with studies from databases and registers, number equals 2977: ScienceDirect, number equals 1230; Scopus, number equals 701; Taylor and Francis, number equals 533; Web of Science, number equals 450; J Stor, number equals 25; Google Scholar, number equals 21, Search engine; and Emerald, number equals 17. References removed, number equals 679, includes duplicates identified manually, number equals 10, and duplicates identified by Covidence, number equals 669. Studies screened, number equals 2298, leads to studies excluded, number equals 1924. Studies sought for retrieval, number equals 374, leads to studies assessed for eligibility, number equals 374. Studies excluded, number equals 242, includes not relevant to common institutional ownership, 108; published in B journals, 57; published in C, 7; proceedings and conference papers, 10; not ranked, 41; and overlapping cross ownership or vertical ownership, 19. The final box reads studies included in review, number equals 132.PRISMA
Source: Authors’ own work