If you're looking for broad background information, you might want to search the Libraries' catalog for books on the subject, or you could conduct a literature search for articles in either the Business Source Complete or EconLIT databases. You could also look at news coverage in Factiva. In IBISWorld you can keyword search for industry reports that mention these keywords, or you could read their specialized report on third-party outsourcing industry report 'Business Process Outsourcing Services'. Lastly, Statista likely has relevant statistics on the topic; their content can also be keyword searched.
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