Answer

The US Bureau of Labor Statistics is the primary source of labor statistics and produces data, reports, white papers, across a wide variety of topics.  

International labor research and data is available via the International Labour Organization

Search for articles or working papers in business databases available on the NYU Business Library's article page. Recommended databases include Business Source Complete, ABI-Inform, Factiva and NexisUni.

There are organizations conducting research in this area. One is McKinsey & Company who publish insights and data on their findings.