The Center for Economic and Policy Research (CEPR) was established in 1999 to promote democratic debate on the most important economic and social issues that affect people's lives. In order for citizens to effectively exercise their voices in a democracy, they should be informed about the problems and choices that they face.
There is a wealth of research at their site. Once at their website, do a search for vacation time. I looked and looked for a group that was pushing for American vacation rights, but didn't find any. Perhaps we need one!