A useful survey of co-operative working from the US here or download the PDF here.
“Our survey results confirm that the co-operative model is a promising strategy for mitigating individualized patterns of work, democratizing work relationships, and providing satisfying work in creative industries contexts. Co-ops are not a magic solution to systemic work problems. But the co-op model – in conjunction with other pro-worker policies and organizations – holds potential to democratically remake work in ways that have yet to be fully realized, or widely tested, in creative industries.”
Update: For a surprisingly good and comprehensive portrait, see also The Co-operative Alternative and the Creative Industries [pdf] here for useful data on everything from earnings to the quality of internal democracy in creative sector co-ops.