Over the past decade, the common belief has been that flexible labor relations have surged in popularity worldwide and are, in fact, threatening the position of traditional, open-ended labor contracts. The Flexibility@work 2013 report shows that this is not the case. There is no clear evidence of a worldwide trend towards a growing share of formal flexible labor relations over the last decade. Nor is there any evidence of a trade-off between different forms of flexible labor.
The full report (PDF file) here.