Just some links to articles I found online about the benefits of knitting...just click on the article title to get to the page. Most of them are from North America. Someday I'll write about knitting in the Philippines :-)
1. Knitting fad doesn't discriminate
2. Knitting as therapy
3. Knitting provides calming pastime
4. Discover Why Knitting Is A Great And Timeless Hobby That You Can Benefit From
5. 2005 Research Shows: Younger Consumers Spur Increase in Yarn Projects (more of a business profile of the industry in the US)
I'll post some more links later.