I have a friend who runs a network of blogs ..
When I post content there , a few other sites gets it too and it helps in traffic as I will include " for more read ..... " kind of links.
As I really have no time to create unique articles for this external site , what I will do is use about half my articles content as a prelude followed by links for more info. Ie. it is duplicated text consisting of 50% of the orignal art le on my site except for the link text.
Am wondering will this hurt my seo and prevent me from ranking higher ? The fact remains that this partner does help a chuck of my traffic ....