I tried to add a post about the New Scientist on Sunday. Nothing specific but if you are doing research on incentive strategies I bet there are many articles with examples in their archive. You can get a 7 day trial run at their website - search all their archive as a guest. If you need more time I am a subscriber. either join here and PM me or go to cresby.com and "contact me" from there - but I will need an e-mail address for replies.