... 12 8 as example of successful social object, 32 Feedback Profile, 11 2 11 3, 11 5 importance of cooperation on, 11 5 popularity of, 16 reputation system, 11 1 11 4, 11 5efficacy defined, 11 4 designing ... application, 16 6 shared items, 36, 14 7, 14 8 sharing, 14 4 16 2allowing for multiple, 15 7 confirming, 15 6 15 7 conversion funnel for, 17 0 designing form for, 15 4 15 6 facilitating, 14 8 14 9 how ... discovery, 14 8 14 9 interpreting shared message, 15 7 16 0 taking action, 16 0 16 1 using sharing form, 15 4 15 7ways of enabling, 16 1 16 2 sharing forms, 15 4 15 6 sharing funnel, 17 3 Shirky, Clay, 10 0...