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KiVa Antibullying Program KiVa antibullying program is the most widely used and most thoroughly researched bullying prevention program in the world. It has been found to be feasible, possible to roll-out in a large scale (even nationwide in Finland), sustainable, effective, and cost-effective. The effects have been found in several randomized controlled trials, both in Finland and in other countries. After the wide roll-out of the program in Finland in 2009, the prevalence of students bullying others and those bullied by others have been decreasing steadily, according to several independent large-scale surveys.