Think Tanks can influence the public agenda defining problems, explore new fields of action, and are capable of influencing policy makers with alternative solutions and the mobilization of the public opinion. They participate, thus, in the policies life-cycle, in particular the identification and formulation phases, and the impact assessment.
At the end of 2015, there were 6.846 Think Tanks in the world, 28% of them (1.931) in North America (Mexico, Canada and US) and of them 1.835 in the United States. In Europe, 1.770 Think Tanks (26%) were counted (TCCSP, University of Pennsylvania).