Determinants of the timing of social insurance legislation among 18 OECD countries

The purpose of this paper is to determine which theory best explains the development of social insurance programs. The survival analyses of 4 social insurance programs in 18 OECD countries present mixed results. The adoption of each social insurance program is developed and related to a combination of industrialism, modernization, left-wing participation, state autonomy, and international environment. Based on these findings, it is concluded that no single paradigm adequately explains the adoption of each of the social insurance programs. However, the combination of two society-centered approaches - namely, logic of industrialism and political conflict explanation - and a state-centered approach better explains the origin and development of modern social policy than does the international diffusion theory.