The emergence of international parliamentary institutions
In this chapter, we provide statistical analyses of the establishment and empowerment of international parliamentary institutions (IPIs) in seventy-three relevant international organizations. We analyse whether IPI establishment was systematically associated with the conditions of parliamentarization and find robust and strong positive associations for general purpose and policy scope and robust but somewhat weaker positive correlations for diffusion. By contrast, neither authority nor democracy are systematically associated with the existence of IPIs. Governance failure is either insignificant or has a negative effect on IPI creation. Finally, we explore the correlation of the conditions of parliamentarization with IPI power and find a robust association of IPI authority with IPI legislative competencies.