1. National higher courts and processes of ratification of European Union treaties 2. Constructing a model of judicial behavior : theoretical framework 3. EU primary law before the guardians of the constitution : courts' decisions on the merits 4. Kompetenz-kompetenz, the doctrine of the last say : the interpretative decisions of courts 5. The legal dimension : assessing judicial behaviour from the viewpoint of legal rules 6. The political dimension : a pro-ratification context 7. The judicial dimension : institutional design and decisional dynamics 8. Judicial behaviour as a result of complex causation : a QCA approach to the juridical dynamics of treaty ratification 9. Conclusions and some final reflections 10. Methodological appendix.