The relief of Vienna in vain. Assessing the Implications of Turkish EU-membership for Council of Ministers’ Decision-making. IES WORKING PAPER 1/2011

This research forecasts the implications of Turkish membership for decision-making effectiveness and dynamics within the Council of Ministers of the European Union (EU). Effectiveness is determined in this research by 'passage probability': the chance that a random proposal as put forth by the European Commission (EC) is accepted by the Council of Ministers. Dynamics are determined by means of the Shapley-Shubik Index (SSI), which plots power values of individual member states by forecasting a number of possible EU enlargement scenarios. This study falsifies earlier research by Baldwin and Widgrén.1 It finds that the implications of Turkish EU-membership for EU decision-making efficiency are ambiguous and depend on the number of other candidate states entering the EU alongside Turkey, as well as the timeslot - 2014 or 2020 - at which the accession would take place. Moreover, this study asserts that Turkish EU-accession would result in unequal- but generally negative - power changes among other EU member states, although member states with similar demographic weight will experience comparable changes. Finally, it appears that the larger a EU member state is, the more power it loses if Turkey would join the EU.