The international economic crisis has hit Europe, especially its 'periphery', remarkably hard, and has had deep consequences at the economic and political levels. Since its onset, parties in parliament (especially those in opposition) have found themselves faced with a dilemma: choosing between the need to cooperate with the government in order to overcome the crisis and the opportunity provided by a weakened government to stress their adversarial position, so as to be more easily re-elected and possibly get into power. What have they decided to do? This is a crucial question, for which...