Freire, A. & Belchior, Ana Maria (2015). Ideological representation in Portugal: Congruence between deputies and voters in terms of their left-right placement and its substantive meaning. In André Freire & José Manuel Leite Viegas  (Ed.), Leadership, and Political Representation in Portugal: Essays on Parliament, Media, Voluntary Associations, Parties, Politics, and Voting. NY: Ed. Edwin Mellen.