The Action Meeting on 9-11 April 2014 in Maastricht was hosted by Maastricht University. It included the 4th MC Meeting and a scientific programme put together by WG1 (voting) and WG4 (matching). Invited talks were given by Albin Erlanson (Lund), Serge Galam (Paris), Christian Geist (Munich), Bettina Klaus (Lausanne), Flip Klijn (Barcelona), Szilvia Papai (Montreal), Friedrich Pukelsheim (Augsburg), Baharak Rastegari (Glasgow), Jay Sethuraman (New York), Attila Tasnadi (Budapest), and Alexander Westkamp (Maastricht). The local organiser was Hans Peters. Full information is available at the Maastricht 2014 website.