“…These are, to be sure, by no means questions easy to arbitrate. For example, Schulze (1998, 2000), Lanteri (2008) and Elegido (2009) assign such free-marketeering and free-riding trends mostly to nature and self-selection, and so do Rowen and Dietrich (2007), at least predominantly, whereas au contraire Varoufakis (2002Varoufakis ( [1998) and also Núñez, Miranda and Scavia (2007) decide resolutely for education/nurture, Haucap and Just (2003), Sjöberg and Engelberg (2006), López-Pérez and Spiegelman (2012) and Fischer et al (2016) opt instead for a merely "agnostic" position, or really suggest a more "middle-of-the-road" one, recognizing the presence of both natural (self-selection) and nurture (education) influences, although reasserting the higher free-riding proclivity amongst economics students. Goossens and Méon (2010) also subscribe a middle-of-the-road position, although they notice the somewhat mysterious tendency of economics teaching to likewise produce a higher degree of homogeneity within the profession: "we observe that the answers of economics students tend to become more homogeneous over time.…”