The nature and predictive power of preferences: global evidence / Armin Falk (University of Bonn and IZA), Anke Becker (University of Bonn), Thomas Dohmen (University of Bonn and IZA), Benjamin Enke (University of Bonn), David Huffman (University of Pittsburgh and IZA), Uwe Sunde (University of Munich and IZA). Bonn : IZA, 2015