On 11 May 2001, readers of the Berliner Zeitung were invited to participate in an ultimatum bargaining experiment played in the strategy vector mode: each participant chooses not only how much (s)he demands of the DM1,000 pie but also which of the nine possible offers of DM100, 200,..., 900...

Recent research on ultimatum bargaining, the fact that children often confront and use ultimatums, and theories of developmental psychology all combine to suggest that studying children's ultimatum behavior will be particularly enlightening, both theoretically and with respect to the development...

We present a field experiment to assess the effect of own and peer wage variations on actual work effort of employees with hourly wages. Work effort neither reacts to an increase of the own wage, nor to a positive or negative peer comparison. This result seems at odds with numerous laboratory...