Recent studies find ample evidence that monetary and immaterial gifts influence effort in the workplace. We investigate the impacts of monetary gift exchange and of expressions of respect on salespersons' reciprocity when purchasing doner durum, a common lunch snack. Prior to the food’s...

Based on an experimental analysis of a simple monetary economy we argue that a monetary system is more stable than one would expect from individual rationality. We show that positive reciprocity stabilizes the monetary system, provided every participant considers the feedbacks of his choice to...