Do Market Conditions Affect Gift Exchange? Evidence from Experimental Markets

Jordi Brandts and Gary Charness

University of California at Santa Barbara, Economics Working Paper Series from Department of Economics, UC Santa Barbara

Abstract: We study whether behavior in experimental gift-exchange markets with repeated interaction is affected by market conditions. One issue we consider is the impact of competitive imbalance, by varying whether there is an excess supply of firms or an excess supply of workers in the market. Workers might react differently to high wage offers in the two cases, as it may seem that firms are ‘forced to be generous’ by competitive pressures when there are excess firms. Our second issue concerns the effect of requiring a minimum wage, another sense in which a firm may seem ‘forced to be generous’. We impose a minimum wage in the market with an excess supply of workers, and study the overall effect on wages and productivity. While our data show strong deviations from the standard game-theoretic prediction, the patterns of behavior are not fully consistent with either kindness-based models of positive reciprocity or models of distributional utility. The state of competition does not appear to have strong effects in our data; however, there is some evidence of lower productivity when a minimum wage is imposed. Finally, we also present data from single-period sessions that show substantial gift exchange even without repeated interactions.

Date: 2003-03-01
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