@TechReport{iza:izadps:dp8534,
            	author={Conrads, Julian and Reggiani, Tommaso G.},
            	title={The Effect of Communication Channels on Promise-Making and Promise-Keeping},
            	year={2014},
	month={Oct},
            	institution={Institute of Labor Economics (IZA)},
            	address={Bonn},
            	type={IZA Discussion Paper},
            	number={8534},
            	url={https://www.iza.org/publications/dp8534},
	abstract={This paper investigates the effect of different communication channels on promise-making and promise-keeping in a helping situation. Four treatments differ with respect to the communication channel employed to solicit unincentivized cooperation, i.e., face-to-face, phone call and two different sorts of computer-mediated communication. The less anonymous (face-to-face, phone) the interpersonal interaction is due to the different communication channels, the higher the propensity of an agent to make a promise. Treatment effects, however, vanish if we then look at the actual promise-keeping rates across treatments as more anonymous channels (computer-mediated) do not perform relatively worse than more direct channels.},
	keywords={organizational behavior;experimental economics;communication;promises;behavioral ethics},
            }