Conditioning on what? Heterogeneous contributions and conditional cooperation by Björn Hartig, Bernd Irlenbusch and Felix Kölle is now published in the Journal of Behavioral and Experimental Economics - Volume 55 (2015) pp 48-64.

Highlights

• We test how different information regimes affect the willingness to cooperate of 'conditional cooperators'.
• Cooperation is higher when individual rather than average information is provided.
• This effect is particularly strong when others’ contributions are relatively uniform.
• On average, contributions are lower the higher the variation in others' contributions.
• Conditional cooperators are more likely to follow a low rather than high contributor.