READ ME for: Thöni, C; Gächter, S; 2015. Peer effects and social preferences in voluntary cooperation. Journal of Economic Psychology, 48: 72-88. 10.1016/j.joep.2015.03.001

The analysis was done with the statistical software package STATA (http://www.stata.com/). The attached material was run on 15.0. 

The package ThoeniGaechter2015JoEP.zip contains four files
1)	readme.rtf
2)	The data set in csv format: file ThoeniGaechter2015JoEP.csv
3)	The data set in STATA format: file ThoeniGaechter2015JoEP.dta
4)	The STATA code for the statistical analysis reported in the article ThoeniGaechter2015JoEP.do

List of variables (a detailed description, data sources and references are in Supplementary Information)
sessionid	Session ID	
subject	Subject no.	
group	Group no.	
mgroup	Matching group no.	
productivity	High productivity (D)	
belief	Belief (D)	
experienced	Experienced (D)	
zh	Zurich (D)	
eit	Treatment dummy for EIT (D)	
role	Role	
w	Wage	
ei	Initial effort	
eihat	Revised effort	
ej	Co-agent's initial effort	
ejbelief	Belief about ej	
profit	Profit	
exp1_nonselfish	Non-selfish in Exp1 (D)