 
                Frank Windmeijer (2011). How important is pro-social behaviour in the delivery of public services? Journal of Public Economics.
 
                Frank Windmeijer (2011). How important is pro-social behaviour in the delivery of public services? Journal of Public Economics.
 
                 
                 
                 
                 
                 
                 
                 
                 
                 
                Francesco Lippi (2011). Optimal price setting with observation and menu costs Quarterly Journal of Economics.
 
                 
                 
                 
                 
                 
                 
                