Fair group decisions in investment planning

The participation of several decision-makers is common in long-term investment planning. This paper describes an approach that supports these (cooperative) group decisions. First, the board members have to agree on the objectives and then each individually finds his/her preferred investment programme. Next, the system accordingly derives objective weights and proposes fair compromise candidates. Finally, the decision board may choose one of the suggestions or refer to them in following negotiations. In particular, the approach requires no a-priori assumptions about the decision-makers' preferences and, furthermore, explicitely takes into consideration fairness as an important feature of stable group decisions.