This note extends the axiomatic characterization of the "power" success function in fair contests by Skaperdas (1996) to an unfair contest. We show that the results previously obtained are straightforward to generalize; the success function is uniquely characterized by Luce's Choice Axiom...

The mechanism design problem of a monopoly insurer - faced with privately informed insurees - is considered. It is assumed that the insurer cannot commit not to renegotiate (by using the information that customer separa-tion reveals) before contracts are put into force. A solution is offered by...