sotw1

sotw2

Eu(Ak)

A1 (election of P1)

u(S11)

u(S12)

E u ( A 1 ) = s o t w j S O T W p j u ( S 1 j )

A2 (election of P2)

u(S21)

u(S22)

E u ( A 2 ) = s o t w j S O T W p j u ( S 2 j )

An (election of Pn)

u(Sn1)

u(Sn2)

E u ( A n ) = s o t w j S O T W p j u ( S n j )