A social choice correspondence (SCC) is virtually implementable if it is e-close (in the probability simplex) to some (exactly) implementable correspondence. Abreu and Sen (1991) proved that, without restriction on the set of alternatives receiving strictly positive probability at equilibrium,...

The adoption of gender quotas inpart y lists has beena voluntary decision by many parties in many countries, and is now a subject of discussioninman y others. The Parity Low passed inF rance in 2001 is particularly interesting because for the first time the quota was set at 50 percent, and the...