In this Article, Professors Kornhauser and Revesz study the settlement-inducing properties of the rules governing the litigation of claims involving multiple defendants. Most importantly, they show that the effects of joint and several liability on the choice between settlement and litigation depend on the correlation of the plaintiff's probabilities of success against the defendants. In the case of two defendants, these probabilities are independent if the outcome of the plaintiff's claim against one defendant does not depend upon whether the plaintiff prevails against, loses to, or settles with the other defendant. In contrast, these probabilities are perfectly correlated if, when the plaintiff litigates against both defendants, it either has to prevail against both or lose to both. Joint and several liability coupled with a pro tanto set-off rule (under which, when the plaintiff settles with one defendant and litigates against the other, its claim against the non-settling defendant is reduced by the amount of the settlement), discourages settlement with both defendants if the plaintiff's probabilities of success are independent. In turn, joint and several liability encourages settlement with at least one defendant if these probabilities are perfectly correlated. The authors also analyze the arguments raised by the courts concerning the relative settlement-inducing properties of the pro tanto set-off rule and the apportioned share set-off rule (under which, when the plaintiff settles with one defendant and litigates against the other, its claim againstthe non-settling defendant is reduced by the apportioned share of the settling defendant). They show that essentially all of these arguments are based on an incomplete or incorrect understanding of the incentives faced by the respective parties.