We examine agent failures in weighted voting games. In our cooperative
game model, R-WVG, each agent has a weight and a survival probability, and
the value of an agent coalition is the probability that its surviving members would
have a total weight exceeding a threshold. We propose algorithms for computing
the value of a coalition, finding stable payoff allocations, and estimating the
power of agents. We provide simulation results showing that on average the stability
level of a game increases as the failure probabilities of the agents increase.
This conforms to several recent results showing that failures increase stability in
cooperative games.