Vanderweele, Tyler J.; Tan, Zhiqiang - In: Biometrika 99 (2012) 1, pp. 115-126
We give a definition of a bounded edge within the causal directed acyclic graph framework. A bounded edge generalizes the notion of a signed edge and is defined in terms of bounds on a ratio of survivor probabilities. We derive rules concerning the propagation of bounds. Bounds on causal effects...