The multivariate logistic transform is a reparameterisation of cell probabilities in terms of marginal logistic contrasts. It is known that an arbitrary set of logistic contrasts may not correspond to a valid joint distribution. In this paper we present an efficient algorithm for detecting...

type="main" xml:id="rssc12066-abs-0001" <title type="main">Summary</title> <p>We consider a problem of reducing the expected number of treatment failures in trials where the probability of response to treatment is close to 1 and treatments are compared on the basis of the log-odds ratio. We propose a new class of urn designs...</p>