model
    {
       for( i in 1 : Num ) {
          rc[i] ~ dbin(pc[i], nc[i])
          rt[i] ~ dbin(pt[i], nt[i])
          logit(pc[i]) <- mu[i]
          logit(pt[i]) <- mu[i] + delta[i]
          mu[i] ~ dnorm(0.0,1.0E-5)
          delta[i] ~ dt(d, tau, 4)
       }
       d ~ dnorm(0.0,1.0E-6)
       tau ~ dgamma(0.001,0.001)
       delta.new ~ dt(d, tau, 4)
       sigma <- 1 / sqrt(tau)
}