Autocorrelation time as a function of MCMC iteration steps. The estimated average autocorrelation time is shown in blue (solid line). Also shown are the (red), N_iter∕50 (blue), and N_iter∕100 (black) lines to indicate different possible levels of acceptance for the model parameter estimates. For this work, the model is consideredconverged if and the change in consecutive estimated autocorrelation times τ is less than 1%.