Model adequacy. Observed values (red dot) and values predicted by the model from 10,000 simulations (blue cross: mean; black boxplot gives quantiles 2.5%, 25%, 50%, 75%, 97.5%). (A) Number of cases. (B) Number of clusters. (C) Mean cluster size. (D) Maximum cluster size. (E) Probability that a cluster is of size 1. (F) Probability that the size of a cluster is larger than 10. (G) Maximum number of cases over a 2-mo period. (H) Maximum number of clusters over a 2-mo period.