Before revision:  In this perspective, instead of considering a single R_0, we consider a distribution of reproductive numbers R and devise a simple Bayesian hierarchical model that builds upon current methods for estimating the R to integrate its heterogeneity.
After revision:  In this perspective, instead of considering a single , fixed R, we model the reproductive number as a distribution sampled from a simple Bayesian hierarchical model that builds upon current methods for estimating the R to integrate its heterogeneity.