#' @param n Number of individuals
#' @param p Vector of K(-1) populations relative proportions (sum (<)= 1)
#' @param β Vectors of model parameters for each population, of size dxK
#' @param n Number of individuals
#' @param p Vector of K(-1) populations relative proportions (sum (<)= 1)
#' @param β Vectors of model parameters for each population, of size dxK