Discrete - Time Branching

of its members. The process of these macro-individuals has independently reproducing elements, as different sibships are independent of each other. The numbers of “macro children” need, however, not be distributed identically (e.g., we might expect a large sibship to give birth to more children than a small one). Thus the macro-process is a multi-type branching process, and in the Galton–Watson case simply has sibship size as its type.