What is the difference between headship and membership rates?
Both membership and headship rates can be calculated from historical population data and applied to population projection data to produce household projections. Headship rates are based on the probability that a person of a particular age and gender will be the head of a particular type of household. Membership rates are based on the probability that a person of a particular age and gender will be a member of a particular type of household. So for each combination of age and gender (e.g. males aged 0-4, females aged 19-24, etc.) rates can be calculated and projected forward for each household type, even if they are zero in some cases. For both the headship and membership methods the projected rates can be applied to the projected private household population to produce the household projection.
