After the startup (census)
core baseline round where all households and members of the DSS are
registered, all subsequent rounds are concerned with updating events in this population. In the
HRS system, the Household Registration or Record Book (HRB) is the key document. Depending
on what events are occurring during the update period, additional forms are used to capture the
details on these core events. Some events need to be captured on a continuous basis such as
pregnancies, births and deaths and these core events need to be recorded during every update
round of the DSS. These are outlined in sub-sections of this section.