Editing Cohort study (section)

===Household panel survey===
Panel surveys are another important sub-type of [[longitudinal study]]. They differ from cohort studies by starting with representative cross-sectional samples, rather than cohorts defined by an event. Household panels draw representative samples of households and survey them, following all individuals through time on a usual annual basis. Examples include the US [[Panel Study of Income Dynamics]] (since 1968), the ''German'' [[Socio-Economic Panel]] (since 1984), the [[British Household Panel Survey]] (since 1991) and (since 2009) its successor [[Understanding Society: the UK Household Longitudinal Study]], the [[Household, Income and Labour Dynamics in Australia Survey]] (since 2001) and the European Community Household Panel (1994–2001).