Cohort effect
\ˈkoʊhɔrt\ \ɪˈfɛkt\
A component of a mortality trend that aims to capture the impact of the unique experiences of individuals born in the same time period, known as a birth cohort. It is one of three key dimensions used to understand historical mortality improvements, alongside age and period effects.
For example, people born in the UK during the 1930s and 1940s have shown unusually strong improvements in mortality, often attributed to reduced smoking rates and better public health interventions such as the establishment of the National Health Service.