Generational replacement and Green party support in Western Europe

Over the past decades, electoral support for Green parties has gradually increased in Western Europe, especially among young people. This begs the question whether there are systematic differences between generations in support for Green parties, and whether there are also life-cycle effects. We answer this question by separating age, period and cohort effects on Green party support using CSES data covering 40 elections in 11 Western European countries. We find that when controlling for period and age, each new generation is more supportive of the Greens than the generation before. We also find negative age effects. While Green parties can expect to benefit in the future from generational replacement, the consequences of aging societies are to their disadvantage.