Party Identification by Age

Interesting graph on political party identification by age:

This was posted in response to an article about differing fertility rates for Republicans and Democrats (e.g. see here). More details from the Statistical Modeling, Causal Inference, and Social Science blog here and here (original Pew Center report). The Statistical Modeling blog says:

Peak Republican age is about 46--that's a 1960 birthday, meaning that your first chances to vote were the very Republican years of 1978 and 1980, when everybody hated Jimmy Carter.