Трудно поколения сравнивать напрямую, так как люди с возрастом меняются, обычно в сторону большего консерватизма. Пару лет назад была опубликована попытка сравнить политические предпочтения разных поколений американцев, когда они были примерно в одном и том же возрасте. Я сейчас статью не могу найти, но вот её пересказ на CNN (https://www.cnn.com/2016/09/07/health/millennials-conservative-generations/index.html):
"...millennials are more likely to identify as conservative than either Generation Xers or Baby Boomers were at the same age, said Jean Twenge, professor of psychology at San Diego State University and lead author of the paper.
High school seniors are more likely to identify as political conservatives now compared to 10 years ago. Most surprising, more identify as conservatives now compared to the 1980s, presumably the era of the young conservative, such as the character Alex P. Keaton in the 1980s show 'Family Ties.' That goes against the common view of millennials as very liberal," said Twenge, author of the book about millennials titled "Generation Me."
"So the current view of millennials as liberals might be due to their age -- young people are more likely to be liberal. But if you compare young people now to young people in previous decades, those now are more conservative," she said.
...
The data showed that, as entering college students, 23% of millennials identified as leaning far right [sic!], compared to 17% of Baby Boomers and 22% of Generation Xers.
Less than half -- 47% -- of millennials identified as "middle-of-the-road," compared to 50% of Baby Boomers and more than half -- 53% -- of Generation Xers."
То есть расклад среди 17-18-летних получается такой:
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Date: 2018-04-16 02:20 pm (UTC)"...millennials are more likely to identify as conservative than either Generation Xers or Baby Boomers were at the same age, said Jean Twenge, professor of psychology at San Diego State University and lead author of the paper.
High school seniors are more likely to identify as political conservatives now compared to 10 years ago. Most surprising, more identify as conservatives now compared to the 1980s, presumably the era of the young conservative, such as the character Alex P. Keaton in the 1980s show 'Family Ties.' That goes against the common view of millennials as very liberal," said Twenge, author of the book about millennials titled "Generation Me."
"So the current view of millennials as liberals might be due to their age -- young people are more likely to be liberal. But if you compare young people now to young people in previous decades, those now are more conservative," she said.
...
The data showed that, as entering college students, 23% of millennials identified as leaning far right [sic!], compared to 17% of Baby Boomers and 22% of Generation Xers.
Less than half -- 47% -- of millennials identified as "middle-of-the-road," compared to 50% of Baby Boomers and more than half -- 53% -- of Generation Xers."
То есть расклад среди 17-18-летних получается такой:
Baby Boomers (1946-1964): 17% правых, 50% центристов, 33% левых
Generation X (1965-1979): 22% правых, 53% центристов, 25% левых
Millennials (1980-1996): 23% правых, 47% центристов, 30% левых
Нужно, конечно, смотреть первоисточник, не говоря уж о том, что "правые" и "левые" позиции со временем меняются, но всё же.
А вот разбивка по поколениям и годам за 1994-2014 годы -- http://news.gallup.com/poll/181325/baby-boomers-likely-identify-conservative.aspx (см. график.)