The study itself sites many other studies.....and then reports the findings of its own study
https://ifstudies.org/ifs-admin/resources/briefs/ifs-gallup-parentingteenmentalhealthnov2023.pdf
As it happens, being raised by liberal parents is a much larger risk factor for mental health problems in adolescence than being raised in a low-income household with parents who did not attend college. Children of conservative parents score significantly better on mental health using either a comprehensive measure of mental health based on several items, or just asking either parent or adolescents to summarize their mental health on a 1-5 scale. The gap is large.
https://ifstudies.org/ifs-admin/resources/briefs/ifs-gallup-parentingteenmentalhealthnov2023.pdf
As it happens, being raised by liberal parents is a much larger risk factor for mental health problems in adolescence than being raised in a low-income household with parents who did not attend college. Children of conservative parents score significantly better on mental health using either a comprehensive measure of mental health based on several items, or just asking either parent or adolescents to summarize their mental health on a 1-5 scale. The gap is large.