Here's one source for the over-estimation thing https://www.realclearscience.com/journal_club/2015/11/13/americans_overestimate_social_class_mobility_and_the_ef

Here's one source for the over-estimation thing https://www.realclearscience.com/journal_club/2015/11/13/americans_overestimate_social_class_mobility_and_the_effect_is_more_pronounced_among_conservatives_109450.html https://www.realclearscience.com/journal_club/2015/11/13/ame...