"Although we do not find meaningful increases in ideological extremity of recommendations, we show that a growing proportion of recommendations deeper in the recommendation trail come from extremist, conspiratorial, and otherwise problematic channels. This increase is most pronounced among the right-leaning users."
The judgement of "extremist, conspiratorial, and otherwise problematic" cannot possibly be impartial, making this study an act of political advocacy masquerading as scholarship.
"Although we do not find meaningful increases in ideological extremity of recommendations, we show that a growing proportion of recommendations deeper in the recommendation trail come from extremist, conspiratorial, and otherwise problematic channels. This increase is most pronounced among the right-leaning users."
The judgement of "extremist, conspiratorial, and otherwise problematic" cannot possibly be impartial, making this study an act of political advocacy masquerading as scholarship.