Before revision:  These models evaluate YouTube's impact on sharing of videos from a curated set of alternative political channelsand popular videos shared in three conspiracy-oriented Reddit subreddits; we compare these models to a placebo dataset of makeup-oriented videos that should be unaffected by YouTube's announcement. Results suggest YouTube's de-recommending AIN-produced content has a significant suppressive effect on sharing of AIN videos in both Twitter and Reddit , with our models showing a significant and downward trend in sharing.
After revision:  These models evaluate YouTube's impact on sharing of videos from mainstream news channels. Results show conspiracy-labeled and AIN videos that have evidence of YouTube's de-recommending AIN-produced content has a significant suppressive effect on sharing of AIN videos in both Twitter and Reddit , with our models showing a significant and downward trend in sharing.