This paper investigates the positional effects on citation and readership in arXiv, focusing on the "reverse-visibility" effect for positions near the ends of announcements and the "procrastination" effect associated with submissions made just before the daily deadline. The authors analyze data from two large subcommunities of theoretical high energy physics (hep-th and hep-ph) and find a clear "reverse-visibility" effect, where articles near the ends of lists receive enhanced short-term readership and long-term citations. Additionally, they observe an "oblivious" effect, where researchers who submit articles without aiming for specific positions tend to receive fewer citations. The study also examines geographic and time zone effects, concluding that these do not significantly influence the positional effects. The findings highlight the importance of understanding these positional biases in assessing the impact of research articles.This paper investigates the positional effects on citation and readership in arXiv, focusing on the "reverse-visibility" effect for positions near the ends of announcements and the "procrastination" effect associated with submissions made just before the daily deadline. The authors analyze data from two large subcommunities of theoretical high energy physics (hep-th and hep-ph) and find a clear "reverse-visibility" effect, where articles near the ends of lists receive enhanced short-term readership and long-term citations. Additionally, they observe an "oblivious" effect, where researchers who submit articles without aiming for specific positions tend to receive fewer citations. The study also examines geographic and time zone effects, concluding that these do not significantly influence the positional effects. The findings highlight the importance of understanding these positional biases in assessing the impact of research articles.