While there isn't a formal academic "paper" on this specific site's harem collection, there is significant cultural analysis and "interesting papers" regarding the in Japanese media (manga/anime) that you might find valuable: Interesting Research & Academic Perspectives
: Research papers such as those found on Project MUSE or JSTOR often explore how harem narratives reflect changing gender roles in Japan, specifically the "herbivore men" ( sōshoku-keidanshi ) phenomenon.
: Noted for its self-aware parody of harem tropes.
: Scholars often analyze the "Harem" genre through the lens of game theory or "Galge" (girl games) mechanics, where the protagonist serves as a blank canvas for the reader to project themselves onto.
: Highly regarded for its mystery-romance structure regarding which girl the protagonist eventually marries.