You Can't Put Old Wine in New Bottles: "arrival of newcomers decreases trust among group members and this decrease in trust negatively affects group performance" [full paper] User telnet_reddit_80, in the Reddit Science subreddit, 05 Mar 2013
You Can’t Put Old Wine in New Bottles: The Effect of Newcomers on Coordination in Groups User scientologist2, in the Reddit as it is meant to be subreddit, 05 Feb 2013