Thank you

Nature is reporting a study published in PNAS, which analysed data on who had thanked whom in a set of 335000 papers in computer science. Acknowledgement is a separate thing from citing someone, and is another indicator of who is important in a study. Text mining software makes this study possible.

See: PNAS 2004 101, 17599-17604; and Nature 16 December, p. 790.