To Err is Human, But Can It Be Forgiven?: Effects and Economics of Typos
http://www.stc.org/ConfProceed/1995/PDFs/Pg37.pdf

Grice, Roger A., Lenore S. Ridgway Richard K. Ridgway and Edward J. See
STC Proceedings
1995

Abstract:

Technical communicators dread typos. A piece of work that contains one or more typos is seen as shoddy, not something to be proud of. Finding and correcting these errors, however, takes time and costs money. Might there be a better way to spend resources?- ways that might produce more usable information.? Effects of errors, value added by correcting them, and the economics of error detection will be discussed.