I'm a PhD student in engineering. My supervisor would like to pay me to edit a colleague's thesis for grammar and form. He asked me to look around for the going rate and let him know, but I'm not really sure of what figure to go by. Some thesis editing services are run by people with PhDs in literature and charge a lot, and others are run by upper year undergraduates and only ask for a small fee. What would be a reasonable rate to charge for such service in North America?
I don't have a better estimate than http://www.the-efa.org/res/rates.php whose rates work out to about 2 cents a word for basic copy editing or about 40 dollars an hour. For a thesis which is going to be very technical, I would expect someone with relevant expertise to get more. Grammar and form, probably is close to basic copy editing, but is probably more involved than that.