"…In one experiment, Ms. Mason and her team had 130 sets of people negotiate the price of a used car. When buyers suggested a round anchor, they ended up paying an average of $2,963 more than their initial offer. But buyers who suggested a precise number for a first offer paid only $2,256 more, on average, than that number in the end.
When it comes to negotiating salary, Ms. Mason’s research indicates that a job candidate asking for $63,500 might receive a counteroffer of $62,000, while the request for $65,000 is more likely to yield a counteroffer of, say, $60,000, as the hiring manager assumes the candidate has thrown out a broad ballpark estimate."