Many people believe the act of starting a negotiation will result in losing the job offer.  Salary.com actually has some data of job offers rescinded because of salary negotiation.  The problem is the data is based on people trying to negotiate during the interviewing process.  If you have followed Equal Pay Negotiations you know that negotiating before you get the job is troublesome at best.  This Salary.com data backs that up.  In this video find out more about the data and how you can eliminate the concern