Having one party know critical information about the other party in a negotiation, but not vice versa, gives the knowing party a big advantage. I think stating

Having one party know critical information about the other party in a negotiation, but not vice versa, gives the knowing party a big advantage. I think stating your current salary gives the other negotiator a pretty good idea of how low of a salary you'd take, which you don't want to put out there right away.