There are times when something is being negotiated that we choose to not  go it alone. Instead, we decide that we need some help. 

When this  happens we may bring in an agent to represent us to the other side .  However, this can cause problems. If you do this, you wonder whether  you can trust the agent to fully represent your best interests no matter  what negotiation styles or negotiating techniques are being used. 

The  bad news is that according to principal agent theory, the answer often is “no.”