What defines the bargaining zone in a negotiation? How does a positive or negative bargaining zone affect the outcome of a negotiation?

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The Answer is The bargaining zone is the range between negotiators' reservation points.A positive bargaining zone means that mutual agreement is better than resorting to BATNAs.A negative bargaining zone indicates there is no positive overlap between the parties' reservation points and negotiators should not waste time negotiating but exercise their BATNA's instead.

What Defines the Bargaining Zone in a Negotiation? How Does