Foreword Long-term buyer-seller relationships are a real and important
phenomenon in business-to- business markets. Since the consequences for
the parties to a relationship heavily depend on the management of these
relationships, research becomes increasingly intensive to explain the
real phenomenon of buyer-seller relationships. On the one hand, the
objective is to determine when relationships are a reasonable form of
coordination in markets. On the other hand, the management of the
relationship itself is in the focus of the analysis. Transaction Cost
Economics (TCE) has been proven a fruitful theoretical approach
explaining both research objectives. TCE provides not only insights in
which situations relationships are economically reasonable but also
which activities are appropriate to protect ex post benefits on both
sides of the relationship from an ex ante perspective. In relation to
the second research objective of the buyer-seller relationship manage-
ment, safeguarding mechanisms - protection against opportunistic
behavior - were in the center of the analysis in the
business-to-business relationship literature. In contrast, the
flexibility to react to changing environmental conditions was largely
neglected in buyer- seller relationship management. The reason for this
one-eyed perspective can be traced back to the comparative static
approach as proposed by TCE comparing the efficiency of different
coordination forms at one point of time. Intuitively it becomes clear
that con- tractual safeguards to limit behavioral uncertainty do not
only provide advantages but also reduce the repertoire of the parties to
react to future, unexpected developments.