multaneously. The dilemma implicitly also ad-
dresses the need to overcome horizontal competition
(among wholesalers) and vertical conflicts of inter-
est (among wholesalers and pharmacies).
With respect to our research questions we have
found theoretical explanations for the unique case
situation. The single most important part of our ex-
planation rests on the role, power and reputation of
the IPU. The IPU facilitated to initiate and moderate
collective action initially among the wholesalers and
subsequently with an increasing mandate and role
for themselves as party to the negotiations. By repre-
senting the overwhelming majority of the pharma-
cists they overcame the fragmentation of the market
and changed the power dynamics in the negotiations.
Moreover, they provided assurances with respect to
the adoption of the standards. The IPU established
themselves successfully as standards keeper. The
availability of widely accepted standards like EAN
product coding schemes clearly helped to build
credibility and to enhance the acceptance of the cho-
sen solution.
The wholesalers as initiators of ordering systems
agreed on common standards because they saw (or
were alerted to) the obvious interests of the pharma-
cies as potential adopters.
However, the constellations of actors, historical
and regulatory environment has been quite unique.
While we have found theoretical explanations for the
outcome ex post, similar developments are still far
from predictable. The notion of causality remains
contested: too many contingencies and considera-
tions are at play, which could have lead to another
outcome. Hence we have tried to establish plausible
reasons.
The specific actor constellation, in particular the
multiple roles which the IPU played successfully,
explain the achieved consensus. However, there
were a number of facilitating contingencies, which
have not determined the outcome but help to explain
it: The historical coincidence of standard develop-
ment in a technological “virgin market”, where the
business partners had not yet invested in their own
systems, convinced all parties – including the soft-
ware vendors – to pursue the chosen standards. The
area of consensus building (product code, order
message, communication protocol) facilitated the
consensus building. The standards guaranteed inter-
operability between the applications yet in a model
of loose coupling.
In the end, the strong role(s) of the IPU, in com-
bination with the economic benefits (and incentives)
of electronic ordering and the existence of one un-
contested standard, lead to wide adoption and a sus-
tainable solution.
ACKNOWLEDGEMENTS
The study described in this paper is part of a re-
search project (no. 1328/2-2) funded by a research
grant of the DFG (German National Science Foun-
dation) and is concerned with the question of how
institutional and national factors influence structures
and evolutionary paths of IOISs.
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