Competitive tendering is the means by which most goods and services are pro
duced by public bodies: therefore it is important to try to improve it. Tra
nsaction cost analysis, in particular the concepts of bounded rationality,
asset specificity and opportunism, provided the framework for examining two
competitively tendered contracts let by the Government Purchasing Agency t
in Northern Ireland. The firms tendering for the contracts were surveyed an
d interviews were carried out with Purchasing staff managing the tendering
process. The authors found that the main areas for further improvement in c
ompetitive tendering are the availability of information on previous contra
cts and debriefing, providing a clearer specification of user needs and of
quantities.