PurposeThis study seeks: (1) to identify whether the form of governance adopted (relational or contractual) drives suppliers' and buyers' collaboration in the same way; (2) to examine if both parties hold a similar view on the simultaneous use of both governance forms; and (3) to explore whether their perceptions on governance, collaboration and performance differ.Design/methodology/approachThe study used data from a survey of 150 matched buyer–supplier dyads from South Korea, using structural equation modeling (SEM) for the analysis.Findings(1) While governance mechanisms assist collaboration and affect operational and innovation outcomes, the significance and relative strength of the proposed relationships are perceived differently by buyers and suppliers. (2) Contrasting results are found regarding the interaction effect of the governance mechanisms on collaboration: a complementary relationship for the buyer and a substitutive relationship for the supplier.Originality/valueStudies on buyer–supplier relationships have yielded inconsistent results regarding whether the interactions of governance mechanisms function as substitutes or complements, because research has largely been conducted from the buyer's perspective, rather than the supplier's; this imbalanced view calls for integrated perspectives.

Cholecystectomy is the current standard recommended treatment for dogs with gallbladder mucoceles. However, medical management with monitoring has also been recommended for asymptomatic dogs. The purpose of this retrospective study was to compare ultrasonographic patterns of gallbladder mucoceles with clinical disease status in a group of dogs. For each included dog, the ultrasonographic pattern of the mucocele was classified into one of six types: type 1, immobile echogenic bile; type 2, incomplete stellate pattern; type 3, typical stellate pattern; type 4, kiwi like pattern and stellate combination; type 5, kiwi like pattern with residual central echogenic bile; and type 6, kiwi like pattern. A total of 43 dogs were included. Twenty-four dogs, including 11 dogs with gallbladder rupture, were symptomatic. Nineteen dogs were asymptomatic. Cholecystectomy (n = 19), medical therapy (n = 17), or monitoring (n = 6) treatments were applied according to clinical signs and owners' requests. One dog suspected of having gallbladder rupture was euthanized. Frequencies of gallbladder mucocele patterns were as follows: type 1 = 10 (23%), type 2 = 13 (30%), type 3 = 5 (12%), type 4 = 11 (26%), type 5 = 4 (9%), and type 6 = 0. In dogs with gallbladder rupture, type 2 (8/13) was the most common. No significant correlations were found between ultrasonographic patterns of gallbladder mucoceles and clinical disease status or gallbladder rupture. Findings indicated that ultrasonographic patterns of gallbladder mucoceles may not be valid bases for treatment recommendations in dogs.

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