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The moderating role of trust in manufacturer‐supplier relationships

Sungmin Ryu (School of Business, Sungkyunkwan University, Seoul, South Korea)
Soonhong Min (The University of Oklahoma, Norman, Oklahoma, USA)
Nobuhide Zushi (University of Marketing and Distribution Sciences, Kobe, Japan)

Journal of Business & Industrial Marketing

ISSN: 0885-8624

Article publication date: 1 January 2008

3281

Abstract

Purpose

The purpose of this paper is to verify the moderating role of trust in the relationships between environmental uncertainty and a manufacturer's propensity for vertical control over its supplier, and between environmental uncertainty and the manufacturer's satisfaction with the supplier performance. It also confirms a threshold effect of trust, i.e. the moderating role of trust is present up until a threshold value of trust is reached.

Design/methodology/approach

Survey research was conducted to collect data from manufacturers; structural equation modeling was used to purify measurement scales, and multiple regression was conducted to test the hypotheses.

Findings

This study confirmed that a manufacturer's perception of a supplier's trustworthy behavior weakens the justification for a higher degree of vertical control over its supplier's key decisions. Trust also reduces the manufacturer's discontent with its supplier's performance.

Research limitations/implications

Traditional transaction cost analysis (TCA models) put too much emphasis on rationality and seldom consider the complexity of inter‐firm control in social contexts. This study demonstrates that considering trust in TCA supplements the explanations offered by TCA on buyer‐seller behaviors.

Practical implications

Manufacturers should determine the level of needed vertical control after assessing the level of inter‐firm trust to avoid unnecessary vertical control, which is as costly as, if not costlier than, supplier opportunism. Manufacturers should also realize the importance of formalizing continuous, two‐way information flow to further reduce supply market uncertainty, which cannot be done by trust beyond the threshold value.

Originality/value

This study considers both social embeddedness and TCA to enhance the explanatory power of the TCA framework. Additionally, this study shows that the moderating effect of trust is statistically significant at lower levels while the effect fades away at higher levels of trust.

Keywords

Citation

Ryu, S., Min, S. and Zushi, N. (2008), "The moderating role of trust in manufacturer‐supplier relationships", Journal of Business & Industrial Marketing, Vol. 23 No. 1, pp. 48-58. https://doi.org/10.1108/08858620810841489

Publisher

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Emerald Group Publishing Limited

Copyright © 2008, Emerald Group Publishing Limited

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