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PurposeThe purpose of this paper is to investigate manufacturer encroachment and distributor encroachment in a three-echelon supply chain consisting of an upside manufacturer, an intermediate distributor and a downside retailer.Design/methodology/approachIn this paper, the authors use the optimization theory to mathematize the proposed question and build a model. First, the authors consider sequential quantity decisions, where the encroacher decides on the direct selling quantity after determining the retailer's order quantity. Second, the authors relax this sequential decision process assumption by reconsidering a circumstance in which quantity decisions are decided simultaneously.FindingsIn contrast to previous studies, this study shows that in three-echelon supply chains, the upside firm is more likely to encroach compared with the downside firm. The "bright side" of encroachment exists for all players only when the encroachment cost is at a moderate level. However, in manufacturer encroachment under simultaneous quantity decisions, the "bright side" skips the distributor but benefits the retailer directly as the encroachment cost increases from zero to a certain level. The main reason lies in that the distributor loses its pricing power because the end-market has been disturbed by the simultaneous quantity decisions. A comparison of the results of sequential and simultaneous quantity decisions reveals the merit of simultaneous quantity decisions. The authors find that the intermediate role (the distributor in our model) in three-echelon supply chains may benefit more from simultaneous quantity decisions. That is, the distributor may achieve a better profit even in a market with intensified competition.Originality/valueThe findings of this paper contribute to the marketing science literature on encroachment. The majority of existing literature has focused on manufacturer encroachment in two-echelon supply chains. This paper innovatively investigates and compares manufacturer encroachment and distributor encroachment in a three-echelon supply chain.

PurposeThis paper investigates the dual interactive effects of manufacturer encroachment on the supply chain and retailer provision of retail services.Design/methodology/approachConsider a supply chain dominated by manufacturers, retailers, and e-commerce platforms, with the manufacturers selling the same product online and offline. Utilizing Stackelberg's game theory, examples of wholesale and retail prices and profits of participants in the supply chain under different channels are analyzed. An effective encroachment strategy for manufacturers facing different retail service investment strategies of traditional retailers is given.FindingsWhen traditional retailers do not invest in retail services, they will lose more profit due to competition with the manufacturer. At this time, the retailer does not want the manufacturer to encroach. The traditional retailer's investment in retail services will enhance its and the manufacturer's profits, incentivizing the manufacturer to pursue an aggressive expansion strategy.Originality/value(1) Considers a situation where the selling efficiency of the manufacturer is lower than that of the traditional retailer. (2) The interaction between traditional retailers' retail service investment strategies and manufacturers' encroachment strategies is investigated where the manufacturer is the dominant player. The three modes of online direct sales, resale, and third-party platform agency are compared to provide a basis for decision-making on different types of manufacturers' encroachment. (3) Offline retail services not only directly increase sales in the offline market but also indirectly have a negative effect on the online market.

Purpose
– The purpose of this paper is twofold: to investigate performance of both manufacturer-owned channel and traditional retail channel when the manufacturer encroaches upon the traditional channel in different forms (brick-and-mortar and online form) under different market structures (Stackelberg and Bertrand). To examine the effect of acceptance of the online channel and travel cost on profits of two channels.


Design/methodology/approach
– The Hotelling model is employed to depict consumers
'
channel choice behavior, where the consumer surplus captures travel cost, spatial distance and consumer heterogeneity in acceptance of the online channel. A game-theoretical framework is developed to determine the optimal encroachment form and market structure for both manufacturer-owned and traditional retail channels.


Findings
– This paper finds that, in either form of encroachment, Stackelberg market structure always outperforms Bertrand market structure, and channel choice significantly relies on parameters, i.e. consumer acceptance of the online channel and travel cost. Moreover, a Pareto zone is proposed in which both channels consider the strategy that the manufacturer opens bricks-and-mortar channel under Stackelberg market structure as the optimal strategy.


Originality/value
– The present work fills a theoretical and practical gap for a structured analysis of the channel performance when the manufacturer encroaches upon the incumbent retail channel in different forms and under different market structure.