Value Co-Creation and Satisfaction in B2B Context: A Triadic Study in the Furniture Industry

Research on Value co-Creation (VcC) has been more extensive in B2C (business-to-consumer) than in B2B (business-to-business) and mainly for service contexts, under dyadic approaches (supplier–client). Moreover, research has paid little attention to the impacts of VcC on Satisfaction in its duality: Social and Economic Satisfaction. As a novelty, this study examines VcC in B2B industrial relationships in the triad of supplier–manufacturer–client. A model proposes VcC as an antecedent of manufacturer’s Economic Satisfaction, with the mediating role of Social Satisfaction. The model is empirically contrasted for a sample of 77 firms from an industrial panel—the Spanish Furniture Market Observatory. The triadic approach is depicted with bi-directional relationships of the manufacturer with its main supplier and main client). Results evidence that VcC and Economic Satisfaction are greater in the manufacturer–main client relationship. Moreover, the manufacturer’s Satisfaction relies on its social dimension, which has a key role to produce Economic Satisfaction. Results also show asymmetry in the supply chain, different from those with the main supplier. Implications for managers invite to achieve a long-term VcC chain with all business partners, the focus being on manufacturer’s social dimension, so the triad supplier–manufacturer–client could be


Introduction
Value co-Creation (VcC) is currently a major line of research in the marketing literature. The practices of VcC in B2B (business-to-business) relationships, whether industrial or between service companies, are of growing strategic interest for the development of competitive advantages. As widely acknowledged, VcC has a leading role in the Service-Dominant Logic (SDL) approach [1]. In the SDL mindset, B2B relationships are understood under a new perspective, wherein a service is considered the core of all exchanges. Under this paradigm, value derives from a co-creation between actors in the application of resources in the business relationship [1]. Under the SDL lens, numerous studies have identified strategic business priorities related to the VcC, especially in recent years [2]. Among these priorities, what clearly stands out is the need to develop complex and dynamic co-creation networks through service ecosystems with clients and partners [3,4]. A new priority arises: the creation of Product/Service Systems, in an interaction between tangible and intangible elements in the company, known as "servitization" [5,6], all in a competitive context of globalization and digitalization. In this sense, addressing VcC, both scholarly and managerially, can contribute to more holistic ecosystems in companies and corporations [7,8].
However, although the VcC is mainstream within the framework of SDL and it has been the subject of numerous calls for research in recent years (e.g. [2,9,10]), its empirical analysis is difficult and controversial [11,12]. As a result, most research on VcC has focused on business-to-consumer (B2C) relations, while less progress has been made in the area of business-to-business (B2B) relations. Indeed, our review of previous studies coincides with that of others [3,13,14] in showing that the B2B field has mainly developed in the context of services (tourism, ICT, health, financial services, etc.), while the industrial manufacturing context has received less attention. More specifically, the study on how VcC varies according to the company's role in the supply chain is limited, either through the dyad approach or the triad approach. The dyad approach deals with the unidirectional relationships of an agent with others, either upwards (from the client to the supplier) or downwards (from the supplier to the client). Otherwise, the triad approach studies the former and the latter relationships [15,16]. In this sense, from a triadic approach, studying VcC interactions between firms in a supply chain (i.e. B2B relationships) should add to the long-term development of companies' ecosystems. Indeed, at an uppermost macro-level, it is clearly acknowledged how socio-economic aspects of human interactions are relevant for sustainable development progress [7]. However, at a micro-level, especially when considering B2B approaches, these socio-economic aspects are less researched.
In sum, several reasons exist for focusing on the impacts of VcC on B2B relationships: (1) there is a need for expanding the B2C findings into the B2B context, specifically in order to complete a holistic view of co-creation from end-users back through the whole supply chain; (2) theory on Satisfaction dimensions needs to be contrasted in different business settings; (3) theoretical models need more clarification on the role of VcC regarding relational and result variables.
Accordingly, this paper aims to study the concept of VcC and its effect on Satisfaction in the industrial B2B relationship. We focus on industrial manufacturers with a proposed model of mediation of Social Satisfaction in the VcC-Economic Satisfaction chain. The model is empirically contrasted for a sample of 77 firms from an industrial panel-the Spanish Furniture Market Observatory. A triadic approach is adopted with bi-directional relationships of the manufacturer with its main supplier and main client, in order to establish differences along the supply chain.
By using this approach, we wish to enhance knowledge on several aspects scarcely developed in the literature. Firstly, the work considers the manufacturer's VcC in the double direction supplier-manufacturer and manufacturer-client, introducing a novel triad approach. This approach helps to understand the critical role of the industrial manufacturer as an intermediary along the supply chain [16]. In this way, the work enhances the understanding of how the perception of the industrial manufacturer differs according to its role in the supply chain towards the supplier or the main client. Secondly, our study adopts and enriches the research stream that addresses differences in the not-always-clear link between Economic Satisfaction and Social Satisfaction in the industrial B2B relationship [17][18][19]. In this sense, the study contributes to explain the effect that Social Satisfaction has on Economic Satisfaction. Finally, the study expands the existing knowledge on Satisfaction in B2B relations by relating it to VcC, as a contemporary concept on which contributions are lacking regarding its influence on outcome variables such as business Satisfaction.
The paper is organized as follows: after an initial literature review that leads to research questions and model hypotheses, the empirical study conducted with a sample of 77 manufacturing firms is explained. Therefore, results are depicted so key findings, implications, and research limitations are discussed in the final section.

Value Co-Creation in the Industrial B2B Context
VcC in B2B environments is a concept derived from consumer behavior and strategic marketing literature, resulting in abundant research on perceived value in B2C contexts [20][21][22], in its measurement and modeling. Value is usually considered as a mediating variable in means-end models between antecedent variables (price and quality, mainly) and consequent variables or results (loyalty and behavioral intentions, mainly). At the same time, the literature on strategic marketing adds basic variables such as trust and commitment in addition to Satisfaction, to understand B2B relationships in industrial contexts.
Conceptually, there is no agreed definition of VcC. Different research streams introduce co-creation as a consumer involvement matter, a service issue, or an innovation process, which broadens the role of interactions and stakeholders under different but related activities (e.g. co-production and prosumption) [2,9,10]. However, both in the consumer literature and in the strategic marketing literature, there is unanimity on the customer centrality in creating value. In both traditions, value is phenomenological, cocreated, and multidimensional [23,24], which implies that value does not reside in the products or services offered, but in the experience itself.
Other authors point out the dynamic nature of VcC, underlining the existence of stages, processes, and episodes throughout the business relationship [10]. The dynamic nature of value is also reflected in the interest aroused by the interactions of the concept with the capabilities and resources of the company [4].
Another prominent aspect in the literature on VcC in the context of SDL is its collaborative, interactive, and reciprocal characteristics, clearly synergistic in nature [14]. VcC implies collaboration with a network or ecosystem of agents in the company's environment, both suppliers and customers where the end customer occupies a central axis [3,24].
More specifically, when it comes to VcC in the B2B relationship, there is a wide variety of approaches to the concept. In light of the review carried out, there is consensus in considering information exchanges and collaboration as essential VcC practices between companies. Kohtamäki and Partanen [15], for example, employ a relational learning scale in regard to the transmission of information between the manufacturer and the customer in the context of knowledge-intensive industrial services. On the other hand, a collaboration between B2B agents is often reflected in the existence of common planning practices, joint problem solving, and flexibility in unforeseen situations or situations that require adaptation [25]. Other authors have approached the question by studying the level of business readiness for the strategic VcC, as is the case of the DART scale proposed by Albinsson et al. [26], which measures dimensions of co-Creation such as dialogue, access, risk assessment, and transparency between partners. Furthermore, in their study, these authors incorporate shared responsibility between partners as a variable in their model, in contrast with other authors including it as an attribute of VcC (for example, in Claro and Claro [25]).
By way of synthesis of this review, Table 1 summarises the most recent approaches adopted in the VcC literature.

Satisfaction in the Industrial B2B Relationship
Satisfaction with a B2B relationship is understood as "an affective state resulting from the appraisal of different aspects of the relationship" [35] (p. 63). Satisfaction is a global evaluation and an indicator of the effectiveness of the relationship between partners, as well as a predictor of continuity [19,36].
To provide long-term relationships in the supply chain, Satisfaction should be presented in two ways: Economic, on the one hand, and Social or non-Economic, on the other [37]. Economic Satisfaction is the positive evaluation that a company makes of the economic results or benefits obtained due to their relationship with another company (volume of purchases, margins, discounts, etc.). Social Satisfaction is defined as the gratifying evaluation that the company makes of interactions with the other party and focuses on the psychosocial aspects of the relationship (ease of doing business, communication, shared values, etc.). Geyskens and Steenkamp [37] conceptually differentiate between both components of Satisfaction in B2B relationships, since each dimension arises from different practices and presents different implications for the relationship.
Satisfaction is usually presented as a consequence of the business relationship. However, this causality is not always clear, and it has been also considered as part of the relationship quality construct alongside other variables such as trust [18,19,38]. Similarly, the direction of the chain of effects between the two types of Satisfaction is not always obvious. In general, Ha et al. [18] show the importance of Social Satisfaction in the B2B relationship over time, in comparison with Economic Satisfaction and its position between perceived value and trust. In the industrial B2B context, Ferro et al. [17] study the causal relationships between Economic Satisfaction and Non-Economic Satisfaction, although they do not obtain evidence of the direction of the effect of one on the other. As a summary, Table 2 describes the main bibliographic references on B2B relations supporting this study.

Research Questions, Hypotheses, and Model of Mediation Between VcC and Satisfaction
For the methodological design, we look to previous studies that have explored the dyad or triad approach in the study of VcC in the industrial B2B relationship (e.g. [15,16]). We also review other works on Satisfaction in the B2B relationship, establishing the difference between Economic Satisfaction and Social Satisfaction [17][18][19]. Integrating these previous contributions, we first propose the existence of differences in the assessment that the manufacturer makes of VcC and the Social and Economic Satisfaction between its main supplier and its main customer. To do this, the following research questions are raised: Q1. Is VcC in the manufacturer's relationship with its main supplier different than with its main customer?
Q2. Is Social Satisfaction in the manufacturer's relationship with its main supplier different than with its main customer?
Q3. Is Economic Satisfaction in the manufacturer's relationship with its main supplier different than with its main customer?
Second, there is an important line of research that proposes causal models where VcC is presented under different roles in its relationship with other concepts. Some authors relate VcC with the company's operating resources and results (e.g. Hamidi and Gharneh [27]). Zhang et al. [14] add the innovation capability, the marketing and networking capabilities of the company to model the relationship between these capabilities and the VcC and, as variables resulting from their model, the brand capital, and the customer value. O'Cass and Ngo [4] show the relationship between VcC and market orientation, product innovation capability, and marketing capabilities with all results (business performance value and relational value) validated through control variables (company size and type of market). Ngo and O'Cass [41] study the importance of operating resources (production, innovation, and marketing capability) on VcC, understood as a dimension of the company's value proposition. Hsu [28], on the other hand, models the VcC strategy with the marketing, the innovation and the design strategies, and the new product development as a result variable in its model.
Along these lines, the theory presents numerous models where VcC interacts with other B2B relational variables such as trust or commitment between partners. These variables have been considered precursors of customer value or of the business relationship [32], but causality is not always evident. In fact, the literature presents examples where VcC plays different roles in the B2B relationship. For example, as an antecedent (e.g. Cossío-Silva et al. [34], Franklin and Marshall [29], Thiruvattal [33]) or as a consequence (e.g. Merz et al. [31], O'Cass and Ngo [4]). Although scarce, in the B2B field, VcC can act as an antecedent for other relational variables, such as customer satisfaction and loyalty [30]. Last, there are also mediating variables such as superior service solutions or collaboration in the supply chain [33].
Based on these previous works, to explore the aforementioned questions, we propose a regression model with mediation, applied to the relationship between the manufacturer and its supplier or its main customer, where the effect of VcC on Economic Satisfaction is mediated by Social Satisfaction. Figure 1 shows the proposed model, with the corresponding hypotheses, raised for both directions of the triad (A and B).
H1. The manufacturer's VcC has a direct and positive effect on Social Satisfaction, in the relationship with its main supplier (H1A) and/or with its main customer (H1B).
H2. The manufacturer's VcC has a positive effect on Economic Satisfaction, in the relationship with its main supplier (H2A) and/or with its main customer (H2B).
H3. The Social Satisfaction of the manufacturer acts as a mediator of the effect of VcC on Economic Satisfaction, in the relationship with its main supplier (H3A) and/or with its main customer (H3B).

Data Collection and Sample
To address the objective of this work, a quantitative investigation has been designed with a structured questionnaire. Senior managers (CEO, marketing or sales directors, etc.) or middle managers (responsible for purchasing, administration, etc.) of manufacturing companies evaluated the VcC in a double direction following the triad approach: with their main supplier (Sample A) and with their main customer (Sample B), in accordance with the volume of purchases or sales for the reporting company.
The scope of this work is the furniture industry, a sector which lacks of studies in this field [39]. Spain's furniture industry is characterised by the high fragmentation of SME producers (6,962 manufacturing companies turned over 4,608 million Euros in 2019) and the concentration of sales (1% of manufacturers accounted for 42% of operating income in 2017) [42]. Furniture manufacturers' relationships are developed both with their suppliers of materials (boards, fittings, varnishes, etc.), as well as with shops and retailers (specialised in furniture and non-specialised, such as larger DIY and construction stores, department stores and hypermarkets).
Data was collected on a national level in October 2017, from a sample of panellist companies participating in the Spanish Furniture Market Observatory, led by AIDIMME (Technological Institute). This is an industrial panel that has measured the sector's activity on a quarterly basis since 1998. The Observatory is made up of companies in the supply chain, with the participation of suppliers of materials, furniture manufacturers (contemporary, classic, office, kitchen, and bathroom, etc.) and retailers. For this research, the collaboration of the companies was requested in an ad-hoc specific wave. The initial census was 240 panellist companies, from which 77 valid questionnaires were collected (response rate of 32.1%). The manufacturer (a single informant) evaluated, in order to study the triad, VcC and Satisfaction with its main supplier (sample A) and with its main customer (sample B). Questionnaires were administered by professional pollsters on the phone within an overall month timeframe for responses. Data analysis was performed using the statistical software packages SPSS and SmartPLS [43]. Table 3 summarises the main characteristics of the reporting companies for the study.

Statistical Power of the Sample
Before examining the existence of significant differences in the responses of the samples, we performed a power test to confirm the suitability of the samples [44]. The test power has been estimated with the G*Power software application version 3.1.9.2. The two data samples A and B have a power of (1 − β) = 0.86 (86%), for n = 77. In both cases, an α = 0.05 and a strong effect size (0.3) were applied to check the test power. The result of this test confirms that the two samples exceed 80% of the statistical power required in social sciences, according to the literature [45].

Measurement Development
To measure the VcC construct, we chose the approach of collaboration between companies adopting Claro and Claro [25]'s scale, from their research on collaboration in the supplier-customer relationship and information on distribution channels. The measurement scale reflects this collaborative framework, where solutions are sought constructively by both parties in the B2B relationship, rather than in a coercive or dominant way by one part. The scale is made up of six indicators, which respond to the main aspects of collaboration between companies, namely: new product development, long-term planning, problem-solving, shared responsibility, flexibility, and response to unexpected situations. These indicators are reflected in the measurement scale, which has been treated in a unidimensional way.
On the one hand, for the Economic and Social Satisfaction variables, we adapted scales proposed by Chung et al. [46], with three indicators each, using seven-point Likert scales. Indicators for Economic Satisfaction reflect the improvement in the market position, sales, and effectiveness achieved due to the relationship with the business partner. On the other hand, indicators for Social Satisfaction reflect mutual respect, the overall working relationship, and willingness to choose the same business partner again.

Principal Components Analyses for VcC and Satisfaction
Before examining the significant differences in the responses of the two samples (A and B), we carried out an Exploratory Factor Analysis to find out the dimensionality of the variables VcC and Satisfaction in a dual Social and Economic approach. Through a Principal Component Analysis (PCA) we verify that VcC is presented in a unidimensional way and explains 54.28% of the total variance in the case of sample A (relationship between the manufacturer and the main supplier), and 62.53% in sample B (relationship between the manufacturer and the main customer). As it is a unidimensional variable, the rotation of the factors has not been necessary.
In the same way, we carried out the Exploratory Factor Analysis on Social Satisfaction and verified that its only dimension explains 72.47% of the total variance in sample A and 80.44% in sample B. Economic Satisfaction, also unidimensional, explains 74.46% of the total variance in sample A and 71.00% in sample B.

Reliability and Validity of the Measurement Scales
Next, we present the corresponding reliability and validity contrasts of the measurement scales for the variables VcC, Social Satisfaction, and Economic Satisfaction (cf. Tables 4 and 5). In light of the results, no items were removed from the initial scales. Reliability makes it possible to know the stability or consistency of the scales used, so the higher the reliability, the lower the variability of the results offered by the measuring instrument. In this study, the three scales used have Cronbach's alpha values close to or greater than 0.8 and indicators of composite reliability greater than 0.9, which are acceptable for the two study samples.
On the other hand, since the one-dimensionality of the scales used is an indicator of convergent validity, this is further demonstrated, as the mean extracted variance exceeds the minimum value of 0.5 in the scales in both study samples.
The validity tests allow us to verify that the scales accurately measure the concepts of VcC, Social Satisfaction, and Economic Satisfaction, with no overlapping with other con-cepts. Content validity, that is, the scale represents the concept it measures, is guaranteed by the theoretical foundation underlying the scales used and its prior validation in the original studies [25,46]. Discriminant validity verifies that the scales do not measure concepts other than those for which they were created. We carry out this verification with two complementary methods: first, the square root of the mean-variance extracted from each variable is higher than its correlation with the other variables in the study (Fornell-Larcker criterion); secondly, the correlations of the items of one variable are higher than the correlations of items measuring other variables, known as the Heterotrait-Monotrait ratio, which must be less than one [47].
Finally, the internal consistency, the factor analysis carried out, and the theoretical foundation of each variable allow us to check the validity of the concept (each scale measures a specific variable). In addition, the revised theory supports the existence of a nomological network between VcC and Satisfaction in the field of B2B relationships, which in turn confirms the nomological validity of the proposed variables.

Mean Comparison of VcC and Satisfaction of the Manufacturer with its Main Supplier and with its Main Customer
After analyzing the psychometric properties of the scales and rejecting the normality hypothesis, it is considered appropriate to apply the nonparametric Mann-Whitney U test. The rationale for this is to analyze whether or not there are significant differences between VcC and Satisfaction upwards (with the main supplier) and downwards (with the main customer) in the supply chain.
Through this analysis, we compare the means obtained in the items described in the samples. The purpose of using this technique is to contrast independent samples, where the variable to be compared does not follow a normal distribution. The results derived from the comparison of means of the VcC variable between the manufacturer's relationship with its main supplier and with its main customer are presented below. Table 6 presents the descriptive statistics and U Test for VcC and Economic and Social Satisfaction, comparing samples A and B.
The nonparametric Mann-Whitney U test indicates that the difference between the The nonparametric Mann-Whitney U test indicates that the difference between the manufacturers' responses in relation to VcC with their main supplier and with their main customer does not present significant differences in four items (VcC1, VcC2, VcC3, and VcC6). However, through the U Test, we can affirm that the responses of the two samples are significantly different in relation to the shared responsibility to achieve the objectives (VcC4) and in terms of flexibility in the face of changes in the relationship (VcC5). In both items, the values are higher in sample B, indicating a greater shared responsibility and greater flexibility of the manufacturer with its main customer, compared to that experienced with its main supplier. This allows us to partially answer research question Q1 since samples A and B differ in two of the six VcC items.
In addition, the U Test confirms that there are no significant differences in any of the items of the manufacturer's Social Satisfaction with its main supplier and main customer. These results do not allow an affirmative answer to the research question Q2. Regarding Economic Satisfaction, results show the absence of significant differences for items SATE2 and SATE3, but not for SATE1, which reflects a greater relevance in the manufacturer's market position, derived from working with its main client. These results allow us to partially validate the research question Q3.

Regression Model with the Mediation of Social Satisfaction between VcC and Economic Satisfaction
We checked the regression model with mediation through a series of regression equations with the factorial scores of each of the model variables. In this way, we have verified the following necessary conditions to contrast the mediation of one concept between two others, following the four-step analysis method [48][49][50][51]: If all four conditions are met, then we can accept the existence of mediation. For this, we have compared the proposed equations for both samples (cf. Tables 7-9).   We observe that VcC has a positive and direct effect on Social Satisfaction in both samples, which allows us to validate hypotheses H1A and H1B. Similarly, VcC has a positive effect on Economic Satisfaction in the two samples, which allows us to validate hypotheses H2A and H2B.
The VcC coefficient is lower when Social Satisfaction mediates in the regression equation on Economic Satisfaction (third equation) than when VcC acts in isolation (second equation). The condition is met in both samples: in sample A, the effect of VcC mediated by Social Satisfaction on Economic Satisfaction is lower (VcC beta = 0.602) than when the effect is direct (VcC beta = 0.741); while in sample B the effect of VcC mediated by Social Satisfaction is lower (VcC beta = 0.522) than when it is direct on Economic Satisfaction (VcC beta = 0.676). The coefficient of Social Satisfaction is less significant in the third equation for sample B (significant at the 0.05 level) than it is for sample A (significant at the 0.01 level).
In addition, we carried out complementary methods to Baron and Kenny's four-step analysis [48], to establish the significance of the indirect effect of the mediation [50,52]. With this method, if the variance of the predictor variable over the dependent due to the indirect effect exceeds 80%, the mediation is perfect, while it is partial between 20% and 80%, in both cases significant. Otherwise, the existence of mediation below 20% cannot be accepted. In our case, we estimate the variance due to mediation with the bootstrap method and calculate the standard errors of the estimates in both samples: results confirm the partial mediation of Social Satisfaction in the case of the relationship between the manufacturer and its main customer (variance due to mediation = 22.3%). This implies that just over a fifth of the effect of VcC on Economic Satisfaction is due to the mediation of Social Satisfaction. On the contrary, the results do not allow confirmation of partial mediation in the case of the relationship between the manufacturer and its main supplier (variance due to mediation = 18.5%). These results do not permit validation of hypothesis H3A, but they do validate hypothesis H3B, as shown in Table 10. In sum, our results throw evidence on the different nature of Social and Economic Satisfaction in B2B industrial relations. Regarding the triad supplier-manufacturer-client, our results show that VcC and Economic Satisfaction are greater in the manufacturer-main client relationship. Moreover, we have contrasted a model where Social Satisfaction plays a mediating role between VcC and Economic Satisfaction. A partial mediation in the manufacturer-client relationship has been proven, while mediation is not evidenced in the supplier-manufacturer relation. These findings suggest both theoretical and practical implications that are discussed in the following section.

Key Findings
This work allows advances in VcC research by studying the effect of VcC on manufacturer's Social and Economic Satisfaction in B2B relationships throughout the industrial supply chain. We have been able to address results in the industrial context that are less common in the VcC literature, which has devoted the most attention to the relationship between the company and consumer (B2C) (e.g. [53,54]) or, in second place, between companies (B2B) in the scope of services.
Key findings of this work point out VcC as an antecedent of Economic Satisfaction, with the mediation of Social Satisfaction, in manufacturer-client relationships. These findings reinforce previous theories on the differences between social and economic dimensions of Satisfaction. Our findings also evidence differences in B2B relations between partners in the supplier-manufacturer-client triad along the supply chain.

Theoretical Contribution and Novelty
The theoretical contribution of the article is the effect of VcC in the chain formed by Social Satisfaction and Economic Satisfaction. Thus, we incorporate a conceptual difference between the Satisfaction variables as indicated by recent studies in the B2B context [17,18]. It should be noted that, although VcC has received different conceptual treatments in the academic literature, this work opts to measure the concept through a collaboration-like approach between companies applicable to the industrial supply chain. The results confirm the direction of the effect of Social Satisfaction on Economic Satisfaction and the role of the former as a mediating variable between VcC and the latter in the relationship between the manufacturer and its main customer. However, this does not occur in the relationship with the main supplier. Nevertheless, the mediation of Social Satisfaction, even when it exists, is partial, so it is to be assumed that additional variables would contribute to a better understanding of the effect of VcC and Economic Satisfaction in the B2B context in both directions of the supply chain.
In addition, we contribute to the theory with the triad approach used to study how the manufacturer's perception varies according to its role in the supply chain. This is one of the few comparative studies within the industrial triad, where VcC and Satisfaction have been measured in two directions: between the manufacturer and its main supplier (upwards), and between the manufacturer and its main customer (downwards). Moreover, our research adds to general models on sustainable development (e.g. Diesendorf [7]) which consider the need to develop personal and organizational skills and to strengthen the sense of community, which in "the case of a corporation, the 'community' may consist of all employees or even all stakeholders" [7] (p. 10). Our research has evidenced the relevance of social ties in "communities", by studying a triad, and highlighting the importance of adopting a broader picture of the main stakeholders (here, suppliers, manufacturers, and clients) to gain corporate development.

Managerial Implications
These results present implications for business management in the industrial context. By comparing the perceptions of a single informant in upward relationships (with the supplier) and downward relationships (with the customer), a more refined and granular analysis of the industrial chain is allowed. Our results reveal asymmetries in the relationship of the manufacturer with the different agents that compose it. There is a greater propensity for VcC between companies in the links closest to final demand. However, upward networks can be woven at various levels (with the manufacturer's suppliers) that later impact end customers. In this sense, to align the VcC of all the agents of the triad, the joint study of the motivations for buying and using the products can be promoted. In the same sense, agents of the triad should promote the participation of the end-user for the development of new products in a digitized and relational shopping environment.
Moreover, there are no significant differences in terms of the manufacturer's Social Satisfaction in both directions of the supply chain. This has a double reading from a managerial perspective: (1) in search of a more efficient supply chain, a better economic result derived from the relationship with the main customer is not always linked to socially differential satisfaction from the manufacturer's perspective; (2) the relationship with the main supplier reaches the same levels of Social Satisfaction as with the main customer, although economically the manufacturer does not perceive the same advantages. Suggestions for increasing the link of the social bond to economic results in the triad would be promoting activities with partners (workshops, discussion groups, etc.) in order to work on joint business development proposals.

Limitations and Future Research Lines
However, despite all of the above contributions and implications, this work presents limitations (all summarised in Table 11). The triad approach is based on the opinion of a single informant (manufacturer) without knowing that of the other agents in the chain (main supplier and main customer). In addition, the results obtained should be considered as an initial step in the investigation of VcC in industrial B2B relations, in this case exclusively for the furniture sector. The research should be compared with samples from other industries. In this way, the contextual nature of VcC could be verified, whose practices depend on the business environment where they are applied. On the other hand, the concept of VcC used could be expanded beyond the collaborative approach and the exchange of information between companies. Last but not least, our results, obtained before the recent COVID-19 pandemic, should be cautiously interpreted and eventually measured again, as VcC in interfirm relationships may have dramatically changed, especially when considering both social and economic aspects together, as done in this study. Indeed, as recently stated [40], the economic shock brought on by the COVID-19 pandemic challenges any presumed advantages of B2B customer solutions and reveals the downsides of these complex offerings.
Finally, this work makes it possible to outline future lines of research. A dynamic approach could be introduced to know how VcC evolves throughout the B2B relationship in the supply chain, using longitudinal studies with companies. Another line would be the study of means-end models of VcC and Satisfaction variables with other constructs relevant for the B2B relationship, such as the company's technology bias, the quality of the relationship, or the impact on the results of the industrial relationship. Finally, the research could focus on the existence of synergistic networks or value creation ecosystems between companies, going beyond the traditional linear approach to the supply chain. This research approach would allow us to study all the B2B interactions between the actors in the triad and other actors (subcontractors, service companies, etc.) and the role played by the focal company in promoting VcC within the supply chain. which runs the Spanish Furniture Market Observatory and the Wood-Furniture CV AEI and has kindly collaborated in the empiric study. This Observatory is funded by the Valencian Government through IVACE (The Valencian Institute of Business Competitiveness).

Conflicts of Interest:
The authors declare no conflict of interest.