DEMATEL Technique to Assess Social Capital Dimensions on Consumer Engagement Effect on Co-Creation

The concept of social capital has become an interesting issue in management literature. Several authors have called for more study to be carried out on the dimensions of social capital. As part of the response to this call, we examined the influence of the dimensions of social capital on customer engagement to co-create. The Decision-Making Trial and Evaluation Laboratory (DEMATEL) technique was applied to analyze and capture the causal relationship visibly among the criteria and also measure the interaction level and the direction of influence of the criteria. The criteria identified to be crucial in influencing other criteria to co-create and the driving factors for problem-solving were: commitment (b8), Shared code and language (c9), shared narratives (c10), consumer engagement (d11), density (a3) and structural holes (a5). Criteria such as frequency of interaction (b7), trust (b6), social interaction (a4) and network ties were recognized as the core subjects that need maximum attention because they are effect-type attributes and cannot be directly improved unless through other criteria.


Introduction
This world is viewed as a global village full of interconnected networks between and among countries, regulatory bodies, related institutions, cooperative and competitive firms, suppliers, customers, and other stakeholders.These entities are all embedded in a well-coordinated network of interactions which has led to the formation of interconnected patterns [1].
Over the years, detailed studies in the field of social networks and the concept of social capital were brought into play, together with the knowledge of economics to demonstrate how rational individual or groups engage in purposive action [2] [3].According to [4], Social capital is "the sum of the actual and potential resources embedded within, available through, and derived from the network of relations possessed by an individual or social unit".The concept involves resources residing in the ties between people and among people and networks.Social capital has become one of the most popular concept drawn from sociological theory into other fields-political science [5] [6], psychology [7] [8] [9] and economics [10] [11] [12].Studies have shown it desirable effects on a wide range of social life, for instance educational attainment, community development, crime reduction, governance, health and knowledge exchange.Additionally, economic benefits such as career success, enhance job search effectiveness, facilitate resource exchange, reduce transaction costs and employee turnover, minimize redundancy, increase efficiency, induce information flow, enhance creativity and innovation, at all levels of society [4] [13] [14] [15] [16].For decades now, the concept has been exported into management literature as a source of value creation generating an interdisciplinary exchange of new insight and scope-a significant subject for firms [17] [18].Existing studies have shown the strategic role of social capital to firms due to its positive outcome on value creation [4] [17] [19].[4] points out the dimensions of social capital involving structural social capital, relational social capital and cognitive social capital.These dimensions are essential to consider for their impact on value creation.[20] argued that the dimensions of social capital have a profound influence on the success of value creation.The relation between the dimensions of social capital and value creation is significant for understanding why positions and relations in a network motivate for meaningful participation in value creation.The connections between and among actors that generate into meaningful participation for value creation are formed because they share in the same event which generates mutual benefits.The network of relation forms a basis for leveraging a variety of resources for firms-enhanced learning, innovation, reduction in research and development (R&D) cost, promoting relations and ties to other actors within the network hence, higher chances of firm's survival.For projects concerned, studies have shown decreases in transaction costs and improved project management.
For individuals and other stakeholders involved, a sign of potential increases associated with high performing projects and exposure to knowledge and knowledge exchange [17] [21] [22] [23] [24].
Though existing studies have established a relationship between social capital and value creation, yet they involve little about the application of DEMATEL to identify the dimensions that act as problem-solving drivers for value co-creation related issues and also to clarify the dimensions that need maximum attention to enhance value creation.Based on these the main contributions of this paper is can be highlighted as follows: • Provide an overall framework of the influence of the dimensions of social capital on consumer engagement to a co-creation task.• Introduce and elaborate on the concept of Decision-Making Trial and Evaluation Laboratory (DEMATEL) technique.
• Use DEMATEL technique efficiency to identify the importance and causal relationships between the dimensions of social capital on consumer engagement to co-create.

Social Capital
In social structure literature, social capital has been proposed as one of the most useful concepts that provide theoretical and procedural perspectives to examine important features in the social context of the firm-consumer relationship [3] [20].The firm cannot be studied within an independent context because its inception was built on social relations where every economic action undertaking and its corresponding outcome were rooted in the social structure.Drawing on this view, it is clearly understood that every economic activity is ingrained in social relations and it's greatly affected by actors' relations and the overall structure of the network of relations.
The conceptual foundation to stem up the definition of social capital seems blur due to the absence of unanimity in the different view-point of great thinkers such as [5] [21] [22] [25] [26] [27] [28] [29], [30] who inspired most of the current works in social capital.However, based on the work of the aforementioned authors [4] definition of social capital gives an explicit picture of social capital as a "joint asset" that upsurges the efficiency of a community in the resources exchange that occur in it [25].Furthermore, from a community point of view, it increases cooperation, adjustment and the productive value of social connection for the mutual benefit of its members relevant to the objective of the social organization [31] [32] [33].
Conventionally, firms were assumed to be linked to its consumers by an arms-length relationship and pursue self-interested and profit-seeking agenda without any explicit consideration for firm-consumer relations.Any ongoing relationship existing between them was believed to be profit-seeking motivated [16].[29], couldn't have put it better by stating that firms are not just made up of many discrete units that make self-centered decisions constrained by scarce resources anymore, but rather, how embedded they are in a network of relations determine their strategic conduct.
Examining the relationship of social capital on the creation of intellectual capital by [4], clarified the dimensions of social capital as: structural, relational and cognitive.The author's discussion on the structural and relational dimensions of social capital was mostly based on the argument of [3] [16].Where the structural dimension described the tie architecture and exchange pattern between and The last dimension of social capital, cognitive, focuses on the system of meaning-shared representations and interpretations with focal features of shared code and language, and shared narratives [4] [36] [37].

Value Creation and Value Co-Creation
Based on the production-oriented perspectives, the idea of value creation can be traced back to the early 20 th century industry principle, where the value chain concept introduced by Michael Porter in the 1980s gave the firm an integrated framework to identify, manage the cost of designing, producing, marketing, delivering and supporting goods and services.Value creation was predominantly the responsibility of the firm which occurred inside the firm through its activities in that the firm strongly believed its competitive edge of ability to innovate and placing more emphasis on value delivery [38] [39] [40].
As showed by [41], value is internally produced and distributed in the marketplace, through the exchange of goods/services, and money, and without any direct interference by customers.This conventional concept about value creation can be identified as the backbone of the goods-dominant logic (G-D logic) view, where value is embedded into the product of economic exchange during the firm's production process and is delivered to be sold.The value of the good signifies the market price the consumer is willing to pay.
Literature is silent on the actual definition of value creation and blurs on the distinction between value creation and value co-creation [42] [43].The concept is generally treated as co-creation, emphasizing the inclusive activities by both the firm and the customer [40] [43] [44].Its explanation has a strong association with the service-dominant logic (SDL) which states that always, value is co-created with the client-customers role is to be the value creator and perhaps also a value co-creator [39].Viewing value creation and co-creation from the SDL put the firm in charge of value creation and the consumer is called to join in the whole activity of creating as a co-creator [45].This leads to a web of interconnections with consumers and other stakeholders where the "we" proposition becomes much broader and powerful than just "I" and "you." in value creation [46] (Figure 1 and Table 1).

Social Capital Shaping Consumer Engagement to Co-Create
In examining the relationship among parties involved in value creation, the concept of social capital make available valuable and extensive view for understanding the role of its dimensions on consumer involvement in value creation [50] [64].According to [4], the concept is central to the understanding of institutional dynamics, innovation and most importantly value creation.Reviewing Source: Own study.[68] [69].The bond or connections that generate among these exchange partners (consumers) within a social structure serve as a drive to gain complementary know-how and/or speed up R&D processes to accomplish co-creation task [70].
Literature is explicit on the assumption that similarity of partners participating in the same event is beneficial for idea generation, speedy dissemination of information among partners thereby enhancing efficiency and cooperation that support value creation [51].The network partners involved can create value through their engagement via frequent interactions to motivate and create solidarity benefits [14].According to [2], solidarity benefits and valuable information supporting value creation are associated with strong ties as opposed to the argument of both [16] [64] that new and valuable information to create value occurs by bridging weak ties.Supported works from [57] [71] indicates that successful transfer of new information via stronger ties are possible because of structural bridging qualities and the willingness of actors to cooperate due to relational qualities.Again, [72], shows that the strength of strong ties in the creation of value for consumers makes it possible to combine the solidarity benefits of strong ties with the new and valuable information generated and the benefits of weak ties in value creation.Lack of connection between actors within a network.This lack of disconnection between actors exposes them to new networks with diverse experiences and different ideas, which offers them (actors) superior information, opportunities and the possibility of manipulating information flow between disconnected parties for their benefits Relational(B) The confidence actors have in one another that create the conditions for successful information exchange and resource flow.

Frequency of interaction (b 7 ) [36] [51] [57]
The rate or regularity of exchange among actors.Interacting frequently has been found to create some sort of norms of reciprocity and relationship-specific investigations that make it easier for information sharing between firms and their clients

Commitment (b 8 ) [58]
A sense of duty, obligation and responsibility to engage in an action that arises from frequent interaction leading to a value generating object.

Cognitive (C)
Shared code and language (c 9 ) [4] [36] [53] How actors organize, understand, discuss, ask questions and exchange information within a common language to facilitate the ability to gain access to other actors and information.
Shared Narratives (c 10) [4] All those stories and metaphors that support persuasive arguments and conclusive proof of good ideas and its exchange and sharing.The value generating object or subject through interactions as individuals use their social ties as a mechanism to exchange product/service related information.
weak structural positions (structural holes and network position) bring to light the most intriguing value creating ideas with the most ground-breaking solutions.Information from one partner to another is directly influenced by the strength of their relationship.However, the value of the information may be higher if it is received from weak ties.In substantiating [52] [60] arguments, [64], stated that network ties preferably strong ties have a stronger association

DEMATEL Technique
DEMATEL is one of the most widely accepted and beneficial techniques to measure and analyze structural models relating to cause-effect relationships and the interdependence among complex testing criteria [73].These relations among the evaluating criteria is supported by numerical values representing the strength of influence.The technique aids in understanding the structural relations among elements and help solve complicated system problems [74].
In the sphere of human activities of decision making and management characterized by uncertainties and complexity, it is important that suitable established models are chosen in accordance with the problem at hand so that an in-depth analysis into the nature of the problem can be conducted.This makes DEMATEL the appropriate model to be used since it works with specific features of objective affairs to confirm the relationship and ascertain the interdependence among variables [75].DEMATEL has been applied in many areas including supply chain management [76]  preference by similarity to ideal solution (TOPSIS), analytic network process (ANP) and analytic hierarchy process (AHP), VIseKriterijumska Optimizacija I Kompromisno Resenje (VIKOR) for evaluating the spare-part industry [80], reliability allocation [86], e-learning evaluation [87], product concept evaluation [88] and innovation support system for higher education [89].As part of this study, the DEMATEL was used to determine the multifaceted relationships and the level of influence each element has on others.

DEMATEL Method Application
Building on the opinions of ten experts, ten (10) sub-dimensions of social capital were analyzed: network ties (a 1 ), size of the network (a 2 ), density (a 3 ), social interaction (a 4 ), structural holes (a 5 ), trust (b 6 ), frequency of interaction (b 7 ), commitment (b 8 ), shared codes and language (c 9 ).Shared narratives (c 10 ).Then, consumer engagement (d 11 ), and co-creation task (e 12 ).The experts were called on to examine the level of relationship these sub-dimensions have on consumer engagement to a co-create task.The experts included university professors, social network analyst and Ph.D. candidates whose research area are centered on the study in question.The formulating steps of the technique summarized as follows: Step 1: Scale definition.
The influence scale is defined to show the impact level of the criterion.For this study, the values for the influence score ranges from 0 to 4.Where 0 = no effect, 1 = low effect, 2 = moderate effect, 3 = high effect and 4 = very high effect.
Step 2: Construct a relationship matrix An assembly of experts and factors were used in this step.Each individual assessor is requested to evaluate the level of direct influence between two criteria in a pair-wise comparison including the consumer engagement and the co-creation task.In so doing a direct-relation table was created which was symbolized as xij signifying the degree to which the experts view factor i effects on factor j. All the diagonal elements are zero (0).
Afterward, the judgments from experts are all aggregated to attain the average matrix A = [a ij ] indicated in Table 2.The aggregated matrix A was built using Equation ( 1).
where, e = total number of experts, m = individual expert.
In applying Equation ( 2) and (3), a normalized matrix A was constructed on the bases of the column vector and the maximum value (Table 3).Source: Own study.
N QX = Step 4: Construct a total relations matrix.
Total relations matrix T was constructed by using Equation (4).By doing so, the overall strength of influence and effect from other criteria are determined.

( ) ( )
Step 5: Compute the sum of the rows and column in matrix T, to obtain the total values for C and R using Equations ( 5) and (6).Where C signifies the level of direct or indirect effects on other criteria, and R, the level to which it is affected by other criteria: (Table 4) Step 6: Compute a threshold value by averaging the elements in matrix T. This is to help do away with minor effects in the matrix T elements with the intention of minimizing the complexity of the impact relations-map.If the influence level of an element in the matrix T is higher than the threshold value then the element is included in the influence relations map (IRM) (Table 5, Table 6 and Figure 2).

Results and Discussion
Table 3 portrays the computation of the direct and indirect influence of the variables in step 4 with a threshold value of 0.173.Based on Table 3, the importance of the criteria can be prioritised as b 7 > a 4 > b 8 > d 11 > b 6 > c 10 > c 9 > a 3 > a 5 > a 1 > a 2 > e 12 grounded on the values of (r + c).According to the order of importance of the criteria, frequency of interaction (b 7 ), was identified as the most important criterion with a value of 5.179, whereas, co-creation task was the least with a value of 2.892.On the other hand, density (a 3 ); trust (a 5 ); commitment Source: Own study.• If (r − c) is negative and (r + c) is large: then attributes are the core subject and needs maximum attention; nevertheless, they are effect-type attributes, and cannot be directly improved.It consists of frequency of interaction (b 7 ), trust (b 6 ), social interaction (a 4 ) and network ties (a 1 ).
• If (r − c) is negative and (r + c) is small: then, an indication that the features are independent and its effects on other attributes are less.This involves network size (a 2 ).Taking the foreknown analysis into account, the level and the direction of influence of category one shows that relationships geared toward offering greater value on task must be foundered on value-based commitment to increase the connection and cooperation of actors to induce joint efforts [91].Consequently, there is a reason to believe that, commitment can persuade actors within a social system to share information and pursue joint expectations of a team via shared code and language, and shared narratives.Shared code and language, and shared narratives bring a common understanding of product/service-related ideas while improving coordination and integration of actors from diverse backgrounds.It also ensures established grammar and vocabulary for communication thereby, resulting in a deeper involvement of the consumer by virtue of task-related and personal interaction with others within the network.
With reference to network density and structural holes, according to [13], these two dimensions are the most debated issues in social networks due to it opposing views on value creation.While density propagate network cohesion and partners connectedness leading to high-quality and easy information distribution in a dense network increasing value creation chances, structural holes look at the disconnection between actors and exposing them to new networks with diverse experiences and different ideas, which offers them (actors) superior information, opportunities and the possibility of manipulating information flow between disconnected parties for their benefits [64].Although both views differ, yet, since, in value co-creation situation, information and knowledge are the primary and major input, it is then logical to assume structural holes to be a threshold for knowledge heterogeneity.
In category two, co-creation task can produce outcomes that promote high creativity if it unearths customers interest otherwise its importance is insignificant.This should be the focus of firms to make co-creation pay-off.
According to the third category, frequency of interaction (b 7 ), trust (b 6 ), social interaction (a 4 ) and network ties (a 1 ) cannot be directly improved unless other factors which are also key facilitators to consumer engagement in value creation have been developed.Firms should ensure co-creation tasks are geared toward the interest of the consumer to improve the criteria.Lastly, category four indicates a significant influence on social interaction (a 4 ) and frequency of interaction (b 7 ).

Conclusions
In this study, we described the concept and the dimensions of social capital and discussed it influence on consumer engagement to co-create.The social capital dimensions examined were network ties, size, density, social interaction, structural holes, trust frequency of interaction, commitment, shared codes and language and shared narratives which also included consumer engagement and co-creation task.To examine the dimensions on consumer engagement to co-creation, DEMATEL model was applied.The model aided in analyzing the causal relationships of the variables and helped determine their level of interactive effect and direction.
Lastly, the core criteria which were critical for promoting co-creation tasks success were identified.The criteria identified to be crucial in influencing other criteria, and the driving factors for problem resolving were commitment (b 8 ), Shared code and language (c 9 ), shared narratives (c 10 ), consumer engagement (d 11 ), density (a 3 ) and structural holes (a 5 ) and the core criteria that need maximum attention because they are effect-type attributes, and cannot be directly improved unless through other criteria were frequency of interaction (b 7 ), trust (b 6 ), social interaction (a 4 ) and network ties (a 1 ).

Figure 1 .
Figure 1.Construct model of social capital dimensions on consumer engagement to co-create.

Figure 2 .
Figure 2. Interactive matrix distribution of the 12 criteria.

Table 1 .
Summary of authors' viewpoint on the criteria for analysis.The pattern of connection between actors i.e.Who you reach and how they are reached.The degree of interconnection among the actors of a network.Possible connections in a network that are actual connections.Density propagate network cohesion and partners connectedness leading to high-quality and easy information distribution in a dense network.
While Coleman's and Burt's views on social capital are seen differently because they analyze different features of the social system, both views complement each other in that strong ties (quality of relationships) with creation because information moves faster and is more credible due to its rapid and reflected actions.Implying, weak network configuration without strong ties have no value: they lead to no action.
A. A. Nusenu et al.DOI: 10.4236/ojbm.2019.72041603 Open Journal of Business and Management with value

Table 2 .
Average matrix A.
Source: Own study.

Table 6 .
Significant indicators of the variables.
Source: Own study.