The Relevance of absorptive capacity in firms’ innovation strategies measured via bibliometric analysis

*Corresponding author: ernest.vlacic@gmail.com Article history: Received 10 01 2017 Revised 14 02 2017 Accepted 22 03 2017 This article was presented at the 5th International OFEL Conference on Governance, Management and Entrepreneurship. The Paradoxes of Leadership and Governance in the Postmodern Society. (April 7th 8th, 2017, Dubrovnik, Croatia, Governance Research and Development Centre CIRU), Zagreb, pp. 438-450


INTRODUCTION
In their quest to find the appropriate term to describe organizational capacity to recognize the value of new external information (knowledge), its assimilation and commercial implementation, Levinthal (1989, 1990) suggested the term absorptive capacity (ACAP). The definition of ACAP was formulated as the ability of a firm to identify the value of new, external information, assimilate it, and apply it to commercial ends, where authors largely perceived it as a function of prior related knowledge.
In the evolution of the discipline, a significant contribution was given by Zahra and George (2002), who recognized absorptive capacity as a key dynamic capacity that strongly influences the nature and sustainability of competitive advantage. The concept of ACAP has been used to explain various organizational phenomena (Zahra and George, 2002) in strategy (Nahapiet and Ghoshal, 1998) and technology management (Schilling, 1998;Rush, Bessant and Hobday, 2007;Rodriguez, Wise and Martinez 2013).
This paper is primarily focused on the in-depth analysis and review of the ACAP related research bibliography and registered publishing databases, with a particular emphasis on the relationship of ACAP and innovation strategies. Therefore, the principal objective of this paper is to determine the relevance of ACAP and provide a literature overview in the field of ACAP via a comprehensive bibliometric analysis. Notably, the specific objective is to assess the relevance of the ACAP research in firms, with a particular focus on innovation and innovation related strategies.
As the instrument to achieve our defined research objectives we have selected a commonly used methodological systematic review of the available bibliography in a form of a simplified meta-analysis (Dabić et al. 2014(Dabić et al. , 2015. Methodologically, the first step was to perform a thorough exploratory secondary analysis on the research literature related to the existing knowledge of the selected ACAP field. We only retained articles from journals indexed in the Web of Science database, as it can be considered most rigour and qualified. Articles in the database were retrieved using the search function and the lexemes (TS=(absorptive capacity) AND TS=(innovation) AND TS=(company OR firm OR SME) AND TS=(performance)) AND DOCUMENT TYPES: (Article).The search is conducted on February 20th, 2016 resulted 1 288 articles which have been cited 25 958 times.
The relevance of the topic can be corroborated by several earlier studies where meta-analysis or systematic reviews have been used (Maldonado, Vera andKeller 2015, Lewandowska, 2015).

ROLE OF ACAP IN INNOVATION STRATEGIES
In the context of innovation, a firm's absorptive capacity refers to its ability to assimilate and manage acquired knowledge, aiming at improving innovation outputs and achieving a competitive advantage (Abreu et al., 2008). In the world of globalization and fierce competition, where competitive advantage increasingly relies on knowledge, firms are trying to learn and develop skills faster than their rivals (Teece and Pisano, 1994). These skills need to be more dynamic in order to achieve an advantage over one's competitors. Dynamic capabilities enable firms to adjust to changing conditions that govern the market (Teece, Pisano and Shuen, 1997).
According to Dosi, innovation, which is closely and inextricably linked to the concept of knowledge, is a complex process at the level of knowledge research and its exploitation (Dosi, 1988). Innovation, as a direct result of knowledge or combinations of knowledge, is considered a fundamental component of entrepreneurship and a key element of business success (Dabic et al., 2009). Innovation and innovation potential are widely considered and recognized as some of the most important factors of firms' competitiveness. Today, innovation is a major factor in improving firms' productivity and efficiency, as well as product quality, and reducing production costs and production time.
According to Radosevic (2004), competitiveness and innovation activities are linked to national innovation capacity, which includes the implementation of R&D activities, dissemination of knowledge, market demand and, ultimately, absorptive capacity. Radosevic (2004) states that there is a general consensus among economists that innovation in enterprises play a key role in the process of sustainable long-term economic growth.
Research links between ACAP and innovation processes in firms are the main subject of this paper, However, ACAP should not be explored only as an important function in firms' implementation of innovation and related performances, but also in the context of its competitive advantage. From the resource-based view (RBV), a firm's existing knowledge or its ability to acquire new knowledge is the highest ranking strategic resource that a firm can own. Many authors (Barney 1986, Grant 1996, Argote and Ingram 2000 use a resource-based approach as a basis for a sustainable competitive advantage, which essentially presupposes the existence and proper management of resources and capacities within the firm. These resources then participate in achieving a sustainable competitive advantage (SCA).
Absorptive capacity is a basic function of the fundamental processes of learning in firms and can be a source of competitive advantage. Thus developed, ACAP enables the identification, adaptation and embodiment of external knowledge within firms' own routines (Cohen and Levinthal, 1990;Lane, Koka and Pathak, 2006). Knowledge-based competitive advantage is innovative per se in the way it develops in the process of creating new products, services, processes or structures. Firms based on knowledge can not only respond quickly to customer needs, but also actively shape their expectations and goals for future products and/or services (Gurteen, 1998).
Firms achieve their competitive advantage not only by using their own key resources, but also by using their own internal ability to reconfigure their knowledge base and adapt to the conditions of market fluctuations (Kleinschmidt, De Brentani and Salome, 2007). Therefore, the ability to produce, share and use knowledge, which represents essentially the core of a firms' ACAP, can be considered crucial for gaining and maintaining a competitive advantage (Barney, 1986;Cohen, Levinthal, 1990).
In his work Chauvet (2002) claims that the transfer of knowledge is one of the key prerequisites to achieve a sustainable competitive advantage, thus reaffirming the direct link of the SCA based on knowledge and absorptive capacity. In this way, knowledge is a natural moderator connecting absorptive capacity and sustainable competitive advantage. Chauvet goes on to say that, in fact, ACAP and knowledge transfer are forming a closed circuit, and puts knowledge in the first place, its analysis in the second and the transfer of knowledge in the third place, all in order to achieve and maintain a sustainable competitive advantage.
When it comes to the size of firms, research in the field of strategic management suggests that one of the most important distinctions in the functioning of large companies vs. SMEs is their ability to overcome barriers and constraints that come from their capacity or size. Thus, the prevailing opinion is that small and medium enterprises are very limited in terms of business relationship development, particularly in terms of the outside world and therefore possess limited ability to acquire new knowledge from the outside world. (Grandinetti, 2016). Grandinetti further says that the above statement becomes clearer when one considers that the resource theory views sustainable competitive advantage as a priority for learning resource/capacity. Das and Teng (2000) argue that external resources available to a firm (external knowledge, materials or other resources) are not in its immediate direct ownership, but are still within reach through developed partnerships and networks with other organizations that the firm can develop in the environment. Grandinetti (2016) also states that some authors even suggest that the "interorganizational relationship should be seen as a specific modality of organic growth of businesses" (which especially applies to SMEs), while at the same time it can be seen as a lever supporting their individual growth (McKelvie andWiklund, 2010 Furlan, Grandinetti andPaggiaro, 2014).

Research on ACAP in Croatia
When it comes to scientific research on absorptive capacity in Croatia, according to available information, it has not been the focus of the Croatian scientific community so far. We may assume that the reason lies in the fact that producing thorough and relevant ACAP related studies requires a multidisciplinary scientific approach that would encompass and cover its complex scope. Therefore, in the relevant available and published literature in Croatia there is a noticeable lack of conceptual and empirical scientific knowledge about absorptive capacity of firms; in particular, there are no documented procedures of the operationalization of ACAP at any level.
Some documents, such as 'Strategy for Fostering Innovation' (MINGO, 2014), state that the limited and low level absorptive capacity of domestic firms, especially in the segment of small and mediumsized companies, limits the acquisition and application of available domestic or foreign knowledge and its transfer into technology development. In addition, the overall ability and capacities of firms' research and development in the private sector has been influenced by some historical factors. In particular, by the restructuring and privatization of state-owned enterprises in the 1990s, which resulted in the closing down of a large number of R&D departments, which had once been wellintegrated in the production of state-owned enterprises. Today, the national institutional framework is becoming increasingly aware of the role of ACAP in firms, thus in the recently published 'Strategy for Smart Specialization in Croatia for Period 2016 -2020' (MINGO, 2016) ACAP is considered one of the most important aspects of Smart specialization strategy.

META-ANALYSIS OF ACAP BIBLIOGRAPHY
Since ACAP is a hybrid between social/humanistic and technology learning sciences, we have decided to search through Web of Science (WoS) Core Collection as the primary source of information. In order to determine the relevance of ACAP, as suggested in Dabic, González-Loureiro and Furrer (2015), the first step was to systematize filtered bibliographic records contained in WoS.
Our search included works that had been published until the end of 2016, and the key words used were absorptive capacity, innovation, firm or company, performance. As a result, 1288 papers were identified to contain composites of researched keywords.
Firstly, we observed the chronological profile of ACAP-related published papers, where the growth curve of published papers has been exponentially increasing since the first records in the early 1990s ( Figure 1). A noticeable increase in publishing can be observed from the mid 2000s onwards, where the discipline has been strongly advancing in its visibility and scientific relevance.  Table 1 shows the top twenty ACAP publishing journals that cumulatively cover more than 45% of total publishing. The applicability of ACAP in specific areas covers a wide range. Our research has identified 30 areas that are covered by at least one publication. These papers are often classified through a multicategory selecting principle, which means that ACAP is presented as a multidisciplinary field. A large number of published papers is related to technological innovation in engineering, public administration and operation in research and development. However, most of them are published in the area of business and economics, which means that the majority of researchers and research interest derive from the business sector. Table 2 shows the first fifteen areas of research in the classification are shown in Table 2. When it comes to geographical distribution, the most productive authors of the ACAP related publications in the defined research scope derive from the USA, Spain, England and P.R. China  Table 3.

CONCLUSIONS
The results of the meta-analysis showed a noticeable multidisciplinary and interdisciplinary character of the selected topic -absorptive capacity of firms. The analysis showed that the area of ACAP is increasingly attractive, very actual and scientifically relevant, particularly in areas where innovation and high added value products/services are identified as key factors in achieving and maintaining a long-term sustainable competitive advantage. As confirmed by the overview of researched areas, ACAP often explores interactions related to innovation in firms, usually particularly focusing on technological innovation and R&D, regardless of being realized internally or externally, or both.
Due to its multidisciplinary and interdisciplinary character, which requires a thorough understanding of a large number of operating variables in firms, ACAP is often too complex to be operationalized.
This complexity leads to a variety of contextual approaches in its measurement and operationalization and so far none of the existing models or methodological approaches have shown themselves to be ideal or highly prescriptive for determining a firm's ACAP.
The importance of ACAP is primarily recognized in developed countries (USA, Spain, UK, Denmark), but also in the leading emerging world economy, P.R. China. It may be concluded that countries and economies with somewhat stronger industrial backgrounds, past or future, are more inclined to explore and understand the ACAP interactions and influence aiming at firms' competitiveness.
Unfortunately, ACAP has been rather neglected and unembraced in the authors' own country, Croatia, where almost none or very little research activity has been recorded in relation to the ACAP field. This is particularly visible in terms of ACAP related publishing, which is almost nonexistent.
Among other objectives, this paper aims at raising awareness of the importance of ACAP and possibly encouraging interest in ACAP publishing within the Croatian research milieu. This would be a step forward in assisting national firms and the institutional framework in understanding and creating a better environment for boosting innovation, which will consequently stimulate the increase of the firms' international competitiveness.
Finally, the presented trends show a continuous increase in the publishing volume, which leads us to conclude that ACAP will continue to be a very attractive and interesting area for further research not only for researchers in Croatia, but at the global level as well.
Funding: This research received no external funding