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BIBLIOMETRIC ANALYSIS OF THE SCIENTIFIC PRODUCTION OF THE
CONCEPT OF INTELLECTUAL CAPITAL (1980-2012)
Caroline Rodrigues Vaz (UFSC) [email protected]
Paula Regina Zarelli (UFSC) [email protected]
Mauricio Uriona Maldonado (UFSC) [email protected]
Paulo Mauricio Selig (UFSC) [email protected]
João Paulo Zarelli Rocha (UFSC) [email protected]
Purpose -
– The purpose of this paper is to explore the nature of research topics and methodologies
employed in existing studies of intellectual capital.
-The objective of this study is to conduct a meta-review analysis of the intellectual capital
literatures by investigating research productivity and conducting a citation analysis of
key-words, authors and journals of impact factor.
Design/methodology/approach –
- The study consists of a bibliometric review of 674-refereed articles on intellectual
capital.
Findings –
- The bibliometric analysis reveals that in the literature about intellectual capital there
was a significant evolution in works related with the subject Intellectual Capital in the
last years. 302 journals were identified, being the main one Journal of Intellectual Capital,
with 134 papers, for it being dedicated to exchange of information about practises in all
aspects of creation, identification, management and measurement of intellectual capital
on enterprises, followed by the Journal of Learning and Intellectual Capital with 33
papers. Regarding the key words, the subject of this research took the first place,
intellectual capital, with 400 repetitions, followed by human capital with 113 and social
capital with 84 repetitions. As for the most relevant authors stands out Bontis (1999);
Roos (2000, 2002, 2006, 2007, 2011); Edvinsson (1996, 1997, 2001, 2008); Johnson
(1999); Stewart (1994); and Chen (2006, 2012).
Originality/value – To the best of the authors’ intellectual capital, this paper presents a
evolution of studies about concept of intellectual capital on literature review on this topic
that has previously been published in academic journals.
Research limitations/implications (if applicable) –
The work is only bibliographic.
1. Introduction
The idea of generating competitive advantages from the creation and protection of
knowledge has originated a strand with strong impact in the professional field nominated
“knowledge management” (WIGG, 1997).
Thus, knowledge management under the optics of Bukowitz and Williams (2002,
p. 17) is “the process by which the company generates wealth, from its knowledge or
intellectual capital”. Herrero (2005) believes that the company’s value is composed by
the financial capital (tangible asset) and the intellectual capital value (intangible asset),
the latter understood as intellectual matter (knowledge, information, industrial property,
experience) that can used to generate wealth.
According to Pacheco (2005), the intangible assets are having a dominant role in
wealth generation in the corporate scope, because they are considered key-competence
and driving force to value their own tangible assets, reach objectives and integrate
management efforts.
In consequence of the importance of the intangible assets and the very wide role
of its occurrences in the corporate branch, this research pays special attention to those
that compose the companies’ Intellectual Capital (innovations, brand, corporate image,
among others).
For Stewart (1998), the Intellectual Capital corresponds to a set of knowledge and
information found in companies, which aggregates value to the product and/or services,
through intelligence and non-monetary capital application on the undertaking.
The companies of the 21st century present cycles always more accelerated of
innovation, show that knowing how to manage the intellectual capital has become an
essential pre-requisite to business success, since success is more and more based in
intelligence aggregation to their processes, products and services (GRACIOLI, 2005).
In this matter, Tasca et al. (2010) show the problematic that many researchers deal
with while trying to justify the theoretical referential selected to sustain their research.
Situation that, according to the authors, denotes the relevance of a structured process to
this end, in a way to provide a robust theoretical board.
On this context, emerges a research problem that orients the making of the present
paper: How to build the demanded knowledge for a researcher when in the beginning of
a research in the intellectual capital subject in order to provide the necessary conditions
to, in a second moment, seek opportunities to contribute in the chosen thematic?
To answer this research questions, the objective of this paper is to conduct a meta-
review (bibliometric analysis) of the literature about intellectual capital investigation the
productivity and conducting the analysis of citations, researchers, institutions and
countries from 1980 to 2012.
The reach of this general objective will be me possible by the following
objectives: (a) Selecting a relevant Bibliographic Portfolio about intellectual capital; (b)
Perform a bibliometric analysis of the chosen bibliographic portfolio and its references,
aiming to identify journals, papers and key words that are highlighted, as well as the
evolution of the subject.
The paper presents itself in five sections, being the first composed by the
introduction. Followed by the presentation of the theoretical referential of intellectual
capital on section 2. The third by the methodological procedures in the research. The
fourth composed by the procedures on the selection of the theoretical referential, being
also subdivided in preliminary investigation, selection of papers that will compose the
portfolio for the research and, bibliometric analysis of the paper portfolio for the
theoretical referential at issue. And, at last, presenting the final conclusions.
2. Intellectual Capital
The Intellectual Capital has begun in Management by Peter Drucker, with an empirical
concept, which sought to analyse the intervenient elements in the generation of value of
companies (GRACIOLI, 2005). For Stewart (1998), the intellectual capital corresponds
to a set of knowledge and information found in companies, which aggregates value to
product and/or services, through the usage of intelligence and not of monetary capital for
the undertaking.
Hence, the value generated by the intellectual capital depends of the human capital, which
is the most important factor for survival and renovation of companies in all their activity
levels, states Pacheco (2005).
Norton and Kaplan (2000), cite that in a study made with different companies, the
accountable value of tangible assets was not bigger than 15% of its market value, the
remaining value was attributed to the intangible assets, associated with knowledge,
intellectual and human capital.
Companies of this century are not only more connected to the industrial era, are also more
dependent of their employees, states Lev (2001), to the extent that aggregate knowledge
to productive processes and to management in general. Board 1 shows the general view
of the categories of existent resources within a company, and, at the same time, analyses
them in topics, what constitutes the material resources (tangible) and immaterial resources
(intangible) subject to being capitalised.
Board 1 – Categories and Resources of a company
Source: Granstrand (1999, p. 7)
In general, these immaterial categories (intangible) depend, directly or indirectly, of the
existence of qualified human resources. Hence, as exists a concern with intellectual
capital, there will be a higher valuing of the human factor on companies.
Stewart (1998, p. 13) admits that the Intellectual Capital, as a group of occult values that
aggregate value to companies, allowing its continuity. Taking into account such concepts,
it can be said that the Intellectual Capital is a set of values, be it capital, an asset, or a
resource, both are found occult and all tend to aggregate real value to the company.
Lynn (2000), from a variety of sources, develops a model of three components for
intellectual capital that had been identified in the research of Dzinkowski (1998):
Board 2 – Elements of Intellectual Capital
Source: Dzinkowski (1998).
a. Human Capital: According to Lynn (2000, p. 2), the human capital is presented as
know-how, capacities, abilities and specialisations of human resources of a company, this
is one of the critical assets in the intellectual capital group, being that the management of
human capital frequently creates and sustains wealth of a company.
b. Organisational or structural capital: Covers the remaining elements of the intellectual
capital, including information systems and values, together with elements of intellectual
property, such as patents, copyright, brands, etc. The organisational (structural) capital is
the backbone of the company itself, which involves their organisational capacity,
including its management planning, and control systems, processes, functional grids,
policies and even its culture, that is, all that helps a company to generate value
(PACHECO, 2005).
c. Relational capital (customers and suppliers): Is identified as a separate entity and,
according to Lynn (2000, p. 2), embodies “any of the connections that people outside of
the company have with it”, together with customer loyalty, market slice, amount of orders,
amount of orders, etc. Regards connections of a company with its customers and
suppliers, what also creates value through loyalty, better markets, speed and quality. In
this way, it can be translated in measures of regular customers whose loyalty generates
regular sales and reduce the costs of seeking new customers.
According to Dzinkowski (1998), there is a model of creation of value of intellectual
capital that is composed by three instances that interrelate to form the value of human
capital, customer capital (relational) and organisational (structural) capital. The creation
of value , completely, is the main goal of all commercial activities, while the fundamental
function of traditional accountability is to supply trustable information to external
investors, and for that, depends of the sub adjacent economy to all commercial activities.
3. Methodology
This section presents the classification of the research and the methodological procedures
used in the construction and analysis of the bibliographic portfolio about intellectual
capital.
3.1 Research classification
The research is characterised as of theoretical nature in relation to the approached subject.
As for its technical procedures, falls as a bibliographic study, because it will treat data
and verifications stemmed directly of already done works of the researched subject. From
the point of view of the objectives, it can be classified as explanatory and descriptive,
since it will seek specific information and characteristics of what is being studied (GIL,
2007).
3.2 Research procedure
The bibliometric analysis is a technique for mapping of the main authors, journals and
key words about a subject. Uriona Maldonado, Silva Santos and Santos (2010) states that
these techniques are tools that are supported in a methodological theoretical recognised
scientifically, which allows the use of statistical and mathematical methods to map
information, through bibliographic registries of documents stored in the data bases.
In complement, it is highlighted the bibliometric analysis presented by Ensslin et al
(2010), as follows:
And the process of quantitative evidencing of the statistical data of a
defined set of papers (bibliographic portfolio) for information
management and scientific knowledge of a given subject, made through
document counting.
For the bibliometric analysis were utilised the constant papers of the bibliographic
portfolio and its references for ascertaining the relevance degree of authors and most used
key words.
Was employed as intervention tool in this work the process for bibliographic review,
according to the constructivist view, called ProKnow-C (Knowledge Development
Process – Constructivism), proposed by Ensslin et al. (2010).
The intervention tool proposed by Ensslin et al. (2010) for the selection of a bibliographic
portfolio is consubstantiated in a subdivided process in four phases: i) selection of the
crude papers bank: composed by the definition of the key words; definition of the data
bases; seeking of papers in the data bases with the key words and the key words adherence
test; ii) filtering: composed by the filtering of the crude paper bank regarding redundancy
and filtering of the crude paper bank non repeated regarding title alignment; iii) filtering
of the paper bank: composed by the determining of scientific acknowledgement of papers;
identifying the authors; iv) filtering as for the alignment of the whole paper, also through
the ProKnow-C, the present paper will proceed the bibliometric analysis of the papers
that compose it.
The software EndNote X5 (ENDNOTE, 2011) was used to generate and treat the
collected references. The EndNote tool is a manager of bibliographic references made by
Thomson Scientific that works integrated to the Web of Science. Eases the work of
investigation and writing of the scientific work and allows reuniting bibliographic
references from online data bases, import metadata and group them in many ways.
4. Results and Discussion
4.1 Construction of the bibliographic portfolio
Lacerda (2010) states that the evolution of information systems, the use of data
bases (indexed systems), is to ease searches for bibliographic references and for the
construction of theoretical platforms for future researches.
The selection of papers was made in May, 2012, in the Web of Science, Science
Direct, and SCOPUS data bases, using as criteria to seek the terms “Intellect*” and
“Capital” in the key-words, titles and abstracts of papers. Since there was interest in
understanding the construct and its origins in a deeper way there wasn’t any temporal
frame. In other another words, all selected papers were analysed. The truncation symbol
“*” was used to amplify the number of answers, because it recovers plurals, expressions
with the same radical and graphic variations of the key words.
- Web of Science: multidisciplinary base that indexes only the most cited journals
in their respective fields. Is also an index of citations, informing, for each paper,
documents cited and documents that cite it. There are, today, more than 9,000 indexed
journals.
- SCOPUS: abstract, scientific literature, literature citations and information
sources database. It indexes more than 15,000 journals, circa 265 million internet pages,
18 million patents, among other documents.
- Science Direct: availability of Elsevier and other editors publications, covering
the fields of Biological Sciences, Health Sciences, Agricultural Sciences, Exact and Hard
Sciences, Engineering, Applied Social Sciences, Human Sciences, Languages and Arts.
In these three consulted bases were established search criteria, such as: paper only
searches, field (management, business, economics, operations, engineering,
multidisciplinary, education, industrial engineering, environmental business, social
finance and social sciences) and topics (social capital, human capital, structural capital,
intellectual capital and sustainable capital). As for the period, it was not stipulated to
verify the subject evolution. 2260 papers were found, as shown in image 1.
Image 1 – Amount of papers in the data bases
Source: Authors (2012)
Then, the main filtering of crude articles was made through: identification of
duplicated papers and reading of abstracts, leaving only the aligned papers with the
subject, as shown in image 2.
Image 2 – Filtered articles
Source: Authors (2012).
4.2 Bibliometric Analysis
4.2.1 Subject Evolution
It was identified that the year of publication of the 674 selected papers. Image 3 shows
the year evolution, which ranges from 1988 to 2012 of works made about the subject.
Series1; Wef of
Science; 531
Series1;
SCOPUS; 1434
Series1; Science
Direct; 295
Am
ou
nt
Data bases
•Crude papers
2260
•Unduplicated papers
1935
•Papers aligned with the subject
674
•Amount of citations
417
•Papers available for research
190
Image 3 – Evolution of the subject with published scientific works.
Source: Authors (2012).
It can be observed that there was a significative evolution of related works with
the subject Intellectual Capital in the last few years. Beggining in 1988 with “Technical
Knowledge and Intellectual Capital in door thrust of Chinas open door Policy” made by
SINGH, K. that treats technical knowledge and intellectual capital in the port-momentum
in China’s politics. Although, the significative raise initiated in 2005 with forty-four
papers, in 2011 with 133 and, until May, 2012 with fourty papers. And this has a tendency
to grow.
4.2.2 Relevant journals
Were identified 302 journals in the bibliometric portfolio, image 4 shows the ones that
most obtained selected papers. The most highlighted journals were Journal of Intellectual
Capital with 134 papers, due to being the main journal in the Intellectual Capital field,
for being dedicated to exchange of information about practises in all aspects of creation,
identification, management and measuring of intellectual capital in enterprises.
Followed by Journal of Learning and Intellectual Capital with 33 papers, which
treats works that involve innovation influence, learning, knowledge management and
intellectual capital about the making of competitive advantage for companies in the new
age of economy.
Série1; 1988; 1Série1; 1994; 1Série1; 1996; 3
Série1; 1997; 9Série1; 1998; 9Série1; 1999; 8Série1; 2000; 11
Série1; 2001; 8Série1; 2002; 7Série1; 2003; 12Série1; 2004; 13
Série1; 2005; 44
Série1; 2006; 52
Série1; 2007; 65
Série1; 2008; 88
Série1; 2009; 97
Série1; 2010; 73
Série1; 2011; 133
Série1; 2012; 40
Qu
an
tid
ad
e
Ano
4.2.3 Relevant key-words
Were obtained 1775 key-words by the portfolio authors. In image 5 are described the
words with the most repetition that relate directly with intellectual capital, and also
validates the key-words adherence used in the selection of papers with the found papers.
Image 5 – Relation of key-words
Source: Authors (2012).
4.2.4 Relevant authors
It can be observed in image 6 the relation of the most highlighted authors in the
bibliographic portfolio. Altogether, the 674 papers with the portfolio subject were
elaborated by 1302 authors. It is observed that the most repeated is Bontis, N.
Image 6 – Relation of authors
Source: Authors (2012).
It was verified that some of the consagrated authors in this subject appear in the
selection of the porfolio’s papers, as in:
- Bontis, N: "Managing organizational knowledge by diagnosing intellectual
capital: Framing and advancing the state of the field. (1999)"; "Human capital and
organizational performance: A study of Egyptian software companies. (2007)";
"A causal model of human capital antecedents and consequents in the financial
services industry. (2009)"; "Positioning management accounting on the
intellectual capital agenda. (2007)"; "Intellectual capital disclosure payback.
(2011)"; "Intellectual capital and business performance in the Portuguese banking
industry. (2008)" "On the "essential condition" of intellectual capital: Labour!
(2006)"; "Managing risk with intellectual capital statements. (2007)"; "Global
ranking of knowledge management and intellectual capital academic journals.
(2008)"; "A scientometric analysis of knowledge management and intellectual
capital academic literature (1994-2008). (2010)"; "Practical relevance of
knowledge management and intellectual capital scholarly research: Books as
knowledge translation agents. (2011)"; "Intellectual capital and business
performance in the pharmaceutical sector of Jordan. (2010)"; "Managing
intellectual capital in Nigerian telecommunications companies. (2012)".
- Roos, G.: "Information needs of internal and external stakeholders and how to
respond: Reporting on operations and intellectual capital. (2007)"; "Intellectual
capital and performance indicators: Taiwanese healthcare sector. (2007)";
"Intellectual capitals, business models and performance measurements in forming
strategic network. (2011)"; "Intellectual capital: Origin and evolution. (2006)",
"Intellectual capital analysis as a strategic tool. (2002)"; "Towards improved
information disclosure on intellectual capital. (2000)".
- Edvinsson, L.: "Developing intellectual capital at Skandia. (1997)"; "Developing
a model for managing intellectual capital. (1996)"; "Intellectual capital: from
intangible assets to fitness landscapes. (2001)"; "National intellectual capital:
Comparison of the Nordic countries. (2008)".
- Johson, W. H. A.: "Integrative taxonomy of intellectual capital: Measuring the
stock and flow of intellectual capital components in the firm. (1999)".
- Stewart, T. A.: "Your Company most Valuable Asset - Intellectual Capital.
(1994)".
And appears a new term in Intellectual Capital: “Green”, facing environmental
matters, defined by Chen, Y. S., in works:
- Chen, Y. S.: "The determinants of green intellectual capital. (2012)"; "The
positive effect of green intellectual capital on competitive advantages of firms. (2008)";
"The influence of intellectual capital on new product development performance - The
manufacturing companies of Taiwan as an example. (2006)".
The “Green” Intellectual Capital, also known as Environmental Management
Intellectual Capital or Green Innovation was nominated by Yu-Shan Chen, assistant
professor of the National Taiwan University of Science and Technology, in 2008.
This new nomination appeared to raise a competitive advantage of enterprises
through environmental management or green innovation, widespread subject in today’s
world. Due to tendencies of international environmental regulations and awareness of
customers, states Chen (2008).
In this way, Dr. Chen found a gap of research, exploring Intellectual Capital about
the view of Environmental Management or “Green” Innovation in a way to bring
competitive advantage to enterprises.
Hence, “Green” Intellectual Capital was defined was defined as final stock of all
intangible assets, knowledge, capacity and relationship relations, regarding protection of
the environment and/or “green” innovation in an individual level or an inside the
enterprise level (CHEN, 2008).
4.2.5 Relevant Papers
Regarding the most relevant papers, the Intellectual Capital presented 275 papers with
citations of the bibliographic portfolio. Board 3 shows the relation of quantity of paper
citations in the Google Scholar higher than 100.
Board 3 – Relation of quantity of intellectual capital paper citation
INTELLECTUAL CAPITAL PAPERS
Nº
Citation
s
Social capital, intellectual capital, and the organizational advantage 7055
Intellectual Human Capital and the Birth of U.S. Biotechnology Enterprises 1768
The role of social and human capital among nascent entrepreneurs 1252
Developing intellectual capital at Skandia 788
The influence of intellectual capital on the types of innovative capabilities 662
Developing a model for managing intellectual capital 618
Managing organizational knowledge by diagnosing intellectual capital: Framing and
advancing the state of the field 595
Understanding knowledge sharing in virtual communities: An integration of social capital and
social cognitive theories 502
Integrating intellectual capital and knowledge management 453
Examining the Human Resource Architecture: The Relationships Among Human Capital,
Employment, and Human Resource Configurations 441
Applications of social capital in educational literature: A critical synthesis 374
Intellectual capital and the 'capable firm': Narrating, visualising and numbering for managing
knowledge 315
Intellectual Capital Profiles: An Examination of Investments and Returns 287
Social capital, knowledge, and the international growth of technology-based new firms 280
Harnessing the power of intellectual capital 277
Social capital, self-esteem, and use of online social network sites: A longitudinal analysis 248
Constructing intellectual capital statements 230
An empirical investigation of the relationship between intellectual capital and firm's market
value and financial performance 219
The environmental–social interface of sustainable development: capabilities, social capital,
institutions 180
Understanding adaptation: What can social capital offer assessments of adaptive capacity? 174
Knowledge management and intellectual capital - The new virtuous reality of competitiveness 167
Protecting intellectual capital in international alliances 167
Integrative taxonomy of intellectual capital: Measuring the stock and flow of intellectual
capital components in the firm 161
Civil society, social capital, and development: Dissection of a complex discourse 158
Academic careers, patents, and productivity: industry experience as scientific and technical
human capital 156
Valuing investments in intellectual capital 156
Measuring intellectual capital: Learning from financial history 153
An empirical investigation of annual reporting trends of intellectual capital in Sri Lanka 148
Disclosure of information on intellectual capital in Danish IPO prospectuses 133
he implications of socialization and integration in supply chain management 130
Social capital and entrepreneurial growth aspiration: a comparison of technology- and non-
technology-based nascent entrepreneurs 130
Experienced entrepreneurial founders, organizational capital, and venture capital funding 124
Intellectual capital disclosure and market capitalization 113
Managing knowledge and intellectual capital for improved organizational innovations in the
construction industry: An examination of critical success factors 108
The knowledge value chain: How intellectual capital impacts on business performance 108
Exploring the concept of intellectual capital (IC) 107
Intellectual capital analysis as a strategic tool 106
Intellectual capital and corporate value in an emerging economy: Empirical study of
Taiwanese manufacturers 105
Class matters: human and social capital in the entrepreneurial process 104
ICBS intellectual capital benchmarking systems 104
Proposing and testing an intellectual capital-based view of the firm 104
Creating supply chain relational capital: The impact of formal and informal socialization
processes 103
Prioritization of human capital measurement indicators using fuzzy AHP 103
Intellectual capital and performance in causal models. Evidence from the information
technology industry in Taiwan 101
Lifting the lid on the use of content analysis to investigate intellectual capital disclosures 100
Source: Authors (2012).
In the classification of academic relevance made under the optics of number of
citations of the selected portfolio papers the study that excelled was NAHAPIET, J., with
the work “Social capital, intellectual capital, and the organizational advantage”, obtaining
7055 citations. And the work of ZUCKER, L.; DARBY, M. with “Intellectual Human
Capital and the Birth of U.S. Biotechnology Enterprises”, with 1768 citations. “The role
of social and human capital among nascent entrepreneurs” from DAVIDSSON, P.,
obtained 1252 citations.
Image 7 presents the relation between the most relevant authors’ networks with
the papers from the bibliographic portfolio. And image 8 shows a network of correlation
of authors versus co-authors of the bibliographic portfolio papers. Each circle corresponds
to an old portfolio, and their size is proportional to their size. The arrows indicate when a
paper is cited by another author and are faced from the paper that cited to the cited paper.
Even with the indication of the articles on the map in a certain illegal way, it is observed
that an intense connection between the portfolio papers. Hence, the most recent authors
have cited older authors, what demonstrates being a science field that is expanding.
Image 8 – Correlation between the authors versus co-authors of the bibliographic portfolio papers grid
Source: Authors (2012).
5. Final Considerations
The objective of this study focused in presenting a meta-review (bibliometric analysis) of
the literature about intellectual capital.
The paper is divided in two parts: the portfolio construction and the bibliometric analysis.
The construction of the portfolio had as objective selecting the most relevant papers on
the subject in matter. Being that, the bibliographic analysis sought to ascertain the main
papers, authors, journals and key words published from 1980 to 2012.
The portfolio construction process has made possible an analysis of 2260 papers,
culminating with a final portfolio of 674 papers aligned with the subject.
The bibliometric analysis showed that the main journals that approach and publish about
the subject are Journal of Intellectual Capital, with 134 papers. Followed by Journal of
Learning and Intellectual Capital, with 33 papers.
As for the key words, the most highlighted one was Intellectual Capital itself, appearing
with 400 repetitions.
The focused authors in this research were Bontis, N.; Roos, G.; Edvinsson, L.; Johnson,
W. H. A.; Stewart, T. A.; Chen, Y. S.; with works about intellectual capital, intangible
assets and green intellectual capital.
In the classification of academic relevance made under the optics regarding the number
of citations of the selected papers in the portfolio, the main work was from Nahapiet, J.,
with the work “Social capital, intellectual capital, and the organizational advantage”,
which obtained 7055 citations. In addition, the work of Zucker, L. and Darby M. with
“Intellectual Human Capital and the Birth of U.S. Biotechnology Enterprises”, with 1768
citations. Also, “The role of social and human capital among nascent entrepreneurs” from
Davidsson, P. with 1252 citations.
Hence, the research questions – “How to build the demanded knowledge for a researcher
when in the beginning of a research in the intellectual capital subject in order to provide
the necessary conditions to, in a second moment, seek opportunities to contribute in the
chosen thematic?” – was answered through section four.
In this way, under the importance in the development of academic researches around
intellectual capital, the objective of this analysis was centred in presenting today’s
situation of the literature.
With originality and value, this paper presents a evolution of studies about concept of
intellectual capital on literature review on this topic that has previously been published in
academic journals.
The limitations of this research were: i) delimitation on the sample field, for in his work
were used only three data bases; ii) usage of international works only; iii) only journals
were used, were not considered theses, dissertations, monographs, congresses or books;
iv) absence of an empirical research. Based on Serenjo, Bontis and Hull (2011), even if
the practitioners of the subject are actively involved in the field development, the total
contribution for the body of knowledge has decreased gradually.
Finally, as recommendations for future researches is recommended: i) the usage of more
data bases from the Capes portal; ii) considering national data bases; iii) considering other
works like theses, dissertations, books and scientific congresses; and, iv) making of
empirical research based on the construct of intellectual capital and research
opportunities.
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