Sources of Innovation and Innovation Type: Firm-Level Evidence From The United States
Sources of Innovation and Innovation Type: Firm-Level Evidence From The United States
Sources of Innovation and Innovation Type: Firm-Level Evidence From The United States
net/publication/345499344
Sources of innovation and innovation type: firm-level evidence from the United States
Article in Industrial and Corporate Change · December 2019
DOI: 10.1093/icc/dtz010
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Abstract
Only a handful of studies on innovation empirically analyze the links between firm innovation and the sources of
that innovative activity of sources of innovation on types of innovation. To fill this gap in the literature, this study
provides one of the first tests to identify how important sources of new information (suppliers, customers, other
business people in the industry, workers, and university) are associated with types of innovations (product, process,
and marketing). Data come from the 2014 National Survey of Business Competitiveness sponsored by the Economic
Research Service at the United States Department of Agriculture (n¼10,952). The results show that innovation ideas
emanating from customers, workers, and universities are positively associated with all types of innovations,
suggesting that these sources are critical for developing different types of innovation. In particular, universities as a
source of innovation activity are especially important. In contrast, other sources, such as suppliers and people in
industry do not seem to be as important as a source of innovation. JEL classification: C18, C21, L10, O10, O30, O31,
O32
1. Introduction
Innovation is one of the most discussed topics in the fields of business, economics, and management studies. Innovation can
help an organization to adapt to the environment, survive, and grow (Burns and Stalker, 1961; Thompson, 2010), enhance
economic growth and performance (Carlino, 2001; Verspagen, 2006), narrow the gap in productivity and economic
conditions for less successful countries (Fagerberg and Godinho, 2006), increase competitiveness (Cantwell, 2006), raising
living standards and prosperity of citizens (Aboal and Tacsir, 2018; Breznitz et al., 2018: 883), help to reduce unemployment
(Pianta, 2006), and help to deal with grand challenges such as poverty, climate change, and health (Kattel and Mazzucato,
2018; Mazzucato, 2018). Overall, innovation is a driving force of firm productivity (Stojcic and Hashi, 2014) and “central to
the growth of output and productivity” of firms and nations (OECD/Eurostat, 2005: 10; see also –>Leyden and Link, 1992;
Link and Siegel, 2007; Acs et al., 2017).
VC The Author(s) 2019. Published by Oxford University Press on behalf of Associazione ICC. All rights reserved.
1366 M. A. Demircioglu et al.
Studies of innovation are roughly divided into two types. First, many studies treat innovation as a dependent variable, so
they have examined factors affecting innovation such as determinants or conditions of innovations (e.g. Mohr, 1969;
Kimberly and Evanisko, 1981; Damanpour, 1991; Greenhalgh et al., 2004; Torugsa and Arundel, 2016a; Demircioglu and
Audretsch, 2017a). The second type of study considers innovation as an independent variable, and examines the outcomes of
innovation, such as how innovation influences efficiency, increases performance, improves the quality of services, and even
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increases the legitimacy of organizations (Damanpour et al., 2009; Griffith et al., 2006; Verhoest et al., 2007; Brown and
Osborne, 2012; Ballot et al., 2015). This article uses the first approach and treats innovation as the dependent variable while
analyzing how different sources associated with overall firm innovation activity and four types of innovations.
The magnitude and breadth of the literature on innovation and particularly sources of innovation reflects its importance.
The famous conclusion attributed to Solow that innovation “falls like manna from heaven” ( Aghion and Howitt, 1998;
Link, 2013), may in fact ignore that innovation activity emanates from more earthly sources. Analyzing two types of
knowledge spillovers—Marshall-Arrow-Romer (MAR) and Carlino (2001) point out that analyzing different sources of
innovation goes back to 1890 when Alfred Marshall developed a theory on knowledge and innovation externalities. For
instance, Nakamura (2000) explains how workers have been a key source of creativity and innovations for the last century.
Additionally, research facilities and universities provide a source of knowledge and ideas underlying the development of
many product and service innovations (Carlino, 2001). Thus, innovation sources are a crucial factor for innovation activities
and different sources of innovation may result in different types of innovations.
Despite its central importance, there is only a paucity of studies actually attempting to uncover what exactly are the most
important sources of innovation as well as their impacts on overall innovation activity and the various dimensions and
manifestations of innovation. The handful of empirical studies found in the literature are typically restricted to descriptive,
conceptual, qualitative analysis, or based on case studies (e.g. Borins, 2002; OECD, 2009; Birkland, 2011; Nasi et al.,
2015; Bankins et al., 2017). This paucity of quantitative studies identifying and analyzing sources of new information and
knowledge driving innovation activity limits both the ability of scholars to not only understand the innovation process but
also thought leaders to formulate effective policies and strategies in policy and business. The purpose of this article is to
make a least a start toward filling this gaping gap in the literature by analyzing how particular sources of knowledge impact
both overall innovation activity as well as specific manifestations of innovation output. In particular, this article seeks to
analyze how the important sources of knowledge, such as suppliers, customers, other people in industry, workers, and
universities, are associated with specific types of innovations, namely, product, process, and marketing innovations. To
address these questions, we analyze which particular knowledge sources generate particular types of innovations and
overall innovation activity using quantitative methods.
The second important contribution of this study is to compare three distinct types of innovation—product, process, and
marketing innovations, instead of just focusing on a grossly simplistic conceptual and aggregate measurement of innovation
(e.g. whether innovation occurs or not). Despite difficulties in quantifying and measuring innovation activity, it is possible
to measure different types of innovations (OECD/Eurostat, 2005, 2018; Smith, 2006; Bloch and Bugge, 2013; Bugge and
Bloch, 2016; Demircioglu and Audretsch, 2018; Gault, 2018). Most of the extant research typically measures aggregated
innovation activity by patents, as an outcome variable (e.g. Arundel and Kabla, 1998; Arundel, 2001). However, patents as
an output does not capture many innovations. For instance, Arundel and Kabla (1998: 138) state that “Patents are a
particularly poor measure of innovativeness in sectors such as food and tobacco, petroleum refining, basic metals,
automobiles, and other transport equipment. In these sectors, the large majority of innovations are not patented.” In fact,
many innovations which are not patented (or aimed to be patented) are measured using the large dataset introduced in this
article and explained below.
Additionally, three specific types of innovation exhibit different characteristics from each other and may emanate from
distinct sources of knowledge. For example the knowledge sources underlying marketing innovations may be different than
their counterparts for process innovations [see statistical results from the Policies, Appropriation, and Competitiveness in
Europe (PACE), Service des Statistiques Industrielles (Statistical Service of the French Ministry of Industry; SESSI),
Community Innovation Surveys (CIS), and Terjesen and Patel, 2017]. Thus, it makes sense to analyze these three types of
innovations differently. For instance, the 1993 CIS survey showed that process innovation was about 25%, which was lower
than product innovation (35.9%; Arundel and Kabla, 1998).
The third important contribution to the literature from this article is the unique and representative dataset for the US data
that are analyzed. Despite the high propensity for innovation activity to spatially cluster within close geographic proximity to
the knowledge source, resulting in notable innovative clusters, such as Silicon Valley, no systematic, comprehensive, and
large-scale survey on innovation activity had been created for the United States spanning the entire economy. In contrast,
Sources of innovation and innovation type 1367
Europe has devoted considerable resources and effort in creating and analyzing systematic and comprehensive measurement
of innovation activity. Most prominently are the Oslo Manuals, the European Union’s Community Innovation Surveys (CIS)
conducted in different European countries, the Maastricht Economic and Social Research Institute on Innovation and
Technology (MERIT), MEPIN, and SESSI, resulting in a number of important and influential scholarly and policy
publications (e.g. Arundel and Kabla, 1998; Arundel, 2001; Arundel and Geuna, 2004; OECD/ Eurostat, 2005, 2018; Frenz
and Ietto-Gillies, 2009; Battisti and Stoneman, 2010; Bloch and Bugge, 2013).
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The limited datasets measuring innovation in the United States (e.g. National Science Foundation’s Survey of Industrial
Research and Development, CompuStat, and 1994 Carnegie Mellon University survey of manufacturing innovation) suffer
in that they are neither comprehensive nor representative of American companies, and do not reflect the diverse and
heterogeneous nature of both knowledge sources or types of innovations (Cooper and Merrill, 1997). Data limitations have
restricted the ability of scholars to undertake comprehensive and wide-ranging studies on innovation in the context of the
United States. Thus, an additional key contribution of this study is to provide one of the first comprehensive, representative,
and systematic analyses of innovation in the context of the United States by using the National Survey of Business
Competitiveness (NSBC) data.
In particular, the novel contribution of this article to the literature is to compare three different types of innovations
(product, process, and marketing) to show how five important knowledge sources (suppliers, customers, other people in
industry, workers, and universities) are associated with these three innovation types as well as overall firm innovation
activity differently. The main research question of this article thus is how do important sources of knowledge are associated
with main innovation types and overall innovation activity? There are two sub-research questions in this study. First, how
do suppliers, customers, and other business people in the industry, workers, and university as sources of innovation
contribute to product, process, and marketing innovations? Second, how do these knowledge sources contribute to the
overall firm innovation activity (the aggregate of all types of innovations)? This article is organized as follows. The
following section will explain and discuss sources and types of innovations. Part three will introduce and explain the
important and novel data used in this study along with the methodology. The results of this study will be discussed in
Section 4. This article ends with a discussion, limitations, and conclusion.
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million), suggesting that the number of workers involved in creative and innovation activities continues to increase
(Nakamura, 2000).
Additionally, Arundel and Geuna (2004) summarized many studies on innovation and patent applications and found that
in both North America and Western Europe, knowledge and ideas emanating from universities and research institutions
increase the quality and quantity of innovations. When firms are located far away from universities and R&D laboratories,
firm-university interactions are less frequent, and firms may receive fewer ideas, ultimately reducing their innovation
activity (Adams, 2001). In a recent study, Richardson et al. (2016: 132) find that “both scholars and public policy makers
have viewed investment in university research as a key component to generating innovation activity.” Thus, the effects of
universities on types of innovation and overall innovations are vital to analyze. As Audretsch and Stephan (1996) find,
“companies can also learn about the research occurring in university labs through social contacts between employees and
university scientists and by sending employees to participate in workshops and seminars at the university” (Audretsch and
Stephan, 1996: 646). Furthermore, Demircioglu and Audretsch (2017b) find that ideas emanating from universities are
positively associated with the quality of public services, employee job satisfaction, and interagency collaboration. Thus, we
expect that ideas emanating from workers and universities are positively associated with types and overall innovations and
the association is statistically significant and meaningful.
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the creation of online stores, even while retail companies continue doing their regular business at their psychical location,
such as Amazon.com’s “one-click” ordering process at online (Chen, 2006).
1 “The confidentiality of the Rural Establishment Innovation Survey data is protected under the statutes of US Code Title
18, Section 1905, US Code Title 7, Section 2276, and Title V of the E-Government Act, Confidential Information
Protection and Statistical Efficiency Act of 2002 (CIPSEA; Public Law 107-347). A full statement is provided in mail
questionnaires and web surveys confirming that answers to the survey will be kept confidential, and that under no
circumstances will identifying information about individuals or their organizations be released to any unauthorized
individuals, agencies, or institutions. It will assure respondents that only aggregated statistics will be reported, and
that providing answers to any or all questions is strictly voluntary. Detailed disclosures regarding confidentiality will
be provided in an advance letter to respondents (see Attachment D), and enumerators will check to ensure that
respondents have received and read the letter and disclosures prior to conducting the survey. Economic Research
Service will use established procedures for survey storage and disposal to ensure that individual identifiers are
protected from disclosure. ERS will also use statistical disclosure limitation methods to ensure that individual
identifying information does not appear in any public data product” (United States Department of Agriculture, 2014,
Part A: 14).
1370 M. A. Demircioglu et al.
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Marketing innovation 0.46 0.50 0 1
Source 1: Suppliers 2.26 0.64 1 3
Source 2: Customers 2.40 0.64 1 3
Source 3: Others in industry 2.38 0.63 1 3
Source 4: Workers 2.35 0.63 1 3
Source 5: Universities 1.55 0.65 1 3
Establishment yearsa 9.22 3.32 1 14
Number of employeesb 8.33 4.11 1 15
Rurality index (Beale13) 4.87 2.28 1 9
Industry Classification (Naics2)
21: Mining 0.26 0.16 0 1
31: Food manufacturing 0.08 0.27 0 1
32: Wood, paper manufacturing 0.13 0.33 0 1
33: Metal, machinery, electronic, hardware 0.21 0.40 0 1
42: Wholesale trade 0.20 0.40 0 1
48: Transportation 0.06 0.24 0 1
51: Information 0.07 0.25 0 1
52: Finance and insurance 0.02 0.15 0 1
54: Professional 0.17 0.37 0 1
55: Management of companies 0.02 0.15 0 1
71: Arts, entertainment 0.02 0.14 0 1
n ¼ 4845
a
Years categories: 1800–1871¼1, 18721896¼2, 1897–1921¼3, 1922–1946¼4, 1947–1962¼5, 1963–1972¼6, 1973–1977¼7, 1978–1982¼8, 1983– 1987¼9, 1988–1992¼10,
1993–1997¼11, 1998–2002¼12, 2003–2007¼13, 2008–2012¼14.
b
Employment categories: Between 1 and 4 employees¼1, 5¼2, 6¼3, 7¼4, 8¼5, 9¼6, 10¼7, 11–12¼8, 1–15¼9 16–19¼10 20–29¼11, 30–49¼12, 50– 99¼13, 100–249¼14,
250–499¼15, 500–14,000¼15.
so they have a very limited focus. NSBC, on the other hand, is very unique in its broad representation. This project is
consistent with the White House’s emphasis on innovation. For instance, President Obama’s 2011 State of the Union
focused on innovation in America, including both urban and rural areas, as they key to national prosperity in the United
States (USDA, no date, Part A).
item reflects marketing innovations. Finally, the last dependent variable is firm innovation activity, which includes all six
indicators (including product, process, and marketing innovation).
3.3 Independent variables
Five main sources of knowledge, or innovation sources are used as independent variables. Important sources or new
information identified by the National Survey of Business Competitiveness (2014) are: (i) suppliers, (ii) customers, (iii) other
people in industry, (iv) workers, and (v) universities. Respondents were asked to evaluate how those sources of new
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information are valuable for the firm. The response categories are “not at all valuable,” “somewhat valuable,” and “very
valuable.” These identified sources are mostly consistent with Australian Public Service Commission’s 2011 data which
important sources are identified (APSC, 2011), Borins’s analysis of sources of innovation (2011), the Oslo Manual (2018),
and Terjesen and Patels’ research on process innovations (2017).
3.5 Estimation
As explained in the above section, the set of dependent variables reflects the type of innovation, namely product, process,
and marketing innovation. Because these three dependent variables are correlated with each other (error terms are
correlated), using ordinary least square (OLS) or ordinal logit models cause inefficient results, since the latter models
assume that the errors are not correlated with each other (Zellner, 1962; Fiebig, 2001; Martin and Smith, 2005). For
instance, the correlation between product and process innovation is 0.56, the correlation between product and marketing
innovation is 0.43, and the correlation between process and marketing innovation is 0.8, indicating that the errors are
somewhat correlated. To compensate for this problem, seemingly unrelated regressions (SUR) are used ( Zellner, 1962;
Fiebig, 2001; Martin and Smith, 2005). Stata software program can provide results of the SUR precisely and efficiently.
OLS is used for the fourth and last dependent variable—overall firm innovation activity as this variable is a summated scale
of six indicators. The next section will report and summarize the results.
4. Results
Table 1 reports the descriptive statistics. On average, 58% of companies reported to have implemented product innovation,
46% of companies reported to have implemented marketing innovation, and 45% of companies reported to have
implemented process innovation. The highest mean value of the knowledge sources is customers, suggesting that customers
involve many of the innovation activities. There is considerable variance in establishment year in the survey, so both very
new and old firms exist, which also confirms the representativeness of the survey. Results of
1372 M. A. Demircioglu et al.
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Source 5: Universities 0.074*** 0.076*** 0.096*** 0.082***
Establishment years 0.010*** 0.009*** 0.010*** 0.010***
Number of employees 0.010*** 0.015*** 0.018*** 0.014***
Rurality index (Beale13) 0.009*** 0.009*** 0.011*** 0.010***
Industry classification (Naics2)Base: 21: mining
31: Food manufacturing 0.194*** 0.098** 0.037 0.110**
32: Wood, paper manufacturing 0.133*** 0.067 0.025 0.075*
33: Metal, machinery, electronic, hardware 0.239*** 0.117*** 0.089* 0.149***
42: Wholesale trade 0.140*** 0.080* 0.121** 0.113***
48: Transportation 0.052 0.015 0.001 0.022
51: Information 0.306*** 0.175*** 0.183*** 0.221***
52: Finance and insurance 0.176*** 0.087 0.216*** 0.160***
54: Professional 0.125*** 0.048 0.117* 0.096**
55: Management of companies 0.071 0.016 0.065 0.04
71: Arts, entertainment 0.283*** 0.098* 0.166* 0.183***
Constant 0.102 0.237*** 0.319*** 0.219***
R2 0.11 0.1 0.08 0.12
*P<0.05; **P<0.01; ***P<0.001; n¼4845.
the industry classification (Naics2) show that most of the firms in the sample are in the following two-digit sectors: 21:
mining, 33: metal, machinery, electronic, and hardware, and 42: wholesale trade, followed by 54: professional jobs and 32:
wood and paper manufacturing.
Table 2 reports the results of the unstandardized SUR models. Accordingly, ideas emanating from customers, workers,
and universities are positively associated with all types of innovations (P<0.001). For instance, ideas emanating from
customers are positively associated with namely product (B¼0.06, P<0.001), process (B¼0.05, P<0.001), and marketing
innovations (B¼0.05, P<0.001), holding other variables constant. Ideas emanating from suppliers are moderately and
positively associated with only product innovation (B¼0.02, P<0.05), but suppliers do not have any statistical relationship to
other types of innovations. Ideas emanating from other business people in the firm’s industry are positively associated with
process and marketing innovations (P<0.05), holding other variables constant, although the magnitude of the effect is small.
Ideas emanating from workers are positively associated with all types of innovations (product, process, and marketing),
holding other variables constant (B¼0.04, 0.05, and 0.05, respectively; P<0.001). Finally, the universities as sources of
innovation are also positively and statistically associated with both types of innovations ( P<0.001). In fact, the university as
a source of innovation has higher coefficients (B¼0.07, 0.08, and 0.1, respectively), suggesting that universities are
important sources of innovation.
Regarding the control variables, on average, the younger firms, firms with more employees, and firms located in urban
areas exhibit a greater degree of innovation activity for all types of innovations—product, process, and marketing
innovations. All of these results are statistically significant at the 0.01% level. In addition, compared with other industry
types, companies in information (Naics¼51), metal, machinery, electronic, hardware (Naics¼33), and arts and
entertainment (Naics¼71) are more innovative than are other companies. Moreover, on average, companies tend to generate
more product innovations compared with process innovations. Finally, the results show that transportation firms and
management of companies do not exhibit a significant amount of innovation activity suggesting that the particular type of
organization matters for innovation.
1374 M. A. Demircioglu et al.
5. Discussion
Innovation, which is one of the most important topics in the studies of business, economics, and management can contribute
to organizational performance, in that is conducive to organizational survival, success such as increasing competitiveness,
productivity, and performance (e.g. Burns and Stalker, 1961; OECD/Eurostat, 2005, 2018; Pianta, 2006; Damanpour et al.,
2009; Frenz and Ietto-Gillies, 2009; Thompson, 2010; Stojcic and Hashi, 2014; Demircioglu and Audretsch, 2017a; Wojan
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et al., 2018). The extent, scale, and scope of the studies on innovation and innovation activities reflect the prominence of
innovation (e.g. Mohr, 1969; Kimberly and Evanisko, 1981; Damanpour, 1991; Greenhalgh et al., 2004; Smith, 2006;
Ballot et al., 2015; Torugsa and Arundel, 2016a, 2016b; – >Demircioglu and Audretsch, 2018; Kattel and Mazzucato,
2018; Mazzucato, 2018). Analyzing how five important sources of innovation (i.e. suppliers, customers, others in industry,
workers, and university) are associated with types of innovation (i.e. product, process, and marketing), we have found that
universities, workers, and customers are important sources of innovation positively associated with all of innovation types.
This article has made several unique and important contributions that are discussed in below.
This main focus of this article is sources of innovation. Although identifying sources of innovation goes back to the late
19th century (Carlino, 2001), testing for the effects of different knowledge sources and relating them to different outcomes
is a relatively recent topic. Using ideas from different knowledge sources are crucial for generating different types of
innovations and outcomes (Audretsch and Stephan, 1996; Arundel and Geuna, 2004; Frenz and Ietto-Gillies, 2009).
Terjesen and Patel (2017: 1422) suggest that organizational managers must recognize and take advantage of ideas
emanating from a broad spectrum of knowledge sources (e.g. universities) because “this knowledge is subsequently stored
in the organization’s memory (i.e., equipment, systems, procedures, routines, and managers) and becomes ‘organizational
knowledge’ that can be harnessed to enhance a firm’s innovation activities... [which are] imperative to innovation.” The
empirical results of this article show that particular knowledge, such as customers, workers, and universities can enable
firms to generate product, process, and marking innovations. Knowledge and ideas emanating from customers positively
associated all types of innovation, which is consistent with the hypothesis that feedback and ideas generated by customers
enable organizations to become more innovative.
While workers provide internal sources of knowledge within the organization or firm, universities and customers
provide external sources of innovations. The results imply that both internal and external sources are necessary to develop
different types of innovations. Moreover, as the positive and statistically significant coefficients of variables measuring
universities and workers indicate, the results support the view that universities and workers are key sources of ideas and
innovations. This is particularly important from the perspective of organizational managers, who should encourage their
workers to express their views and facilitate their feedback to enhance innovation activity. Future studies may focus on
analyzing how workers in the organizational context of universities specifically influence different types of innovations.
In addition, rather than focusing only on a sole type of innovation or aggregated innovation activity, the present study
provides and compares across three different types of innovations—product, process, and marketing innovations.
Distinguishing among product, process, and marketing innovations is essential because each type of innovation has distinct
and different characteristics (e.g. process innovations are less tangible), may be influenced by different knowledge sources
(e.g. different external sources are associated with different types of innovations differently), may require different
resources (e.g. process innovations may be more costly in terms of monetary sources), and may lead to different
organizational outcomes (e.g. product innovations may lead to patents compared with other types of innovations; Fritsch
and Meschede, 2001; OECD/Eurostat, 2005, 2018; Chen, 2006; Naidoo, 2010; Stojcic and Hashi, 2014; Radicic et al.,
2016; Terjesen and Patel, 2017; Van der Wal, 2017; Gault, 2018). The results of this study suggest that different types of
knowledge sources are associated with distinct types of innovations differently. Therefore, future studies would be wise to
extend and build on this study by comparing different types of innovations.
Moreover, this study uses a recent (2014), comprehensive (both rural and urban area with almost all states in the United
States), and large-scale survey (n¼10,952 firms) on firm innovation in the United States. Despite many
Sources of innovation and innovation type 1375
datasets in Europe [e.g. Community Innovation Surveys (CIS)], fewer datasets on firms’ innovation activities are available
for the United States. This is unfortunate because many large and innovative companies such as Apple, Uber, Amazon,
Netflix, and Microsoft are located in the United States. Furthermore, the United States ranks among the large advanced
countries in the world, with a population of over 320 million. Therefore, a key contribution of this study is analyzing survey
responses from the National Survey of Business Competitiveness (NSBC) which is sponsored by the United States
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Department of Agriculture. The findings provide interesting results, such as the more robust innovation activity exhibited
by firms in the urban areas, but also both the extent and heterogeneity of innovation activity exhibited by firms in rural
areas. This article also shows that on average, certain types of industries (e.g. IT, metal, machinery, electronic, and arts) are
more innovative than other industries. Additionally, both firm age and size are positively associated with innovation types.
All of these findings made possible by analyzing these new and unique data provide insights that will be instructive and
enlightening for decision makers in both business and policy.
Several important limitations inherent in this study need to be emphasized. Like most of survey research, this article is
based on a cross-sectional data (United States Department of Agriculture (USDA), Economic Research Service, 2014).
Therefore, lack of panel data, or quasi-experimental design does not permit scholars to make causal claims about findings.
In other words, the study is correlational, not causal. In addition, due to data limitations, we could not measure which
particular innovations are more important and effective than others. For example, data does not provide information about
the quality of innovations such as which innovations lead huge savings, sales, or patents. Similarly, the outcomes variables
are only probably to innovate in a given, so the outcome is same if a given firm introduces only one innovation versus five
innovations in the previous three years. This limitation (both quality—the significance of innovation—and the quantity—
the number of innovations–) was also acknowledged from the USDA as it was stated as “a noted weaknesses of this set of
questions is their inability to differentiate highly innovative from nominally innovative establishments” (USDA, Part A: 4).
Thus, future research may focus on the quality and quantity of innovation with using more questionnaires. Future research
may also use qualitative methods (e.g. cases, in-depth interviews, and ethnographic research) to examine how and why
certain sources of innovative ideas lead major innovations because qualitative research are important to explain how and
why a particular relationship occurs, not occurs, or occur in different intensity (Corbin and Strauss, 2008; Maxwell, 2012;
Bryman, 2016).
Despite the limitations of this study, it offers insights and practical implications about how sources of innovations are
associated with types of innovations, the importance of workers, customers, and universities as innovation sources, the
importance of product, process, and marketing innovations. We recommend future studies to focus on the link of sources
and types of innovation in other context with qualitative research. Future research may also focus on how and why
universities, customers, and employees influence innovation activities and benefits of innovations (e.g. whether innovation
from particular sources reduces cost and increases quality of produce and services) in public, nonprofit, and private settings.
Future research may also explore the effects of other sources of knowledge such as the Federal government’s role for
innovation activities of companies and public organizations.
6. Conclusion
Innovation has emerged not just as an important force driving the performance of firms and other organizations, but also
entire regions and countries. Despite its prominence, there are not many quantitative studies analyzing how different
knowledge sources are associated with different types of innovations as well as overall innovation activity. Using United
States National Survey of Business Competitiveness (NSBC) conducted in 2014, this study has contributed to the
innovation literature by analyzing how the following knowledge sources are associated with product, process, and
marketing innovation as well as overall innovation activity by the following important innovation sources: (i) suppliers, (ii)
customers, (iii) other people in industry, (iv) workers, and (v) university. The most important findings of this article are that
universities, customers, and workers are crucial knowledge sources, positively associated with product, process, marketing,
and overall innovation activity. Suppliers and others in industry have either little or no statistical effect for innovation
activities.
Just as knowledge sources are heterogeneous, so too are the manifestations of innovation activity highly heterogeneous.
Yet, the literature on innovation activity has generally ignored the heterogeneity inherent in both knowledge sources and
manifestations of innovation. If there is an innovation, there should be a knowledge source(s), other than the skies to which
Solow eluded driving innovation activity. Our study is original and important to the literature as it has found that
universities, workers, and customers are crucial sources for innovations. With using qualitative or quantitative research,
future studies may analyze other sources (e.g. governments’ role for innovation), other types of innovations (e.g.
1376 M. A. Demircioglu et al.
organizational), or the benefits of innovation (e.g. whether a particular innovation increases efficiency) in other context both
in terms of different region (e.g. in Asia) and in different sector (e.g. public and nonprofit).
Acknowledgment
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We appreciate the helpful comments and suggestions of Barry M. Rubin (Indiana University-Bloomington), Chantalle LaFontant (Indiana
University-Bloomingon), Stephan Goetz (Pennsylvania State University), and Tim Mulcahy (National Opinion Research Center) along with
the Editors and anonymous reviewers in this journal. In particular, we have received excellent feedback and help from Timothy R. Wojan,
who is a Senior Economist at the Economic Research Service/USDA ever since we started the project. The authors are responsible for any
remaining errors.
Funding
This research was supported in part by the intramural research program of the U.S. Department of Agriculture, Economic Research Service.
Extramural funding for this research provided by the Economic Research Service was through USDA/REE Cooperative Agreement 58-
6000-5-0095, administered by the Northeast Regional Center for Rural Development (NERCRD). The research for this paper was also
financially supported by National University of Singapore (NUS) (Grant No. R-603-000-270-133) and Indiana Business Research Center
(IBRC) at Indiana University-Bloomington. The views expressed are those of the authors and should not be attributed to the Economic
Research Service, the USDA, NERCRD, NUS, or IBRC.
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Appendix 1
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Table A2. Correlations
7: Urban population of 2500 to 19,999, not adjacent to a metro area
18: Completely
2 rural 3or less than
4 2500 urban5 population,
6 adjacent
7 to a metro
8 area 9 10 11
9: Completely rural or less than 2500 urban population, not adjacent to a metro area
1 Establishment years
Product innovation 1800–1871
1 ¼ 1, 1872–1896¼ 2, 1897–1921¼ 3, 1922–1946¼ 4, 1947–1962¼ 5, 1963–
1972¼ 6, 1973–1977¼ 7, 1978–1982¼ 8, 1983–1987¼ 9, 1988–1992¼ 10, 1993–
2 Process innovation 1997¼ 11,1 1998–2002¼ 12, 2003–2007¼ 13, 2008–2012¼ 14
0.56
Employment categories Between 1–4 employees ¼ 1, 5 ¼ 2, 6 ¼ 3, 7 ¼ 4, 8 ¼ 5, 9 ¼ 6, 10 ¼ 7, 11–12 ¼ 8, 13–
3 Marketing innovation 15¼ 9, 16–19¼
0.43 0.80 10, 20–29
1 ¼ 11, 30–49¼ 12, 50–99 ¼ 13, 100–249¼ 14,250–
499¼ 15, Over500¼ 15.
4 Industry classification
Source 1: Suppliers(Naics2) 21:
0.09Mining,31 ¼ Food 0.07
0.09 manufacturing,
1 32¼ Wood and paper manufacturing,
33¼ Metal, machinery, electronic, and hardware manufacturing,¼42 Wholesale
trade, 48¼ Transportation, 51¼ Information, 52¼ Finance and insurance,
5 Source 2: Customers 0.15 0.16 0.12 0.28 1
54¼ Professional, 55¼ Management of companies, 71 ¼ Arts and entertainment.
6 Source 3: Others in industry 0.04 0.09 0.10 0.20 0.20 1
9 Establishment years 0.05 0.04 0.03 0.01 0.06 0.03 0.02 0.07 1
10 Number of employees 0.12 0.17 0.14 0.04 0.07 0.01 0.02 0.08 0.16 1
11 Rurality index (Beale13) 0.07 0.07 0.07 0.02 0.07 0.00 0.02 0.06 0.11 0.05 1
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