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Autor
McPhillips Marita (Gdansk University of Technology)
Tytuł
Innovation by Proxy : Clusters as Ecosystems Facilitating Open Innovation
Źródło
Journal of Entrepreneurship, Management and Innovation (JEMI), 2020, vol. 16, nr 3, s. 101-128, tab., bibliogr. s. 120-127
Tytuł własny numeru
Proximity and Innovation in Clusters: How Close, How Far?
Słowa kluczowe
Klastry, Otwarte innowacje, Innowacyjne sieci współpracy, Polityka innowacyjna
Business cluster, Open innovation, Collaborative Innovation Networks (COINs), Innovation policy
Uwagi
Klasyfikacja JEL: L52, M29, O25, O31, O32, O33, R58
streszcz., summ.
Abstrakt
Otwarte innowacje to koncepcja, której cechy można postrzegać jako naturalnie łączące się z opartą na bliskości charakterystyką klastrów. Celem tego artykułu było zbadanie potencjalnej roli klastrów jako pośredników otwartych innowacji dla swoich członków. Przeprowadzono przegląd literatury i badanie eksploracyjne, w tym pogłębione wywiady z ekspertami w dziedzinach innowacji i klastrów w Polsce. W artykule dokonano połączenia koncepcji otwartych innowacji i klastrów, zaproponowano i skategoryzowano role klastrów jako pośredników otwartych innowacji, a także wskazano czynniki, które mogą mieć wpływ na pomyślne przyjęcie tej roli. Ponadto wykazano, że klastry mogą nie tylko zarządzać i pośredniczyć w kontaktach wewnątrz sieci członków, ale także kształtować i współtworzyć szerszy otwarty ekosystem innowacji. Wyniki badania przyczyniają się do kompleksowego zrozumienia potencjalnych ról pośredników otwartych innowacji w odniesieniu do klastrów w kontekście kraju w trakcie transformacji gospodarczej. Ponieważ klastry odgrywają rolę pośrednika otwartych innowacji, wsparcie publiczne tej roli może zwiększyć otwartość na współpracę nie tylko firm członkowskich, ale wszystkich uczestników regionalnego ekosystemu innowacji. (abstrakt oryginalny)

Open innovation is a concept, whose attributes can be perceived as naturally complementing the proximity-based offer of clusters. The purpose of this paper is to investigate the potential role of clusters as intermediaries of open innovation for cluster members. A literature review and an exploratory study were performed, involving in-depth interviews with experts in the field of innovation and clusters in Poland. This article conceptually links open innovation and clusters, proposes and categorizes roles of clusters as open innovation intermediaries, as well as indicates factors that might affect the successful adoption of this role. Furthermore, it points out that clusters could not only manage and mediate their network of members but also shape and co-create a broader open innovation ecosystem. The findings contribute to a comprehensive understanding of the potential roles of open innovation intermediaries in regard to clusters in the context of transitioning economies. With clusters playing the role of an open innovation intermediary, public support at cluster level could increase the openness to cooperation not only for member companies but all participants in the regional innovation ecosystem. (original abstract)
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  1. Agogue, M., Berthet, E., Fredberg, T., Le Masson, P., Segrestin, B., Stoetzel, M., Wiener, M., and Yström, A. (2017). Explicating the role of innovation intermediaries in the "unknown": A  contingency approach. Journal of Strategy and Management, 10(1), 19-39. https://doi.org/10.1108/JSMA-01-2015-0005
  2. Bahlmann, M. D., & Huysman, M. H. (2008). The emergence of a knowledge-based view of clusters and its implications for cluster governance. The Information Society, 24(5), 304-318. https://doi.org/10.1080/01972240802356075
  3. Bell, M. (2009). Innovation capabilities and directions of development. STEPS Working Paper 33. Brighton: STEPS Centre. https://opendocs.ids.ac.uk/opendocs/handle/20.500.12413/2457
  4. Bembenek, B. (2017). Finansowanie rozwoju jako wyzwanie strategiczne w zarządzaniu klastrami. Nauki o Finansach, (32), 9- 27.
  5. Bembenek, B., & Kowalska, K. (2016). SMEs development within industrial clusters-Strategic challenge for cluster management. Modern Management Review, 21(23(4)), 33-50. https://doi.org/10.7862/rz.2016.mmr.41
  6. Berthinier-Poncet, A. (2014). Gouvernance et dynamiques d'innovation au sein d'un technopôle. Une analyse par les pratiques institutionnelles d'innovation. Management international/International Management/Gestiòn Internacional, 19(1), 94-112. https://doi.org/10.7202/1028492ar
  7. Berthinier-Poncet, A., Grama-Vigouroux, S., & Saidi, S. (2018). Open innovation practices of clustered SMEs: The intermediate role of cluster governance. In W. Vanhaverbeke, F. Frattini, N. Roijakkers, & M. Usman (Eds.), Researching Open Innovation in SMEs (pp. 275-306). World Scientific. https://doi.org/10.1142/9789813230972_0009
  8. Bogers, M. (2011). The open innovation paradox: Knowledge sharing and protection in R&D collaborations. European Journal of Innovation Management, 14(1), 93-117. https://doi.org/10.1108/14601061111104715
  9. Brosnan, S., Doyle, E., & O'Connor, S. (2016). From Marshall's Triad to Porter's Diamond: Added value?. Competitiveness Review, 26(5), 500-516. https://doi.org/10.1108/CR-05-2015-0037
  10. Burcharth, A. L., Knudsen, M. P., & Søndergaard, H. A. (2014). Neither invented nor shared here: The impact and management of attitudes for the adoption of open innovation practices. Technovation, 34(3), 149-161. http://doi.org/10.1016/j.technovation.2013.11.007
  11. Carayannis, E. G., & Campbell, D. F. (2011). Open innovation diplomacy and a 21st century fractal research, education and innovation (FREIE) ecosystem: Building on the quadruple and quintuple helix innovation concepts and the "mode 3" knowledge production system. Journal of the Knowledge Economy, 2(3), 327. https://doi.org/10.1007/s13132-011-0058-3
  12. Carlino, G. A. (2001). Knowledge spillovers: Cities' role in the new economy. Business Review Quarterly, 4(1), 17-24. https://ideas.repec.org/a/fip/fedpbr/y2001iq4p17-26.html
  13. Castro Gonçalves, L. (2012). Learning dynamics across boundaries of IS context: A structural perspective to support knowledge management. Management international/International Management/Gestiòn Internacional, 16, 41-55. https://doi.org/10.7202/1012392ar
  14. Castro, L. (2015). Strategizing across boundaries: Revisiting knowledge brokering activities in French innovation clusters. Journal of Knowledge Management, 19 (5), 1048-1068. https://doi.org/10.1108/JKM-02-2015-0050
  15. Chesbrough, H., & Bogers, M. (2014). Explicating open innovation: Clarifying an emerging paradigm for understanding innovation. In Chesbrough, H., Vanhaverbeke, W., & West, J. (Eds.), New Frontiers in Open Innovation (pp. 3-28). Oxford: Oxford University Press. http://doi.org.pl/ 10.1093/acprof:oso/9780199682461.003.0001
  16. Chesbrough, H. (2003). The logic of open innovation: Managing intellectual property. California Management Review, 43(3), 33-58. https://doi.org/10.1177/000812560304500301
  17. Chesbrough, H. W. (2006). Open Innovation: The New Imperative for Creating and Profiting from Technology. Boston: Harvard Business Press.
  18. Chesbrough, H. W., & Appleyard, M. M. (2007). Open innovation and strategy. California Management Review, 50(1), 57-76. https://doi.org/10.2307/41166416
  19. Chesbrough, H., Vanhaverbeke, W., & West, J. (Eds.). (2014). New Frontiers in Open Innovation. Oxford: Oxford University Press. https://doi.org/10.1093/acprof:oso/9780199682461.001.0001
  20. Chiaroni, D., Chiesa, V., & Frattini, F. (2011). The open innovation journey: How firms dynamically implement the emerging innovation management paradigm. Technovation, 31(1), 34-43. https://doi.org/10.1016/j.technovation.2009.08.007
  21. Christensen, J.F., Olesen, M.H., & Kjaer, J.S. (2005). The industrial dynamics of open innovation- Evidence from the transformation of consumer electronics. Research Policy, 34(10), 1533-1549. https://doi.org/10.1016/j.respol.2005.07.002
  22. European Commission. (2018). Proposal for a  regulation of the European Parliament and of the Council establishing Horizon Europe - The framework programme for research and innovation, laying down its rules for participation and dissemination. Retrieved from https://eur-lex.europa.eu/legal-content/EN/TXT/?uri=CELEX %3A52018PC0435
  23. Creswell, J. W. (2009). Mapping the field of mixed methods research. Journal of Mixed Methods Research, 3(2). https://doi.org/ 10.1177/155868980833088
  24. Creswell, J.W., Hanson, W.E., Clark Plano, V.L., & Morales, A. (2007). Qualitative research designs: Selection and implementation. The Counseling Psychologist, 35(2), 236-264. https://doi.org/10.1177/0011000006287390
  25. Czakon, W. (2014). Problem granic w badaniach sieci międzyorganizacyjnych. Studia i Prace Kolegium Zarządzania i Finansów Szkoły Głównej Handlowej, (135), 89-98.
  26. Dahlander, L., & Gann, D. M. (2010). How open is innovation?. Research Policy, 39 (6), 699-709. https://doi.org/10.1016/j.respol.2010.01.013
  27. Delgado, M., Porter, M. E., & Stern, S. (2016). Defining clusters of related industries. Journal of Economic Geography, 16(1), 1-38. https://doi.org/10.1093/jeg/lbv017
  28. De Silva, M., Howells, J., & Meyer, M. (2018). Innovation intermediaries and collaboration: Knowledge-based practices and internal value creation. Research Policy, 47(1), 70-87. https://doi.org/10.1016/j.respol.2017.09.011
  29. Di Minin A., & Rossi M. (2016) Open innovation and clusters: Why geographical proximity matters. In K. Gretschmann, & S. Schepers (Eds.), Revolutionising EU Innovation Policy (pp. 79-95). London: Palgrave Macmillan. https://doi.org/10.1057/978-1-137-55554-0_4
  30. Dittrich, K., & Duysters, G. (2007). Networking as a  means to strategy change: The case of open innovation in mobile telephony. Journal of Product Innovation Management, 24(6), 510-521. https://doi.org/10.1111/j.1540-5885.2007.00268.x
  31. Edler, J., & Yeow, J. (2016). Connecting demand and supply: The role of intermediation in public procurement of innovation. Research Policy, 45(2), 414-426. https://doi.org/10.1016/j.respol.2015.10.010
  32. Edmondson, A. C., & McManus, S. E. (2007). Methodological fit in management field research. Academy of Management Review, 32(4), 1246-1264. https://doi.org/10.5465/amr.2007.26586086
  33. Engel, J. S. (2015). Global clusters of innovation: Lessons from Silicon Valley. California Management Review, 57(2), 36-65. https://doi.org/10.1525/cmr.2015.57.2.36
  34. Faems, D., De Visser, M., Andries, P., and Van Looy, B. (2010). Technology alliance portfolios and financial performance: Value-enhancing and cost- increasing effects of open innovation. Journal of Product Innovation Management, 27(6), 785-796. https://doi.org/10.1111/j.1540-5885.2010.00752.x
  35. Fasnacht, D. (2009). Open Innovation in the Financial Services: Growing Through Openness, Flexibility and Customer Integration. Berlin: Springer. https://doi.org/10.1007/978-3-540-88231-2
  36. Femenias, P., & Hagbert, P. (2013). The habitation lab: Using a design approach to foster innovation for sustainable living. Technology Innovation Management Review, 3(11). http://timreview.ca/article/741
  37. Fetterhoff, T. J., & Voelkel, D. (2006). Managing open innovation in biotechnology. Research-Technology Management, 49 (3), 14-18. https://doi.org/10.1080/08956308.2006.11657373
  38. Gassmann, O., Enkel, E., & Chesbrough, H. (2010). The future of open innovation. R&D Management, 40(3), 213-221. https://doi.org/10.1111/j.1467-9310.2010.00605.x
  39. Gorynia, M., & Jankowska, B. (2008). Klastry a  Międzynarodowa Konkurencyjność i Internacjonalizacja Przedsiębiorstwa. Warszawa; Centrum Doradztwa i Informacji Difin.
  40. Howells, J. (2006). Intermediation and the role of intermediaries in innovation. Research Policy, 35(5), 715-728. https://doi.org/10.1016/j.respol.2006.03.005
  41. Huang, F., Rice, J., & Martin, N. (2015). Does open innovation apply to China? Exploring the contingent role of external knowledge sources and internal absorptive capacity in Chinese large firms and SMEs. Journal of Management & Organization, 21(5), 594-613. https://doi.org/10.1017/jmo.2014.79
  42. Huizingh, E. K. (2011). Open innovation: State of the art and future perspectives. Technovation, 31(1), 2-9. https://doi.org/10.1016/j.technovation.2010.10.002
  43. Jankowska, B., & Götz, M. (2017). Internationalization intensity of clusters and their impact on firm internationalization: The case of Poland. European Planning Studies, 25(6), 958-977. https://doi.org/10.1080/09654313.2017.1296111
  44. Katzy, B., Turgut, E., Holzmann, T., & Sailer, K. (2013). Innovation intermediaries: A process view on open innovation coordination. Technology Analysis & Strategic Management, 25(3), 295-309. https://doi.org/10.1080/09537325.2013.764982
  45. Kivimaa, P., Boon, W., Hyysalo, S., & Klerkx, L. (2019). Towards a typology of intermediaries in sustainability transitions: A systematic review and a research agenda. Research Policy, 48(4), 1062-1075. https://doi.org/10.1016/j.respol.2018.10.006
  46. Kępka, B., & Kacperek, D. (2017). Wdrażanie Standardów Zarządzania Klastrem. Poradnik dla Koordynatorów. Warszawa: PARP. Retrieved from https://www.parp.gov.pl/component/ publications/publication/wdrazanie-standardow-zarzadzania- klastrem-poradnik-dla-koordynatorow
  47. Koszarek, M. (2014). Supporting the development of clusters in Poland - Dilemmas faced by public policy. Prace Naukowe Uniwersytetu Ekonomicznego we Wrocławiu, (365), 103-112. https://doi.org/10.15611/pn.2014.365.08
  48. Köcker, G. M., Schneider, K., & Grieb, B. (2017). Success through thinking out of the box: Strategic differentiation in enterprises initiated by cluster initiatives. Retrieved from https://vdivde- it.de/en/publication/success-through-thinking-out-box
  49. Kowalski, A. M. (2013). Znaczenie Klastrów dla Innowacyjności Gospodarki w Polsce. Warszawa: Szkoła Głowna Handlowa Oficyna Wydawnicza.
  50. Lammer-Gamp, T., zu Kocker, G. M., & Christensen, T. A. (2011). Clusters are individuals. Danish Ministry of Research, Innovation and Higher Education. Retrieved from https://ufm.dk/en/publications/2011/clusters-are-individuals-creating-economic-growth-through- cluster-policies-for-cluster-management-excellence
  51. Laursen, K., & Salter, A. (2004). Searching high and low: What types of firms use universities as a source of innovation?. Research Policy, 33(8), 1201-1215. https://doi.org/10.1016/j.respol.2004.07.004
  52. Laursen, K., & Salter, A. (2006). Open for innovation: The role of openness in explaining innovation performance among UK manufacturing firms. Strategic Management Journal, 27(2), 131-150. https://doi.org/10.1002/smj.507
  53. Lee, S., Park, G., Yoon, B., & Park, J. (2010). Open innovation in SMEs-An intermediated network model. Research Policy, 39(2), 290-300. https://doi.org/10.1016/j.respol.2009.12.009
  54. Lewandowska, M. S. (2017, March) Otwarte innowacje wyzwaniem współczesnego zarządzania. Paper presented at "Sympozjum VII: Współczesne problemy zarządzania", Warszawa.
  55. Link, A. N., Siegel, D. S., & Bozeman, B. (2007). An empirical analysis of the propensity of academics to engage in informal university technology transfer. Industrial and Corporate Change, 16(4), 641-655 https://doi.org/10.4337/9781786432797.00014
  56. Mariotti, S., Mutinelli, M., & Piscitello, L. (2008). The internationalization of production by Italian industrial districts' firms: structural and behavioural determinants. Regional Studies, 42(5), 719- 735. https://doi.org/10.1080/00343400701543264
  57. Meyer, M., Kuusisto, J., Grant, K., De Silva, M., Flowers, S., & Choksy, U. (2019). Towards new triple helix organisations? A comparative study of competence centres as knowledge, consensus and innovation spaces. R&D Management, 49(4), 555- 573. https://doi.org/10.1111/radm.12342
  58. Monfardini, E., Probst, L., Szenci, K., Cambier, B., & Frideres, L. (2012). Emerging industries: Report on the methodology for their classification and on the most active, significant and relevant new emerging industrial sectors. European Commission. Retrieved from https://ec.europa.eu/research/industrial_technologies/pdf/emerging-industries- report_en.pdf
  59. Morgulis-Yakushev, S., & Sölvell, Ö. (2017). Enhancing dynamism in clusters: A model for evaluating cluster organizations' bridge-building activities across cluster gaps. Competitiveness Review, 27(2), 98-112. https://doi.org/10.1108/CR-02-2016-0015
  60. Morosini, P. (2004). Industrial clusters, knowledge integration and performance. World Development, 32(2), 305 -326. https://doi.org/10.1016/j.worlddev.2002.12.001
  61. Moss, T. (2009). Intermediaries and the governance of sociotechnical networks in transition. Environment and Planning A, 41(6), 1480-1495. https://doi.org/10.1068/a4116
  62. Moszkowicz, K., & Bembenek, B. (2017). Innowacyjność́ polskich klastrów- strategiczne wyzwanie w zarządzaniu klastrami. Organizacja i Kierowanie, (4), 27-45. https://www.ceeol.com/search/article-detail?id=719736
  63. Nestle, V., Täube, F. A., Heidenreich, S., & Bogers, M. (2019). Establishing open innovation culture in cluster initiatives: The role of trust and information asymmetry. Technological Forecasting and Social Change, 146, 563-572. https://doi.org/10.1016/j.techfore.2018.06.022
  64. NGP Excellence. (2011). 24 proofs of Cluster Excellence - Successful Stories from Clusters in Northern Europe. Cluster Excellence in the Nordic Countries, Germany and Poland. Project Report. VDI/VDE-IT. Retrieved from https://ufm.dk/en/publications/2011/files-2011/24-proofs-of-cluster- excellence_webedition.pdf
  65. Paliokaite, A. (2019). An innovation policy framework for upgrading firm absorptive capacities in the context of catching-up economies. Journal of Entrepreneurship, Management and Innovation, 15(3), 103-130. https://doi.org/10.7341/20191534
  66. Parida, V., Westerberg, M., & Frishammar, J. (2012). Inbound open innovation activities in high-tech SMEs: The impact on innovation performance. Journal of Small Business Management, 50(2), 283-309. https://doi.org/10.1111/j.1540-627X.2012.00354.x
  67. Pichlak, M. (2012). Otwarte innowacje jako nowy paradygmat w zarządzaniu innowacjami. Zeszyty Naukowe: Organizacja i Zarządzanie/Politechnika Śląska, 281-292. Retrieved from http://yadda.icm.edu.pl/yadda/element/bwmeta1.element.baztech- article-BSL9-0066-0028
  68. Piotrowski, M. (2014). Standardy Zarządzania Klastrem. Warszawa: Polska Agencja Rozwoju Przedsiębiorczości. Retrieved from https://www.parp.gov.pl/storage/publications/pdf/2016_standardy_klastrowe_iied.pdf
  69. Polish Agency for Enterprise Development. (2012). Cluster Benchmarking in Poland. Retrieved from https://www.parp.gov.pl/storage/publications/pdf/2012_cluster_benchmarking_en.pdf
  70. Polish Agency for Enterprise Development. (2014). Cluster Benchmarking in Poland. Retrieved from https://www.parp.gov.pl/storage/publications/pdf/2014_cluster_benchmarking_en.pdf
  71. Porter, M. E. (1990). The competitive advantage of nations. Harvard Business Review, 68(2), 73-93.
  72. Porter, M. E. (1998). Clusters and the new economics of competition. Harvard Business Review, 76(6), 77- 90.
  73. Radziwon, A., Bogers, M., & Bilberg, A. (2014). Managing open innovation across SMEs: The case of a regional ecosystem. Academy of Management Proceedings, 2014(1). https://doi.org/10.5465/ambpp.2014.11740abstract
  74. Sieg, J. H., Wallin, M. W., & Von Krogh, G. (2010). Managerial challenges in open innovation: A study of innovation intermediation in the chemical industry. R&D Management, 40(3), 281-291. https://doi.org/10.1111/j.1467- 9310.2010.00596.x
  75. Sisodiya, S. R., Johnson, J. L., & Grégoire, Y. (2013). Inbound open innovation for enhanced performance: Enablers and opportunities. Industrial Marketing Management, 42(5), 836 -849. https://doi.org/10.1016/j.indmarman.2013.02.018
  76. Smedlund, A. (2006). The roles of intermediaries in a regional knowledge system. Journal of Intellectual Capital. 7(2), 204-220. https://doi.org/10.1108/14691930610661863
  77. Solvell, O., Lindqvist, G., & Ketels, C. (2003). The Cluster Initiative Greenbook. Stockholm: Ivory Tower. http://www.cluster- research.org/greenbook.htm
  78. Sopińska, A., & Mierzejewska, W. (2016). Otwarte innowacje źródłem sukcesu przedsiębiorstw. Zarządzanie i Finanse, 14(2), 259-374
  79. Stanisławski, R. (2014). Open innovation wśród małych i średnich przedsiębiorstw jako instrument kształtowania przewagi konkurencyjnej. Ekonomia i Zarządzanie, 6(2), 169-184. https://doi.org/10.12846/j.em.2014.02.13
  80. Stanisławski, R. (2017). Open Innovation a Rozwój Innowacyjny Mikro, Małych i Średnich Przedsiębiorstw. Łódź: Wydawnictwo Politechniki Łódzkiej.
  81. Stanko, M. A., & Henard, D. H. (2017). Toward a better understanding of crowdfunding, openness and the consequences for innovation. Research Policy, 46(4), 784-798. https://doi.org/10.1016/j.respol.2017.02.003
  82. Taylor, S. J., Bogdan, R., & DeVault, M. (2015). Introduction to qualitative research methods: A guidebook and resource. John Wiley & Sons.
  83. Teece, D. J. (2014). The foundations of enterprise performance: Dynamic and ordinary capabilities in an (economic) theory of firms. Academy of Management Perspectives, 28(4), 328-352. https://doi.org/10.5465/amp.2013.0116
  84. Teirlinck, P., & Spithoven, A. (2013). Formal R&D management and strategic decision making in small firms in knowledge-intensive business services. R&D Management, 43(1), 37-51. https://doi.org/10.1111/j.1467-9310.2012.00701.x
  85. Tjong Tjin Tai, S. Y., Veraart, F., & Davids, M. (2015). How the Netherlands became a bicycle nation: Users, firms and intermediaries, 1860-1940. Business History, 57(2), 257-289. https://doi.org/10.1080/00076791.2014.928695
  86. Van de Vrande, V., De Jong, J. P., Vanhaverbeke, W., & De Rochemont, M. (2009). Open innovation in SMEs: Trends, motives and management challenges. Technovation, 29(6-7), 423-437. https://doi.org/10.1016/j.technovation.2008.10.001
  87. Veeckman, C., Schuurman, D., Leminen, S., & Westerlund, M. (2013). Linking living lab characteristics and their outcomes: Towards a conceptual framework. Technology Innovation Management Review, 3(12), 6-15. https:// doi.org/ 10.22215/timreview/748
  88. Wallin, M. W., & Von Krogh, G. (2010). Organizing for open innovation: focus on the integration of knowledge. Organizational Dynamics, 39(2), 145-154. https://doi.org/10.1016/j.orgdyn.2010.01.010
  89. West, J., & Bogers, M. (2014). Leveraging external sources of innovation: a review of research on open innovation. Journal of Product Innovation Management, 31(4), 814-831. https://doi.org/10.1111/jpim.12125
  90. Zimmermann, J. B. (2001). The firm/territory relationships in the globalisation: Towards a new rationale. European Journal of Economic and Social Systems, 15(1), 57-75. https://doi.org/10.1051/ejess:2001108
Cytowane przez
Pokaż
ISSN
2299-7075
Język
eng
URI / DOI
https://doi.org/10.7341/20201634
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