手法を比較

	Triple Helix Analysis	Quadruple Helix Analysis
分野	Science Technology Studies	Science Technology Studies
系統	Process / pipeline	Process / pipeline
提唱年	2000	2009
提唱者	Henry Etzkowitz & Loet Leydesdorff	Elias Carayannis & David Campbell (Quadruple Helix); Loet Leydesdorff (N-tuple formalisation)
種類	Innovation-systems framework and bibliometric indicator	Innovation-ecosystem framework
原典	Etzkowitz, H., & Leydesdorff, L. (2000). The dynamics of innovation: from National Systems and 'Mode 2' to a Triple Helix of university–industry–government relations. Research Policy, 29(2), 109-123.	Carayannis, E. G., & Campbell, D. F. J. (2009). 'Mode 3' and 'Quadruple Helix': toward a 21st century fractal innovation ecosystem. International Journal of Technology Management, 46(3-4), 201-234.
別名	Triple Helix indicator, University-industry-government analysis, Triple Helix synergy analysis	Quadruple Helix model, Mode 3 innovation analysis, N-tuple helix analysis
関連	4	4
概要	Triple Helix analysis is a framework and bibliometric method for studying knowledge-based innovation as the evolving interplay of three institutional spheres—university, industry, and government. Rather than treating these as separate actors that occasionally cooperate, it models innovation as the overlapping, mutually shaping relations among them, and offers an information-theoretic indicator that quantifies how much the three spheres jointly reduce uncertainty in a knowledge economy.	Quadruple Helix analysis extends the Triple Helix of university-industry-government relations by adding a fourth helix—the media-based and culture-based public, civil society, and users—as a constitutive actor in innovation. It frames innovation as a 'Mode 3' fractal ecosystem in which knowledge is co-produced across multiple spheres, and it situates this within a broader N-tuple generalisation that can add further helices such as the natural environment in the Quintuple Helix.