Bibliography

B. Achilladelis, A. B. Robertson, P. Jervis "Project SAPPHO", 1971.

P. Aghion, J. Tirole "The Management of Innovation", Quarterly Journal of Economics, 1994, 1185-1209.

R. C. Allen "Collective Invention", Journal of Economic Behavior and Organization, 1983, 1-24.

T. J. Allen "Studies of the Problem-Solving Process in Engineering Design", IEEE Transactions on Engineering Management, 1966, 72-83.

T. M. Amabile "Creativity in Context", 1996, Westview..

Kristin Antelman "Do Open Access Articles Have a Greater Research Impact?", College and Research Libraries, 2004, 372-382.

Y. M. Antorini "The Making of a Lead User", 2005.

J. S. Armstrong "Principles of Forecasting", 2001, Kluwer.

A. Arora, A. Gambardella "The Changing Technology of Technological Change", Research Policy, 1994, 523-532.

A. Arora, A. Fosfuri, A. Gambardella "Markets for Technology", 2001, MIT Press.

K. Arrow "Economic Welfare and the Allocation of Resources for Inventions", The Rate and Direction of Inventive ActivityR. R. R. R. Nelson, 1962, Princeton University Press..

A. Arundel "The Relative Effectiveness of Patents and Secrecy for Appropriation", Research Policy, 2001, 611-624.

R. Balachandra, J. H. Friar "Factors for Success in R&D Projects and New Product Introduction: A Contextual Framework", IEEE Transactions on Engineering Management, 1997, 276-287.

C. Y. Baldwin, Clark. K. B. "Does Code Architecture Mitigate Free Riding in the Open Source Development Model?", 2003, Harvard Business School..

B. Barnes, D. Ulin "Liability for New Products", AWWA Journal, 1984-02, 44-47.

J. Baron "Thinking and Deciding", 1988, Cambridge University Press.

B. Behlendorf "Open Source as a Business Strategy"Dibona C.S. Ockman, M. Stone, 1999, O'Reilly..

Y. Benkler "Intellectual Property and the Organization of Information Production", International Review of Law and Economics, 2002, 81-107.

J. Bessen "Patent Thickets", 2003.

J. Bessen, R. M. Hunt "An Empirical Look at Software Patents", 2004.

J. Bessen "Open Source Software", 2004.

Wiebe Bijker "Of Bicycles, Bakelites and Bulbs", 1995.

M. Boldrin, D. Levine "The Case against Intellectual Property", 2002-05, 209-212.

T. F. Bresnahan, S. Greenstein "Technical Progress and Co-Invention in Computing and in the Uses of Computers", 1996, 1-77.

T. F. Bresnahan, S. Greenstein "The Competitive Crash in Large-Scale Commercial Computing"R Landau, T. Taylor, G. Wright, 1996, Stanford University Press.

T. F. Bresnahan, G. Saloner "`Large Firms' Demand for Computer Products and Services: Market Models, Inertia, and Enabling Strategic Change."Yoffie,D. B., 1997, Harvard Business School Press.

P. F. Jr. Brooks "The Mythical Man-Month", 1979, Addison-Wesley.

J. S. Brown, P. Duguid "Organizational Learning and Communities-of-Practice: Toward a Unified View of Working, Learning, and Innovation", Organization Science, 1991, 40-57.

T. C., Champ, P. A. Brown, Bishop,R. C.D. W. McCollum "Which Response Format Reveals the Truth about Donations to a Public Good", Land Economics, 1996, 152-166..

G. Buenstorf "Designing Clunkers: Demand-Side Innovation and the Early History of Mountain Bike"J. S. Metcalfe, U. Cantner, 2002, Physica.

E. H. Chamberlin "Product Heterogeneity and Public Policy", American Economic Review, 1950, 85-92.

C. M. Christensen "The Innovator's Dilemma", 1997, Harvard Business School Press.

W. M. Cohen, D. A. Levinthal "The Implications of Spillovers for R&D Investment and Welfare: A New Perspective", Administrative Science Quarterly, 1990, 128-152.

W. M. Cohen, R. R. Nelson, J. P. Walsh "Protecting Their Intellectual Assets", 2000.

W. M. Cohen, Goto,A.Nagata,A.Nelson,R. R.J. P. Walsh "R&D Spillovers, Patents and the Incentives to Innovate in Japan and the United States", Research Policy, 2002, 1349-1367.

M. Coller, T. L. Yohn "Management Forecasts: What Do We Know?", Financial Analysts Journal, 1998, 58-62.

J. L. Connell, L. B. Shafer "Structured Rapid Prototyping", 1989, Prentice-Hall.

K. R. Conner, C. K. Prahalad "A Resource-Based Theory of the Firm: Knowledge versus Opportunism", Organization Science, 1996, 477-501.

T. D. Cook, D. T. Campbell "Quasi-Experimentation", 1979, Houghton Mifflin.

M. Csikszentmihalyi "Beyond Boredom and Anxiety", 1975, Jossey-Bass.

M. Csikszentmihalyi "Flow", 1990, Harper and Row.

M. Csikszentmihalyi "Creativity", 1996, HarperCollins.

K. W. Dam "Some Economic Considerations in the Intellectual Property Protection of Software", Journal of Legal Studies, 1995, 321-377.

Erwin. Danneels "Disruptive Technology Reconsidered: A Critique and Research Agenda", Journal of Product Innovation Management, 2004, 246-258..

P. Dasgupta, P. A. David "Toward a New Economics of Science", Policy Research, 1994, 487-521.

P. A. David "Knowledge, Property, and the System Dynamics of Technological Change", 1992, 215-247.

P. A. David "Knowledge Spillovers, Technology Transfers, and the Economic Rationale for Public Support of Exploratory Research in Science", 1998.

C. Dellarocas, N. F. Awad, X. (M.) Zhang "Exploring the Value of Online Reviews to Organizations", 2004.

R. Duke "Local Building Codes and the Use of Cost-Saving Methods", 1988.

B. Efron "Bootstrap Methods: Another Look at the Jackknife", Annals of Statistics, 1979, 1-26.

Ehrenkrantz Group. "A Study of Existing Processes for the Introduction of New Products and Technology in the Building Industry", 1979.

T. Elrod, A. P. Kelman "Reliability of New Product Evaluation as of 1968 and 1981", 1987.

J. L. Enos "Petroleum Progress and Profits", 1962, MIT Press.

L. Fleming "Recombinant Uncertainty in Technological Search", Management Science, 2001, 117-132.

D. Foray "Economics of Knowledge", 2004, MIT Press.

N. Franke, E. von Hippel "Finding Commercially Attractive User Innovations", 2003.

N. Franke, S. Shah "How Communities Support Innovative Activities: An Exploration of Assistance and Sharing Among End-Users", Research Policy, 2003, 157-178.

N. Franke, H. Reisinger "Remaining within Cluster Variance", 2003.

N. Franke, E. von Hippel "Satisfying Heterogeneous User Needs via Innovation Toolkits: The Case of Apache Security Software", Research Policy, 2003, 1199-1215.

C. Freeman "Chemical Process Plant: Innovation and the World Market", National Institute Economic Review, 1968, 29-57.

D. Friedman, D. McAdam "Collective Identity and Activism: Networks, Choices, and the Life of a Social Movement"A. D. Morris, C. McClurg, 1992.

N. Gallini, S. Scotchmer "Intellectual Property: When Is It the Best Incentive System?", Innovation Policy and the EconomyA. Jaffe, J. Lerner, S. Stern, 2002, MIT Press.

P. E. Green "A New Approach to Market Segmentation", Business Horizons, 1971, 61-73.

P. E. Green, C. M. Schaffer "Cluster-Based Market Segmentation: Some Further Comparisons of Alternative Approaches", Journal of the Market Research Society, 1998, 155-163.

B. H. Hall, R. Ham Ziedonis "The Patent Paradox Revisited: An Empirical Study of Patenting in the US Semiconductor Industry, 1979-1995", RAND Journal of Economics, 2001, 101-128.

B. H. Hall, D. Harhoff "Post-Grant Reviews in the US Patent System: Design Choices and Expected Impact", Berkeley Law Technology Journal, 2004.

D. Harhoff "Strategic Spillovers and Incentives for Research and Development", Management Science, 1996, 907-925.

D. Harhoff, J. Henkel, E. von Hippel "Profiting from Voluntary Information Spillovers: How Users Benefit by Freely Revealing Their Innovations", Research Policy, 2003, 1753-1769.

F. Hecker "Setting Up Shop: The Business of Open Source Software", IEEE Software, 1999, 45-51.

M. A. Heller, R. S. Eisenberg "Can Patents Deter Innovation? The Anticommons in Biomedical Research", Science Magazine, 1998, 698-701.

M. A. Heller "The Tragedy of the Anticommons: Property in the Transition from Marx to Markets", Harvard Law Review, 1998, 621-688.

J. 2004 Henkel "Patterns of Free Revealing", .

J. Henkel, S. Thies "Customization and Innovation: User Innovation Toolkits for Simulator Software", Proceedings of the 2003 Congress on Mass Customization and Personalization (MCPC 2003), Munich., 2003.

J. Henkel "Software Development in Embedded Linux: Informal Collaboration of Competing Firms"W Uhr, W. Esswein, E. Schoop, 2003, Physica.

J. Henkel, E. von Hippel "Welfare Implications of User Innovation", Journal of Technology Transfer, 2005, 73-87.

J Henkel "The Jukebox Mode of Innovation", 2004.

C. Herstatt, E. von Hippel "From Experience: Developing New Product Concepts via the Lead User Method", Journal of Product Innovation Management, 1992, 213-222.

G. Hertel, S. Niedner, S. Herrmann "Motivation of Software Developers in Open Source Projects: An Internet-Based Survey of Contributors to the Linux Kernel", Research Policy, 2003, 1159-1177.

C. Hienerth "The Commercialization of User Innovations: Sixteen Cases in an Extreme Sporting Industry", Proceedings of the 26th R&D Management Conference, Sesimbra, Portugal, 2004.

J. Hirschleifer "The Private and Social Value of Information and the Reward to Inventive Activity", American Economic Review, 1971, 561-574.

S. Hollander "The Sources of Increased Efficiency", 1965, MIT Press.

M. Horwich "Clipped Wings", 1982, MIT Press.

R. M. Hunt, J. Bessen "The Software Patent Experiment", 2004, 22-32..

M. C. Jensen, W. H. Meckling "Theory of the Firm: Managerial Behavior, Agency Costs, and Ownership Structure", Journal of Financial Economics, 1976, 305-360.

L. B. Jeppesen, M. J. Molin "Consumers as Co-developers: Learning and Innovation Outside the Firm", Technology Analysis and Strategic Management, 2003, 363-84.

L. B. Jeppesen "Profiting from Innovative User Communities", 2004.

L. B. Jeppesen "User Toolkits for Innovation: Users Support Each Other", Journal of Product Innovation Management, 2005.

M. Jokisch "Open Source Software-Entwicklung: Eine Analyse des Geschäftsmodells der STATA Corp", 2001.

D. J. Jr. Ketchen, C. L. Shook "The Application of Cluster Analysis in Strategic Management Research: An Analysis and Critique", Strategic Management Journal, 1996, 441-459.

K. E. Knight "A Study of Technological Innovation: The Evolution of Digital Computers", 1963.

P. Kollock "The Economies of Online Cooperation: Gifts and Public Goods in Cyberspace", Communities in CyberspaceM. A. Smith, P. Kollock, 1999, Routledge.

M. Kotabe "The Return of 7-Eleven ... from Japan: The Vanguard Program", Columbia Journal of World Business, 1995, 70-81.

P. S. Kristensen "Flying Prototypes: Production Departments' Direct Interaction with External Customers", International Journal of Operations and Production Management, 1992, 195-211.

K. R. Lakhani, E. von Hippel "How Open Source Software Works: `Free' User-to-User Assistance", Research Policy, 2003, 923-943.

K. R. Lakhani, B. Wolf "Why Hackers Do What They Do: Understanding Motivation and Effort in Free/Open Source Software Projects", Perspectives on Free and Open Source SoftwareJ. Feller, B. Fitzgerald, S. Hissam, K. R. Lakhani, 2005, MIT Press..

K. Lakhani "Distributed Coordination Practices in Free and Open Source Communities", 2005.

J. Lerner, J. J. Tirole "Some Simple Economics of Open Source", Journal of Industrial Economics, 2002, 197-234.

L. Lessig "The Future of Ideas", 2001, Random House.

C. Lettl, C. Herstatt, H. Gemünden "The Entrepreneurial Role of Innovative Users", 2004.

R. C. Levin, A. Klevorick, R. R. Nelson, S. G. Winter "Appropriating the Returns from Industrial Research and Development", 1987, 783-820.

S. Levy "Hackers", 1984, Doubleday.

G. L. Lilien, P. D. Morrison, K. Searls, M. Sonnack, E. von Hippel "Performance Assessment of the Lead User Idea-Generation Process for New Product Development", Management Science, 2002, 1042-1059.

K. Lim "The Many Faces of Absorptive Capacity", 2000.

G. Lindsey, G. Knaap "Willingness to Pay for Urban Greenway Projects", Journal of the American Planning Association, 1999, 297-313.

J. Loomis, T. Brown, B. Lucero, G. Peterson "Improving Validity Experiments of Contingent Valuation Methods: Results of Efforts to Reduce the Disparity of Hypothetical and Actual Willingness to Pay", Land Economics, 1996, 450-461.

C. Lüthje, C. von Hippel, E. Herstatt "The Dominant Role of Local Information in User Innovation: The Case of Mountain Biking", 2002.

C. Lüthje "Customers as Co-Inventors: An Empirical Analysis of the Antecedents of Customer-Driven Innovations in the Field of Medical Equipment", Proceedings of the 32th EMAC Conference, Glasgow., 2003.

C. Lüthje "Characteristics of Innovating Users in a Consumer Goods Field: An Empirical Study of Sport-Related Product Consumers", Technovation, 2004, 683-695.

F. Machlup "Knowledge Production and Distribution in the United States", 1962.

E. Mansfield "Industrial Research and Technological Innovation", 1968, Norton.

E. Mansfield, S. Wagner "Organizational and Strategic Factors Associated With Probabilities of Success in Industrial R&D", Journal of Business, 1975, 179-198.

E. Mansfield, J. Rapoport, A. Romeo, S. Wagner, G. Beardsley "Social and Private Rates of Return from Industrial Innovations", Quarterly Journal of Economics, 1977, 221-240.

E. Mansfield, A. Romeo, M. Schwartz, D. Teece, S. Wagner, P. Brach "Technology Transfer, Productivity, and Economic Policy", 1982, Norton.

E. Mansfield "How Rapidly Does New Industrial Technology Leak Out?", Journal of Industrial Economics, 1985, 217-223.

D. L. Marples "The Decisions of Engineering Design", 1961-06, 55-71.

J. Martin "Rapid Application Development", 1991, Macmillan.

J. Matthews "Public Access to Online Catalogs", 1985, Neal-Schuman.

S. Maurer "Inside the Anticommons: Academic Scientists' Struggle to Commercialize Human Mutations Data, 1999-2001", Research Policy, 2005.

C. Mead, L. Conway "Introduction to VLSI Systems", 1980, Addison-Wesley.

R. S. Means "Building Construction Cost Data", 1989.

R. Merges, R. R. Nelson "On the Complex Economics of Patent Scope", Columbia Law Review, 1990, 839-916.

R. K. Merton "The Sociology of Science", 1973, University of Chicago Press.

M. H., and L. Lopez Meyer "Technology Strategy in a Software Products Company", Journal of Product Innovation Management, 1995, 194-306.

G. W. Milligan, M. C. Cooper "An Examination of Procedures for Determining the Number of Clusters in a Data Set", Psychometrica, 1985, 159-179.

K. Mishina "Essays on Technological Evolution", 1989.

R. C. Mitchell, R. T. Carson "Using Surveys to Value Public Goods", 1989, Resources for the Future.

K. A. Moerke "Free Speech to a Machine", Minnesota Law Review, 2000, 1007-1008.

E. Mollick "Innovations from the Underground: Towards a Theory of Parasitic Innovation", 2004.

P. D. Morrison, J. H. Roberts, E. von Hippel "Determinants of User Innovation and Innovation Sharing in a Local Market", Management Science, 2000, 1513-1527.

P. D. Morrison, Roberts,J. H.D. F. Midgley "The Nature of Lead Users and Measurement of Leading Edge Status", Research Policy, 2004, 351-362.

Mountain Bike "Mountain Biking Skills", 1996, Rodale.

A. M. Jr. Muñiz, T. C. O'Guinn "Brand Community", Journal of Consumer Research, 2001, 412-432.

A. M. Jr. Muñiz, H. J. Schau "When the Consumer Becomes the Marketer", 2004.

J. H. Myers "Segmentation and Positioning for Strategic Marketing Decisions", 1996.

National Sporting Goods Association "Sporting Goods Market in 2001", 2002.

H. Neil, R. Cummings, P. Ganderton, G. Harrison, G. McGuckin "Hypothetical Surveys and Real Economic Commitments", Land Economics, 1994, 145-154.

R. R. Nelson "The Role of Knowledge in R&D Efficiency", Quarterly Journal of Economics, 1982, 453-470.

R. R. Nelson "What Is Public and What Is Private About Technology?", 1990.

R. R. Nelson "National Innovation Systems: A Comparative Analysis", 1993, Oxford University Press.

A. Nuvolari "Collective Invention during the British Industrial Revolution: The Case of the Cornish Pumping Engine", Cambridge Journal of Economics, 2004, 347-363.

S. O'Mahony "Guarding the Commons: How Open Source Contributors Protect Their Work", Research Policy, 2003, 1179-1198.

S. Ogawa "Does Sticky Information Affect the Locus of Innovation? Evidence from the Japanese Convenience-Store Industry", Research Policy, 1998, 777-790.

P. E. Oliver "Rewards and Punishment as Selective Incentives for Collective Action: Theoretical Investigations", American Journal of Sociology, 1980, 1356-1375.

P. E. Oliver, G. Marwell "The Paradox of Group Size in Collective Action: A Theory of the Critical Mass II", American Sociological Review, 1988, 1-18.

E. L. Olson, G. Bakke "Implementing the Lead User Method in a High Technology Firm: A Longitudinal Study of Intentions versus Actions", Journal of Product Innovation Management, 2001, 388-395.

M. Olson "The Logic of Collective Action", 1967, Harvard University Press.

E. Ostrom "A Behavioral Approach to the Rational Choice Theory of Collective Action", American Political Science Review, 1998, 1-22.

K. Pavitt "Sectoral Patterns of Technical Change: Towards a Taxonomy and a Theory", Research Policy, 1984, 343-373.

C. Penning "Bike History", 1998, Delius & Klasing.

B. Perens "The Open Source Definition"C. DiBona, S. Ockman, M. Stone, 1999, O'Reilly.

T. J. Pinch, W. E. Bijker "The Social Construction of Facts and Artifacts"W. Bijker, T . Hughes, T. Pinch, 1987, The MIT Press..

T. Pinch, R. Kline "Users as Agents of Technological Change. The Social Construction of the Automobile in Rural America", Technology and Culture, 1996, 763-795.

J. B. II. Pine "Mass Customization", 1993, Harvard Business School Press.

M. Polanyi "Personal Knowledge", 1958, University of Chicago Press.

J. Poolton, I. Barclay "New Product Development: From Past Research to Future Applications", Industrial Marketing Management, 1998, 197--212.

M. E. Porter "Competitive Advantage of Nations", 1991, Free Press.

R. Prügl, N. Franke "Factors Impacting the Success of Toolkits for User Innovation and Design", 2005.

G. Punj, D. W. Stewart "Cluster Analysis in Marketing Research: Review and Suggestions for Application", Journal of Marketing Research, 1983-05, 134-148.

E. Raymond "The New Hacker's Dictionary", 1996, MIT Press.

E. Raymond "The Cathedral and the Bazaar", 1999, O'Reilly..

W. H. Redmond "An Ecological Perspective on New Product Failure: The Effects of Competitive Overcrowding", Journal of Product Innovation Management, 1995, 200-213.

W., and E. von Hippel. Riggs "Incentives to Innovate and the Sources of Innovation: The Case of Scientific Instruments", Research Policy, 1994, 459-469.

E. M. Rogers "Diffusion of Innovation", 1994, Free Press.

N. Rosenberg "Perspectives on Technology", 1976, Cambridge University Press..

N. Rosenberg "Inside the Black Box", 1982, Cambridge University Press..

R. Rothwell, C. Freeman, A. Horsley, Jervis,V. T. P.A. B. Roberts, J. Townsend "SAPPHO Updated: Project SAPPHO Phase II", Research Policy, 1974, 258-291.

G. Saloner, W. E. Steinmueller "Demand for Computer Products and Services in Large European Organizations", 1996.

H. Sattler "Appropriability of Product Innovations: An Empirical Analysis for Germany", International Journal of Technology Management, 2003, 502--516..

J. Schmookler "Invention and Economic Growth", 1966, Harvard University Press.

M. Schrage "Serious Play", 2000, Harvard Business School Press.

M. Schreier, N. Franke "Value Creation by Self-Design", 2004.

K. Seip, J. Strand "Willingness to Pay for Environmental Goods in Norway: A Contingent Valuation Study with Real Payment", Environmental and Resource Economics, 1992, 91-106.

S. Shah "Sources and Patterns of Innovation in a Consumer Products Field", 2000.

S. Shah, M. Tripsas "When Do User-Innovators Start Firms?", 2004.

C. Shapiro "Navigating the Patent Thicket: Cross Licenses, Patent Pools, and Standard Setting"A. Jaffe, J. Lerner, S. Stern, 2001, MIT Press.

E. Simon "Innovation and Intellectual Property Protection: The Software Industry Perspective", Columbia Journal of World Business, 1996, 30-37.

Stanley F., and Narver, John C. Slater "Customer-Led and Market-Oriented: Let's Not Confuse the Two", Strategic Management Journal, 1998, 1001-1006.

S. Slaughter "Innovation and Learning during Implementation: A Comparison of User and Manufacturer Innovations", Research Policy, 1993, 81-95.

A. Smith "An Inquiry into the Nature and Causes of the Wealth of Nations. Modern Library edition", 1776, Random House.

M. Spence "Product Differentiation and Welfare", American Economic Review, 1976, 407-414.

C. T. Taylor, Z. A. Silberston "The Economic Impact of the Patent System", 1973, Cambridge University Press.

M. Taylor, S. Singleton "The Communal Resource: Transaction Costs and the Solution of Collective Action Problems", Politics and Society, 1993, 195-215.

L. A. Tedd "OPACs through the Ages", Library Review, 1994, 27-37.

D. J. Teece "Technology Transfer by Multinational Firms: The Resource Cost of Transferring Technological Know-How", Economic Journal, 1977, 242-261.

S. H. Thomke "Managing Experimentation in the Design of New Products", Management Science, 1998, 743-762.

S. H. Thomke, E. von Hippel, R. Franke "Modes of Experimentation: An Innovation Process---and Competitive---Variable", Research Policy, 1998, 315-332.

S. H. Thomke, E. von Hippel "Customers as Innovators: A New Way to Create Value", Harvard Business Review, 2002, 74-81.

S. H. Thomke "Experimentation Matters", 2003, Harvard Business School Press..

J. Tirole "The Theory of Industrial Organization", 1988, MIT Press.

D. Tull "The Relationship of Actual and Predicted Sales and Profits in New Product Introductions", Journal of Business, 1967, 233--250.

M. Tyre, E. von Hippel "Locating Adaptive Learning: The Situated Nature of Adaptive Learning in Organizations", Organization Science, 1997, 71-83.

G. L. Urban, E. von Hippel "Lead User Analyses for the Development of New Industrial Products", Management Science, 1988, 569-82.

J. M. Utterback, W. J. Abernathy "A Dynamic Model of Process and Product Innovation", Omega 3, 1975, 639-656.

H. R. Varian "New Chips Can Keep a Tight Rein on Consumers", 2002-07-04.

P. Wayner "Free for All", 2000, Harper Business.

S. Weber "The Success of Open Source", 2004, Harvard University Press.

B. Wellman, J. Boase, W. Chen "The Networked Nature of Community On and Off the Internet", 2002.

E. Wenger "Communities of Practice", 1998, Cambridge University Press.

K. G. Willis, N. A. Powe "Contingent Valuation and Real Economic Commitments: A Private Good Experiment", Journal of Environmental Planning and Management, 1998, 611-619.

Y. Wind "Issues and Advances in Segmentation Research", Journal of Marketing Research, 1978-08, 317-337.

S. G. Winter, G. Szulanski "Replication as Strategy", Organization Science, 2001, 730-743.

G. Young, K. G. Smith, C. M. Grimm "Austrian and Industrial Organization Perspectives on Firm Level Competitive Activity and Performance", Organization Science, 1996, 243-254.

G. de Fraja "Strategic Spillovers in Patent Races", International Journal of Industrial Organization, 1993, 139-146.

R., and C. Kelly. van der Plas "The Original Mountain Bike Book", 1998, MBI.

E. von Hippel "The Dominant Role of Users in the Scientific Instrument Innovation Process", Research Policy, 1976, 212-39.

E. von Hippel "Transferring Process Equipment Innovations from User-Innovators to Equipment Manufacturing Firms", R&D Management, 1977, 13-22.

E. von Hippel, S. N. Finkelstein "Analysis of Innovation in Automated Clinical Chemistry Analyzers", Science and Public Policy, 1979, 24-37.

E. von Hippel "Lead Users: A Source of Novel Product Concepts", Management Science, 1986, 791-805.

E. von Hippel "The Sources of Innovation", 1988, Oxford University Press.

E. von Hippel "Sticky Information and the Locus of Problem Solving: Implications for Innovation", Management Science, 1994, 429-439.

E. von Hippel, M. Tyre "How `Learning by Doing' is Done: Problem Identification in Novel Process Equipment", Research Policy, 1995, 1-12.

E. von Hippel "Economics of Product Development by Users: The Impact of Sticky Local Information", Management Science, 1998, 629-644.

E. von Hippel, S. H. Thomke, M. Sonnack "Creating Breakthroughs at 3M", Harvard Business Review, 1999, 47-57.

E. von Hippel "Perspective: User Toolkits for Innovation", Journal of Product Innovation Management, 2001, 247-257.

E. von Hippel, R. Katz "Shifting Innovation to Users via Toolkits", Management Science, 2002, 821-833.

E. von Hippel, G. von Krogh "Open Source Software and the 'Private-Collective' Innovation Model: Issues for Organization Science", Organization Science, 2003, 209-223.

E. von Hippel, N. Franke, R. Prügl "Screening vs. Pyramiding", 2005.

G. von Krogh, S. Spaeth "Joining, Specialization, and Innovation in Open Source Software Development", 2002.

G. von Krogh, S. Haefliger, S. Spaeth "The Practice of Knowledge Reuse in Open Source Software", 2004.