1. Among important papers documenting this pattern in consumer products: S. Shah, “Sources and Patterns of Innovation in a Consumer Products Field: Innovations in Sporting Equipment,” working paper 4105, MIT Sloan School of Management, Cambridge, Massachusetts, 2000; C. Lüthje, “Characteristics of Innovating Users in a Consumer Goods Field: An Empirical Study of Sport-Related Product Consumers,” Technovation 24, no. 9 (2004): 683-695; R. Tietz, P. Morrison, C. Lüthje and C. Herstatt, “The Process of User-Innovation: A Case Study in a Consumer Goods Setting,” International Journal of Product Development 2, no. 4 (2005): 321-338; and N. Franke, E. von Hippel and M. Schreier, “Finding Commercially Attractive User Innovations: A Test of Lead-User Theory,” Journal of Product Innovation Management 23, no. 4 (2006): 301-315.
2. C.Y. Baldwin and E. von Hippel, “Modeling a Paradigm Shift: From Producer Innovation to User and Open Collaborative Innovation,” Organization Science, in press. See http://papers.ssrn.com.
3. E. von Hippel, J.P.J. de Jong and S. Flowers, “Comparing Business and Household Sector Innovation in Consumer Products: Findings from a Representative Study in the UK,” working paper, September 2010, http://papers.ssrn.com; S. Flowers, E. von Hippel, J. de Jong and T. Sinozic, “Measuring User Innovation in the UK: The Importance of Product Creation by Users” (London: NESTA, 2010); and S. Ogawa and K. Pongtanalert, “Visualizing Invisible Innovation Content: Evidence from Global Consumer Innovation Surveys,” working paper, June 2011, http://papers.ssrn.com.
4. This three-phase process was spelled out in C.Y. Baldwin, C. Hienerth and E. von Hippel, “How User Innovations Become Commercial Products: A Theoretical Investigation and Case Study,” Research Policy 35, no. 9 (November 2006): 1291-1313.
5. S.K. Shah and M. Tripsas, “The Accidental Entrepreneur: The Emergent and Collective Process of User Entrepreneurship,” Strategic Entrepreneurship Journal 1 (November 2007): 123-140.
6. W. Riggs and E. von Hippel, “The Impact of Scientific and Commercial Values on the Sources of Scientific Instrument Innovation,” Research Policy 23 (July 1994): 459-469.
7. J.P.J. de Jong and E. von Hippel, “Transfers of User Process Innovations to Process Equipment Producers: A Study of Dutch High-Tech Firms” Research Policy 38, no. 7 (September 2009): 1181-1191.
8. P. Oliveira and E. von Hippel, “Users as Service Innovators: The Case of Banking Services,” Research Policy 40, no. 6 (July 2011): 806-818.
9. Google SketchUp CAD software can be downloaded for free at http://sketchup.google.com.
10. For example, explore services offered by Shapeways.com at http://shapeways.com.
11. S. Ogawa and F. Piller, “Reducing the Risks of New Product Development,” MIT Sloan Management Review 47, no. 2 (winter 2006): 65-71.
12. Lead user project handbooks and videos are available for free download from http://mit.edu/evhippel/www/teaching.htm.
13. L.B. Jeppesen and K.R. Lakhani, “Marginality and Problem-Solving Effectiveness in Broadcast Search,” Organization Science 21, no. 5 (September-October 2010): 1016-1033.
14. G.L. Lilien, P.D. Morrison, K. Searls, M. Sonnack and E. von Hippel, “Performance Assessment of the Lead User Idea-Generation Process for New Product Development,” Management Science 48, no. 8 (August 2002): 1042-1059, table 1.
15. For examples of user innovation activity associated with the Kinect, see P. Wayner, “With a Wave of the Hand, Improvising on Kinect,” New York Times, July 21, 2011, p. B8.
16. R. Prügl and N. Franke, “Factors Impacting the Success of Toolkits for User Innovation and Design: A Test of Toolkit Characteristics and Complementary User-Community Activities in the Computer Gaming Industry,” working paper, Vienna University of Economics, 2005.
17. Baldwin and von Hippel, “Modeling a Paradigm Shift.”
i. von Hippel, de Jong and Flowers, “Comparing Business and Household Sector Innovation in Consumer Products.” Flowers, von Hippel, de Jong and Sinozic, “Measuring User Innovation in the UK.”
ii. Ogawa and Pongtanalert, “Visualizing Invisible Innovation Content.”