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Network Dynamics and Field Evolution:
The Growth of Interorganizational Collaboration in the Life Science

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04/23/2001


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Walter W. Powell, Douglas R. White, Kenneth W. Koput, & Jason Owen-Smith (2002)
"Practicing Polygamy with Good Taste: The Evolution of Inter-Organizational Collaboration In the Life Sciences." Working Paper, Stanford University.(2002)


Table of Contents 2001 Movie

The Evolution of Biotechnology as a Knowledge Industry:
Network Movies and Dynamic Analyses of Emergent Structure

Network Movie: 1988-99

PPT Slide

1989: Nucleus of

1990: Massive

1991: The phase

1992: ...and then

1993:

1994:

1995:

1996:

1997:

1998:

1999:

Figure 1: Levels of Network Cohesion: Tricomponents (within dark/red circles) embedded in Bicomponents (circled in medium/green) within Components (in light/yellow circles)

Figure 2: Slow Transitions to Giant Components, 1990-1994

Figure 3: Rapid Phase Transition in Bicomponent Growth

Figure 4: Degree(+1) Distributions for the 1-Mode Data

Figure 5 a: Degree(+1) Distributions for the 2-Mode Data

Figure 5 b : Degree(+1) Distributions for the 2-Mode Data (removing zero frequency counts)

Figure 5 c: Exponential for DBFs' degree choosing partners; power-law for partners degree chosen by DBFs

Figure 6: Scatterplot of Biotech degree as chosen by other Biotechs (1-Mode) and as chosers of 2-Mode Partners (v2log=.55+0.52v1og; R-Square=0.15)

Figure 7: The Sexta-component of R&D and Finance Contracts in the Biotech Industry Blue=Biotech, Size of nodes reflects number of finance ties. Brown=government Orange=Research Institutes and Universities Yellow=Pharmaceuticals (f=DBF p=partners)

Figure 7: The Sexta-component of R&D and Finance Contracts in the Biotech Industry Blue=Biotech, Size of nodes reflects number of finance ties. Brown=government Orange=Research Institutes and Universities Yellow=Pharmaceuticals (f=DBF p=partners)

Figure 8: 1988

Figure 8: 1989

Figure 8: 1990

Figure 8: 1991

Figure G1: Time Series of Growth Parameters: Mean Growth by Tie Activity, Separately for Form of Partners.

Figure G2: Time Series of Growth Parameters: Mean Growth by Partner Form, Separately for Type of Activity.

Figure G2: Time Series of Growth Parameters: Mean Growth by Partner Form, Separately for Type of Activity.

Figure G1: Time Series of Growth Parameters: Mean Growth by Tie Activity, Separately for Form of Partners.

Figure 9: Cycles of Learning and Organizational Returns (Powell et al. 1999)

Figure 10 a: Finance and R&D networks of 2219 organizations 1988-1991

Figure 10 b: Finance and R&D networks of 2219 organizations 1992-1995

Figure 10 c: Finance and R&D networks of 2219 organizations 1996-1999

Figure 11: Distance from NIH: R&D and Finance

Movie Author: Douglas R. White

Email: drwhite@uci.edu

Home Page: eclectic.ss.uci.edu

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