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CHAPTER 6. ANALYZING THE TALK.ABORTION NEWSGROUP 82 300 Figure 6.4: Threads Starting, Ending and Continuing by Day 250 200 Number 150 100 50 Mean = 102.23 Median = 97.00 0 0 50 100 150 200 250 300 350 Day 300 Threads Started 200 Threads Ended Number 250 200 150 100 Mean = 13.27 Median = 11.00 50 0 0 100 200 300 Day 200 Continuing Threads Number 150 100 50 Mean = 13.27 Median = 12.00 0 0 100 200 300 Day 200 Single−Day Threads Number 150 100 50 Mean = 57.63 Median = 54.00 Number 150 100 50 Mean = 18.06 Median = 17.00 0 0 100 200 300 Day 0 0 100 200 300 Day
CHAPTER 6. ANALYZING THE TALK.ABORTION NEWSGROUP 83 Figure 6.5: Concentration of Authorship 0.9 0.8 Cumulative Percent of Posts 0.7 0.6 0.5 0.4 0.3 0.2 0.1 Gini Coefficient=.44 0 0 500 1000 1500 2000 2500 Authors measure of concentration is the entropy coefficient, useful when accurate data summarizing participation is available for all participants (Scherer 1980, 57). 6 In this formulation, the value of E if participation among all participants was equal would be log 2 N, or 11.55. The entropy coefficient for the talk.abortion newsgroup is calculated as .67, also indicating a high level of concentration. Regardless of the measurement technique, it is clear that the level of concentration in the talk.abortion newsgroup is extraordinarily high. Neuman (1991) provides concentration curves summarizing the top 100 films ranked by box-office gross, the top television markets ranked by size of market, and the top 200 book publishers in order of percentage of shipments. In all three cases, the levels of concentration are considerably less than shown in the case of this newsgroup. The evidence of concentration makes clear that participation in talk.abortion is not equal. The newsgroup is clearly dominated by a small group of 15 authors, who combined account for about 45 of the messages written. Participation is equal, however, when measured by length of message. The av- 6 Entropy is calculated as E = P N i=1 S i log 2 (1=S i) where S i is the percentage of total participation of the i th participant.
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Expanding the Public Sphere through
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Contents Acknowledgements 7 1 Compu
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List of Figures 3.1 Structure of a
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Acknowledgements When one takes eig
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CHAPTER 1. COMPUTERS, CONVERSATION
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CHAPTER 2. THE PUBLIC SPHERE 15 2.1
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CHAPTER 2. THE PUBLIC SPHERE 17 Sch
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CHAPTER 2. THE PUBLIC SPHERE 19 sta
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CHAPTER 2. THE PUBLIC SPHERE 21 or
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CHAPTER 2. THE PUBLIC SPHERE 23 own
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CHAPTER 2. THE PUBLIC SPHERE 25 new
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CHAPTER 2. THE PUBLIC SPHERE 27 com
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CHAPTER 2. THE PUBLIC SPHERE 29 Hab
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Page 45 and 46: CHAPTER 3. TECHNOLOGY & THE PUBLIC
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Page 103 and 104: CHAPTER 7. THE EXPANDING PUBLIC SPH
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APPENDIX A. TALK.ABORTION: AUGUST 9
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Appendix B Density Scores Table B.1
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APPENDIX B. DENSITY SCORES 165 Tabl
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Appendix C Supplemental Analysis 16
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APPENDIX C. SUPPLEMENTAL ANALYSIS 1
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BIBLIOGRAPHY 177 Best, Michael L. 1
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BIBLIOGRAPHY 179 Fisher, Bonnie, Mi
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BIBLIOGRAPHY 181 Hiltz, Starr Roxan
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BIBLIOGRAPHY 183 Mansbridge, Jane.
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BIBLIOGRAPHY 185 Pateman, Carole. 1
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BIBLIOGRAPHY 187 Savicki, Victor, D
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BIBLIOGRAPHY 189 U. S. Congress, Of
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