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English: Reproduction of Figure 2.c. "Condorcet Efficiency under Spatial-Model Assumptions (201 voters, two dimensions, correlation = .5, relative dispersion = 1.0)" from A Comparison of Efficiency of Multicandidate Electoral Systems, Samuel Merrill III 1984[1]
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Data
Digitized from the plot:
2
3
4
5
7
Black
100.0
100.0
100.0
100.0
100.0
Coombs
100.0
99.1
98.1
97.1
93.1
Borda
100.0
91.0
87.1
86.0
84.0
Approval
100.0
86.0
77.1
74.0
66.0
IRV
100.0
94.1
88.1
78.0
66.0
Runoff
100.0
94.1
88.1
80.1
64.0
FPTP
100.0
79.1
68.9
57.0
50.0
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↑Merrill, Samuel (1984). "A Comparison of Efficiency of Multicandidate Electoral Systems". American Journal of Political Science28 (1): 23–48. DOI:10.2307/2110786. ISSN 0092-5853.
Annotations
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471
99
70
14
567
319
Black's method
473
135
71
16
567
319
Borda count
472
206
71
17
567
319
First-past-the-post
471
152
88
18
567
319
Approval voting
471
171
61
13
567
319
Instant-runoff voting
468
186
82
17
567
319
Two-round system
471
117
87
15
567
319
Coombs' method
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