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Ranked pairs

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In Highest median, Ranked Pairs, and Schulze voting, there is always a regret-free, semi-honest ballot for any voter, holding all other ballots constant and assuming they know enough about how others will vote. Under such circumstances, there is always at least one way for a voter to participate
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At the end of this procedure, all cycles will be eliminated, leaving a unique winner who wins all of the remaining one-on-one matchups. The lack of cycles means that candidates can be ranked directly based on the matchups that have been left behind.
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Rather than crossing out near-ties, step 3 is sometimes described as going down the list and confirming ("locking in") the largest victories that do not create a cycle, then ignoring any victories that are not
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A randomly chosen ballot determines winner. This and closely related methods are of mathematical interest and included here to demonstrate that even unreasonable methods can pass voting method criteria.
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Majority Judgment fails the mutual majority criterion, but satisfies the criterion if the majority ranks the mutually favored set above a given absolute grade and all others below that grade.
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In this example, Nashville is the winner using the ranked-pairs procedure. Nashville is followed by Chattanooga, Knoxville, and Memphis in second, third, and fourth places respectively.
999:—a rock-paper-scissors-like sequence A > B > C > A—the cycle is broken by dropping the "weakest" elections in the cycle, i.e. the ones that are closest to being tied. 952: 1464:
The votes are then sorted. The largest majority is "Chattanooga over Knoxville"; 83% of the voters prefer Chattanooga. Thus, the pairs from above would be sorted this way:
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Every "lock in" would add another arrow to the graph showing the relationship between the candidates. Here is the final graph (where arrows point away from the winner).
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Majority Judgment may elect a candidate uniquely least-preferred by over half of voters, but it never elects the candidate uniquely bottom-rated by over half of voters.
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and some other systems, Memphis would have won the election by having the most people, even though Nashville won every simulated pairwise election outright. Using
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Where a winner is randomly chosen from the candidates, sortition is included to demonstrate that even non-voting methods can pass some criteria.
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A variant of Minimax that counts only pairwise opposition, not opposition minus support, fails the Condorcet criterion and meets later-no-harm.
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Approval voting, score voting, and majority judgment satisfy IIA if it is assumed that voters rate candidates independently using their own
844: 3959: 3916: 1667:(ISDA). It says that if one candidate (X) wins an election, and a new alternative (Y) is added, X will win the election if Y is not in the 95: 3599: 938: 3330: 1063: 839: 3784: 3730: 3261: 1624: 829: 579: 550: 490: 3582: 3911: 561: 86: 3934: 3710: 624: 266: 251: 236: 3753: 3738: 3557: 3222: 1056: 882: 502: 425: 346: 3804: 3527: 3517: 3378: 1604: 314: 296: 137: 867: 1392:
indicates voters who preferred the candidate listed in the row caption to the candidate listed in the column caption
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indicates voters who preferred the candidate listed in the column caption to the candidate listed in the row caption
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in this example would result in Knoxville winning even though more people preferred Nashville over Knoxville.
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the election; this will be the election(s) in the cycle with the smallest margin of victory (near-ties).
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In this case, no cycles are created by any of the pairs, so every single one is locked in.
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The following table compares ranked pairs with other single-winner election methods:
1660: 995:; if such a candidate exists, they are immediately elected. Otherwise, if there is a 977: 782: 482: 270: 108: 71: 46: 3234: 991:, where the one-on-one margins of victory for each candidate are compared to find a 3502: 2786: 522: 286: 279: 1532:
The pairs are then locked in order, skipping any pairs that would create a cycle:
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In the example election, the winner is Nashville. This would be true for any
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without grading any less-preferred candidate above any more-preferred one.
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Going down the list, check whether adding each matchup would create a
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All voters want the capital to be as close to them as possible.
3257:"The best Condorcet-compatible election method: Ranked Pairs" 1647:, meaning it is likely to roughly satisfy IIA "in practice." 57: 3312:
A margin-based PHP Implementation of Tideman's Ranked Pairs
1106:, the largest city, but far from the others (42% of voters) 1095:. The population is concentrated around four major cities. 3176:"Independence of clones as a criterion for voting rules" 1011:
Consider each pair of candidates round-robin style, and
3053: 3051: 3049: 1022:) margin of victory, going from largest to smallest. 3904: 3858: 3762: 3729: 3676: 3641: 3608: 3535: 3526: 3377: 1242: 1401:First, list every pair, and determine the winner: 3102: 3100: 1112:, near the center of the state (26% of voters) 1091:is holding an election on the location of its 3338: 1641:local independence of irrelevant alternatives 1128:The preferences of each region's voters are: 1064: 946: 8: 3795:Independence of Smith-dominated alternatives 3294:Descriptions of ranked-ballot voting methods 1665:independence of Smith-dominated alternatives 1645:independence of Smith-dominated alternatives 1685:Comparison of single-winner voting systems 3532: 3345: 3331: 3323: 1683: 1403: 1071: 1057: 1007:The ranked pairs procedure is as follows: 953: 939: 29: 3274: 3227:Voting matters (www.votingmatters.org.uk) 3089: 3087: 3085: 1671:. ISDA implies the Condorcet criterion. 1466: 1130: 1013:calculate the pairwise margin of victory 3790:Independence of irrelevant alternatives 3568:Sequential proportional approval voting 3166: 3145: 3000: 2994: 1657:independence of irrelevant alternatives 1651:Independence of irrelevant alternatives 45: 1637:independent of irrelevant alternatives 1494:Nashville (68%) vs. Chattanooga (32%) 1478:Chattanooga (83%) vs. Knoxville (17%) 1455:Chattanooga (83%) vs. Knoxville (17%) 1439:Nashville (68%) vs. Chattanooga (32%) 1240:The results are tabulated as follows: 1124:, far to the northeast (17% of voters) 1603:, the ranked pairs method passes the 7: 1510:Memphis (42%) vs. Chattanooga (58%) 1486:Nashville (68%) vs. Knoxville (32%) 1447:Nashville (68%) vs. Knoxville (32%) 1423:Memphis (42%) vs. Chattanooga (58%) 3600:Indirect single transferable voting 3317:Rust implementation of Ranked Pairs 1635:. While ranked pairs is not fully 1518:Memphis (42%) vs. Knoxville (58%) 1502:Memphis (42%) vs. Nashville (58%) 1431:Memphis (42%) vs. Knoxville (58%) 1415:Memphis (42%) vs. Nashville (58%) 25: 3233:. McDougall Trust. Archived from 1015:for each in a one-on-one matchup. 3262:Constitutional Political Economy 3221:Schulze, Markus (October 2003). 1625:independence of clones criterion 1561: 1542:Lock Nashville over Chattanooga. 1536:Lock Chattanooga over Knoxville. 1080: 922: 909: 897: 845:McKelvey–Schofield chaos theorem 491:Semi-proportional representation 123:First preference plurality (FPP) 3965:Single-winner electoral systems 1376: 1370: 1364: 1359: 1351: 1343: 1337: 1332: 1324: 1318: 1310: 1305: 1297: 1291: 1285: 1278: 1271: 1266: 1261: 1256: 1118:, somewhat east (15% of voters) 3711:Mixed ballot transferable vote 1548:Lock Chattanooga over Memphis. 1539:Lock Nashville over Knoxville. 883:Harsanyi's utilitarian theorem 840:Moulin's impossibility theorem 805:Conflicting majorities paradox 27:Single-winner electoral system 1: 3174:Tideman, T. N. (1987-09-01). 709:Frustrated majorities paradox 3912:Comparison of voting systems 3754:Satisfaction approval voting 3739:Single non-transferable vote 3558:Proportional approval voting 1551:Lock Knoxville over Memphis. 1545:Lock Nashville over Memphis. 993:majority-preferred candidate 878:Condorcet dominance theorems 818:Social and collective choice 18:Maximize Affirmed Majorities 3960:Monotonic Condorcet methods 3518:Graduated majority judgment 3255:Munger, Charles T. (2022). 987:Ranked pairs begins with a 544:By mechanism of combination 315:Proportional representation 3981: 3770:Condorcet winner criterion 3461:First-past-the-post voting 3276:10.1007/s10602-022-09382-w 2998: 1244:Pairwise election results 742:Multiple districts paradox 473:Fractional approval voting 461:Interactive representation 3925: 3917:Voting systems by country 3820:Mutual majority criterion 3775:Condorcet loser criterion 3721:Vote linkage mixed system 3633:Largest remainders method 3360: 3300:Example JS implementation 3180:Social Choice and Welfare 3023:is incompatible with the 1627:. Ranked pairs fails the 1621:Condorcet loser criterion 1154: 1147: 1140: 1133: 689:Paradoxes and pathologies 538:Mixed-member proportional 533:Mixed-member majoritarian 528:By results of combination 419:Approval-based committees 3810:Majority loser criterion 3696:Additional member system 3654:Hagenbach-Bischoff quota 3573:Single transferable vote 3498:Positional voting system 3434:Minimax Condorcet method 3392:Combined approval voting 868:Condorcet's jury theorem 669:Double simultaneous vote 644:Rural–urban proportional 639:Dual-member proportional 601: 590: 557:Parallel (superposition) 449:Fractional social choice 436:Expanding approvals rule 265: 250: 235: 166: 155: 131: 3835:Resolvability criterion 3825:Participation criterion 3800:Later-no-harm criterion 3616:Highest averages method 1633:participation criterion 1018:Sort the pairs by the ( 795:Tyranny of the majority 572:Fusion (majority bonus) 389:Quota-remainder methods 3876:First-preference votes 3815:Monotonicity criterion 3785:Independence of clones 3488:Simple majoritarianism 1609:monotonicity criterion 989:round-robin tournament 929:Mathematics portal 835:Majority impossibility 824:Impossibility theorems 620:Negative vote transfer 441:Method of equal shares 62: 3780:Consistency criterion 3701:Alternative vote plus 3466:Instant-runoff voting 3306:Pair Ranking Ruby Gem 3021:Condorcet's criterion 1661:ranked voting systems 1639:, it still satisfies 1629:consistency criterion 1589:instant-runoff voting 732:Best-is-worst paradox 721:Pathological response 456:Direct representation 109:Single-winner methods 61: 3850:Seats-to-votes ratio 3621:Webster/Sainte-LaguĂ« 1776:No favorite betrayal 916:Economics portal 863:Median voter theorem 82:Comparative politics 3830:Plurality criterion 3429:Kemeny–Young method 2945:Tideman alternative 1686: 1655:Ranked pairs fails 1617:Condorcet criterion 1615:(which implies the 1585:first-past-the-post 1245: 904:Politics portal 615:Vote linkage system 586:Seat linkage system 173:Ranked-choice (RCV) 3871:Election threshold 3805:Majority criterion 3481:Supplementary vote 3192:10.1007/BF00433944 1684: 1605:majority criterion 1243: 980:first proposed by 800:Discursive dilemma 759:Lesser evil voting 634:Supermixed systems 337:Largest remainders 195:Round-robin voting 63: 3955:Electoral systems 3942: 3941: 3840:Reversal symmetry 3749:Cumulative voting 3731:Semi-proportional 3706:Mixed single vote 3672: 3671: 3548:Mixed single vote 3456:Exhaustive ballot 3419:Copeland's method 3414:Condorcet methods 3354:Electoral systems 3132: 3131: 1659:, like all other 1525: 1524: 1462: 1461: 1458:Chattanooga: 83% 1386: 1385: 1237: 1236: 1159: 1152: 1145: 1138: 1099:The options are: 963: 962: 850:Gibbard's theorem 790:Dominance paradox 727:Perverse response 431:Phragmen's method 297:Majority judgment 225:Positional voting 183:Condorcet methods 51:electoral systems 16:(Redirected from 3972: 3881:Liquid democracy 3533: 3513:Two-round system 3424:Dodgson's method 3347: 3340: 3333: 3324: 3281: 3280: 3278: 3252: 3246: 3245: 3243: 3242: 3218: 3212: 3211: 3171: 3154: 3150: 3125: 3122: 3116: 3113: 3107: 3104: 3095: 3091: 3080: 3077: 3071: 3068: 3062: 3055: 3044: 3041:sincere favorite 3018: 2842: 2813: 2769: 2664: 2578: 2457: 2432: 2296: 2286: 2270: 2266: 1888:Appr­ovals 1867: 1778: 1772: 1766: 1749:Clone­proof 1745: 1735: 1729: 1718: 1716:Condorcet winner 1687: 1675:Comparison table 1578:Condorcet method 1565: 1513:Chattanooga 58% 1481:Chattanooga 83% 1467: 1426:Chattanooga 58% 1404: 1246: 1157: 1150: 1143: 1136: 1131: 1084: 1073: 1066: 1059: 982:Nicolaus Tideman 974:tournament-style 955: 948: 941: 927: 926: 914: 913: 902: 901: 857:Positive results 752:Strategic voting 649:Majority jackpot 606: 595: 466:Liquid democracy 342:National remnant 332:Highest averages 269: 254: 239: 171: 162:Alternative vote 160: 144:Partisan primary 136: 77:Mechanism design 30: 21: 3980: 3979: 3975: 3974: 3973: 3971: 3970: 3969: 3945: 3944: 3943: 3938: 3921: 3900: 3854: 3845:Smith criterion 3758: 3725: 3686:Parallel voting 3668: 3664:Imperiali quota 3637: 3604: 3522: 3476:Contingent vote 3439:Nanson's method 3397:Unified primary 3387:Approval voting 3373: 3356: 3351: 3319:by Cory Dickson 3290: 3285: 3284: 3254: 3253: 3249: 3240: 3238: 3220: 3219: 3215: 3173: 3172: 3168: 3163: 3158: 3157: 3151: 3147: 3142: 3136: 3134: 3133: 3128: 3123: 3119: 3114: 3110: 3105: 3098: 3092: 3083: 3078: 3074: 3069: 3065: 3056: 3047: 3019: 3002: 1782: 1722:Condorcet loser 1711:Mutual majority 1697: 1695: 1694: 1692: 1677: 1653: 1613:Smith criterion 1601:voting criteria 1597: 1574: 1530: 1399: 1254: 1251: 1239: 1156: 1149: 1142: 1135: 1078: 1077: 1049: 1044: 1029:. If it would, 1005: 997:Condorcet cycle 959: 921: 920: 908: 896: 888: 887: 854: 830:Arrow's theorem 820: 810: 809: 778: 748: 737:No-show paradox 718: 704:Cloning paradox 694:Spoiler effects 691: 681: 680: 655: 542: 525: 515: 514: 487: 478:Maximal lottery 445: 426:Thiele's method 415: 385: 317: 307: 306: 292:Approval voting 280:Cardinal voting 276: 221: 215:Maximal lottery 179: 111: 101: 28: 23: 22: 15: 12: 11: 5: 3978: 3976: 3968: 3967: 3962: 3957: 3947: 3946: 3940: 3939: 3926: 3923: 3922: 3920: 3919: 3914: 3908: 3906: 3902: 3901: 3899: 3898: 3893: 3888: 3883: 3878: 3873: 3868: 3862: 3860: 3856: 3855: 3853: 3852: 3847: 3842: 3837: 3832: 3827: 3822: 3817: 3812: 3807: 3802: 3797: 3792: 3787: 3782: 3777: 3772: 3766: 3764: 3760: 3759: 3757: 3756: 3751: 3746: 3744:Limited voting 3741: 3735: 3733: 3727: 3726: 3724: 3723: 3718: 3713: 3708: 3703: 3698: 3693: 3688: 3682: 3680: 3674: 3673: 3670: 3669: 3667: 3666: 3661: 3656: 3651: 3645: 3643: 3639: 3638: 3636: 3635: 3630: 3629: 3628: 3623: 3612: 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1978: 1975: 1972: 1969: 1966: 1963: 1960: 1957: 1954: 1951: 1948: 1942: 1941: 1940:Ran­king 1938: 1935: 1932: 1929: 1926: 1923: 1920: 1917: 1914: 1911: 1908: 1905: 1902: 1899: 1896: 1890: 1889: 1886: 1883: 1880: 1877: 1874: 1871: 1868: 1864: 1861: 1858: 1855: 1852: 1849: 1846: 1843: 1837: 1836: 1833: 1830: 1827: 1824: 1821: 1818: 1815: 1812: 1809: 1806: 1803: 1800: 1797: 1794: 1791: 1789:Anti-plurality 1785: 1784: 1779: 1773: 1767: 1761: 1756: 1754:Mono­tone 1751: 1746: 1736: 1730: 1724: 1719: 1713: 1708: 1706:Majority loser 1703: 1698: 1693: 1690: 1682: 1681: 1676: 1673: 1652: 1649: 1599:Of the formal 1596: 1593: 1573: 1570: 1553: 1552: 1549: 1546: 1543: 1540: 1537: 1529: 1526: 1523: 1522: 1521:Knoxville 58% 1519: 1515: 1514: 1511: 1507: 1506: 1505:Nashville 58% 1503: 1499: 1498: 1497:Nashville 68% 1495: 1491: 1490: 1489:Nashville 68% 1487: 1483: 1482: 1479: 1475: 1474: 1471: 1460: 1459: 1456: 1452: 1451: 1450:Nashville 68% 1448: 1444: 1443: 1442:Nashville 68% 1440: 1436: 1435: 1434:Knoxville 58% 1432: 1428: 1427: 1424: 1420: 1419: 1418:Nashville 58% 1416: 1412: 1411: 1408: 1398: 1395: 1394: 1393: 1390: 1384: 1383: 1381: 1375: 1369: 1363: 1357: 1356: 1350: 1348: 1342: 1336: 1330: 1329: 1323: 1317: 1315: 1309: 1303: 1302: 1296: 1290: 1284: 1282: 1276: 1275: 1270: 1265: 1260: 1255: 1252: 1249: 1235: 1234: 1233: 1232: 1229: 1226: 1223: 1216: 1215: 1214: 1211: 1208: 1205: 1198: 1197: 1196: 1193: 1190: 1187: 1180: 1179: 1178: 1175: 1172: 1169: 1161: 1160: 1153: 1146: 1139: 1126: 1125: 1119: 1113: 1107: 1076: 1075: 1068: 1061: 1053: 1052: 1048: 1045: 1043: 1040: 1035: 1034: 1023: 1016: 1004: 1001: 961: 960: 958: 957: 950: 943: 935: 932: 931: 919: 918: 906: 893: 890: 889: 886: 885: 880: 875: 870: 865: 853: 852: 847: 842: 837: 832: 821: 816: 815: 812: 811: 808: 807: 802: 797: 792: 777: 776: 774:Turkey-raising 771: 766: 761: 747: 746: 745: 744: 734: 729: 717: 716: 714:Center squeeze 711: 706: 701: 699:Spoiler effect 692: 687: 686: 683: 682: 679: 678: 673: 672: 671: 658:By ballot type 654: 653: 652: 651: 646: 641: 631: 630: 629: 628: 627: 622: 612: 611: 610: 599: 576: 575: 574: 569: 564: 559: 541: 540: 535: 526: 521: 520: 517: 516: 513: 512: 510:Limited voting 507: 506: 505: 486: 485: 480: 475: 470: 469: 468: 463: 444: 443: 438: 433: 428: 414: 413: 408: 403: 398: 384: 383: 382: 381: 379:Localized list 376: 371: 366: 361: 351: 350: 349: 347:Biproportional 344: 339: 334: 318: 313: 312: 309: 308: 305: 304: 299: 294: 289: 275: 274: 259: 244: 220: 219: 218: 217: 212: 207: 202: 192: 178: 177: 176: 175: 164: 151:Instant-runoff 148: 147: 146: 138:Jungle primary 125: 114:Single vote - 112: 107: 106: 103: 102: 100: 99: 89: 84: 79: 74: 68: 65: 64: 54: 53: 43: 42: 26: 24: 14: 13: 10: 9: 6: 4: 3: 2: 3977: 3966: 3963: 3961: 3958: 3956: 3953: 3952: 3950: 3937: 3936: 3931: 3930: 3924: 3918: 3915: 3913: 3910: 3909: 3907: 3903: 3897: 3894: 3892: 3889: 3887: 3884: 3882: 3879: 3877: 3874: 3872: 3869: 3867: 3864: 3863: 3861: 3857: 3851: 3848: 3846: 3843: 3841: 3838: 3836: 3833: 3831: 3828: 3826: 3823: 3821: 3818: 3816: 3813: 3811: 3808: 3806: 3803: 3801: 3798: 3796: 3793: 3791: 3788: 3786: 3783: 3781: 3778: 3776: 3773: 3771: 3768: 3767: 3765: 3761: 3755: 3752: 3750: 3747: 3745: 3742: 3740: 3737: 3736: 3734: 3732: 3728: 3722: 3719: 3717: 3714: 3712: 3709: 3707: 3704: 3702: 3699: 3697: 3694: 3692: 3689: 3687: 3684: 3683: 3681: 3679: 3675: 3665: 3662: 3660: 3657: 3655: 3652: 3650: 3647: 3646: 3644: 3640: 3634: 3631: 3627: 3624: 3622: 3619: 3618: 3617: 3614: 3613: 3611: 3607: 3601: 3598: 3596: 3593: 3589: 3586: 3584: 3581: 3579: 3576: 3575: 3574: 3571: 3569: 3566: 3564: 3561: 3559: 3556: 3554: 3551: 3549: 3546: 3544: 3541: 3540: 3538: 3534: 3531: 3529: 3525: 3519: 3516: 3514: 3511: 3509: 3506: 3504: 3501: 3499: 3496: 3494: 3491: 3489: 3486: 3482: 3479: 3477: 3474: 3472: 3469: 3468: 3467: 3464: 3462: 3459: 3457: 3454: 3450: 3447: 3445: 3442: 3440: 3437: 3435: 3432: 3430: 3427: 3425: 3422: 3420: 3417: 3416: 3415: 3412: 3410: 3407: 3405: 3402: 3398: 3395: 3393: 3390: 3389: 3388: 3385: 3384: 3382: 3380: 3379:Single-winner 3376: 3372: 3370: 3366: 3359: 3355: 3348: 3343: 3341: 3336: 3334: 3329: 3328: 3325: 3318: 3315: 3313: 3310: 3307: 3304: 3301: 3298: 3295: 3292: 3291: 3287: 3277: 3272: 3268: 3264: 3263: 3258: 3251: 3248: 3237:on 2020-07-11 3236: 3232: 3228: 3224: 3217: 3214: 3209: 3205: 3201: 3197: 3193: 3189: 3185: 3181: 3177: 3170: 3167: 3160: 3149: 3146: 3139: 3137: 3121: 3118: 3112: 3109: 3103: 3101: 3097: 3090: 3088: 3086: 3082: 3076: 3073: 3067: 3064: 3060: 3054: 3052: 3050: 3046: 3042: 3038: 3037:later-no-help 3034: 3033:later-no-harm 3030: 3029:participation 3026: 3022: 3017: 3015: 3013: 3011: 3009: 3007: 3005: 3001: 2995: 2990: 2987: 2984: 2981: 2978: 2975: 2972: 2969: 2966: 2963: 2960: 2957: 2954: 2951: 2948: 2946: 2943: 2942: 2938: 2935: 2932: 2929: 2926: 2923: 2920: 2917: 2914: 2911: 2908: 2905: 2902: 2899: 2896: 2894: 2891: 2890: 2886: 2883: 2880: 2877: 2874: 2871: 2868: 2865: 2862: 2859: 2856: 2853: 2850: 2847: 2844: 2841: 2838: 2837: 2833: 2830: 2827: 2824: 2821: 2818: 2815: 2811: 2808: 2805: 2802: 2799: 2796: 2793: 2790: 2788: 2785: 2784: 2780: 2777: 2774: 2771: 2767: 2764: 2761: 2758: 2755: 2752: 2749: 2746: 2743: 2740: 2737: 2735: 2732: 2731: 2727: 2724: 2721: 2718: 2715: 2712: 2709: 2706: 2703: 2700: 2697: 2694: 2691: 2688: 2685: 2683: 2680: 2679: 2675: 2672: 2669: 2666: 2662: 2659: 2656: 2653: 2650: 2647: 2644: 2641: 2638: 2635: 2632: 2630: 2627: 2626: 2622: 2619: 2616: 2613: 2610: 2607: 2604: 2601: 2598: 2595: 2592: 2589: 2586: 2583: 2580: 2577: 2576:Random ballot 2574: 2573: 2569: 2566: 2563: 2560: 2557: 2554: 2551: 2548: 2545: 2542: 2539: 2536: 2533: 2530: 2527: 2525: 2522: 2521: 2517: 2514: 2511: 2508: 2505: 2502: 2499: 2496: 2493: 2490: 2487: 2484: 2481: 2478: 2475: 2473: 2470: 2469: 2465: 2462: 2459: 2455: 2452: 2449: 2446: 2443: 2440: 2437: 2434: 2430: 2427: 2424: 2421: 2419: 2416: 2415: 2411: 2408: 2405: 2402: 2399: 2396: 2393: 2390: 2387: 2384: 2381: 2378: 2375: 2372: 2369: 2367: 2364: 2363: 2359: 2356: 2353: 2350: 2347: 2344: 2341: 2338: 2335: 2332: 2329: 2326: 2323: 2320: 2317: 2315: 2312: 2311: 2307: 2304: 2301: 2298: 2294: 2291: 2288: 2284: 2281: 2278: 2275: 2272: 2268: 2264: 2261: 2259: 2256: 2255: 2251: 2248: 2245: 2242: 2239: 2236: 2233: 2230: 2227: 2224: 2221: 2218: 2215: 2212: 2209: 2207: 2204: 2203: 2199: 2196: 2193: 2190: 2187: 2184: 2181: 2178: 2175: 2172: 2169: 2166: 2163: 2160: 2157: 2155: 2152: 2151: 2147: 2144: 2141: 2138: 2135: 2132: 2129: 2126: 2123: 2120: 2117: 2114: 2111: 2108: 2105: 2103: 2100: 2099: 2095: 2092: 2089: 2086: 2083: 2080: 2077: 2074: 2071: 2068: 2065: 2062: 2059: 2056: 2053: 2051: 2048: 2047: 2043: 2040: 2037: 2034: 2031: 2028: 2025: 2022: 2019: 2016: 2013: 2010: 2007: 2004: 2001: 1999: 1996: 1995: 1991: 1988: 1985: 1982: 1979: 1976: 1973: 1970: 1967: 1964: 1961: 1958: 1955: 1952: 1949: 1947: 1944: 1943: 1939: 1936: 1933: 1930: 1927: 1924: 1921: 1918: 1915: 1912: 1909: 1906: 1903: 1900: 1897: 1895: 1892: 1891: 1887: 1884: 1881: 1878: 1875: 1872: 1869: 1865: 1862: 1859: 1856: 1853: 1850: 1847: 1844: 1842: 1839: 1838: 1834: 1831: 1828: 1825: 1822: 1819: 1816: 1813: 1810: 1807: 1804: 1801: 1798: 1795: 1792: 1790: 1787: 1786: 1780: 1777: 1774: 1771: 1770:Later-no-help 1768: 1765: 1764:Later-no-harm 1762: 1760: 1759:Participation 1757: 1755: 1752: 1750: 1747: 1744: 1740: 1737: 1734: 1731: 1728: 1725: 1723: 1720: 1717: 1714: 1712: 1709: 1707: 1704: 1702: 1699: 1689: 1688: 1680: 1674: 1672: 1670: 1666: 1662: 1658: 1650: 1648: 1646: 1642: 1638: 1634: 1630: 1626: 1622: 1618: 1614: 1610: 1606: 1602: 1594: 1592: 1590: 1586: 1581: 1579: 1571: 1569: 1566: 1564: 1559: 1556: 1550: 1547: 1544: 1541: 1538: 1535: 1534: 1533: 1527: 1520: 1517: 1516: 1512: 1509: 1508: 1504: 1501: 1500: 1496: 1493: 1492: 1488: 1485: 1484: 1480: 1477: 1476: 1472: 1469: 1468: 1465: 1457: 1454: 1453: 1449: 1446: 1445: 1441: 1438: 1437: 1433: 1430: 1429: 1425: 1422: 1421: 1417: 1414: 1413: 1409: 1406: 1405: 1402: 1396: 1391: 1388: 1387: 1382: 1380: 1374: 1368: 1362: 1358: 1355: 1349: 1347: 1341: 1335: 1331: 1328: 1322: 1316: 1314: 1308: 1304: 1301: 1295: 1289: 1283: 1281: 1277: 1274: 1269: 1264: 1259: 1248: 1247: 1241: 1230: 1227: 1224: 1222: 1219: 1218: 1217: 1212: 1209: 1206: 1204: 1201: 1200: 1199: 1194: 1191: 1188: 1186: 1183: 1182: 1181: 1176: 1173: 1170: 1168: 1165: 1164: 1163: 1162: 1155:17% of voters 1148:15% of voters 1141:26% of voters 1134:42% of voters 1132: 1129: 1123: 1120: 1117: 1114: 1111: 1108: 1105: 1102: 1101: 1100: 1098: 1094: 1090: 1087:Suppose that 1085: 1083: 1074: 1069: 1067: 1062: 1060: 1055: 1054: 1051: 1047:The situation 1046: 1041: 1039: 1032: 1028: 1024: 1021: 1017: 1014: 1010: 1009: 1008: 1002: 1000: 998: 994: 990: 985: 983: 979: 978:ranked voting 975: 971: 967: 956: 951: 949: 944: 942: 937: 936: 934: 933: 930: 925: 917: 912: 907: 905: 900: 895: 894: 892: 891: 884: 881: 879: 876: 874: 873:May's theorem 871: 869: 866: 864: 861: 860: 859: 858: 851: 848: 846: 843: 841: 838: 836: 833: 831: 828: 827: 826: 825: 819: 814: 813: 806: 803: 801: 798: 796: 793: 791: 788: 787: 786: 785: 784: 783:majority rule 781:Paradoxes of 775: 772: 770: 767: 765: 762: 760: 757: 756: 755: 754: 753: 743: 740: 739: 738: 735: 733: 730: 728: 725: 724: 723: 722: 715: 712: 710: 707: 705: 702: 700: 697: 696: 695: 690: 685: 684: 677: 674: 670: 667: 666: 665: 662: 661: 660: 659: 650: 647: 645: 642: 640: 637: 636: 635: 632: 626: 623: 621: 618: 617: 616: 613: 609: 604: 600: 598: 593: 589: 588: 587: 584: 583: 582: 581: 577: 573: 570: 568: 565: 563: 560: 558: 555: 554: 553: 552: 547: 546: 545: 539: 536: 534: 531: 530: 529: 524: 523:Mixed systems 519: 518: 511: 508: 504: 501: 500: 499: 496: 495: 494: 493: 492: 484: 483:Random ballot 481: 479: 476: 474: 471: 467: 464: 462: 459: 458: 457: 454: 453: 452: 451: 450: 442: 439: 437: 434: 432: 429: 427: 424: 423: 422: 421: 420: 412: 409: 407: 404: 402: 399: 397: 394: 393: 392: 391: 390: 380: 377: 375: 372: 370: 367: 365: 362: 360: 357: 356: 355: 352: 348: 345: 343: 340: 338: 335: 333: 330: 329: 328: 327:Apportionment 325: 324: 323: 322: 316: 311: 310: 303: 300: 298: 295: 293: 290: 288: 285: 284: 283: 282: 281: 272: 268: 263: 262:Antiplurality 260: 257: 253: 248: 245: 242: 238: 233: 230: 229: 228: 227: 226: 216: 213: 211: 208: 206: 203: 201: 198: 197: 196: 193: 191: 190:Condorcet-IRV 188: 187: 186: 185: 184: 174: 169: 165: 163: 158: 154: 153: 152: 149: 145: 142: 141: 139: 134: 129: 126: 124: 121: 120: 119: 117: 110: 105: 104: 97: 93: 90: 88: 85: 83: 80: 78: 75: 73: 72:Social choice 70: 69: 67: 66: 60: 56: 55: 52: 48: 47:Social choice 44: 40: 36: 32: 31: 19: 3933: 3927: 3543:Mixed-member 3528:Proportional 3503:Score voting 3444:Ranked pairs 3443: 3363:Part of the 3362: 3266: 3260: 3250: 3239:. Retrieved 3235:the original 3230: 3226: 3216: 3183: 3179: 3169: 3148: 3135: 3120: 3111: 3075: 3066: 2996:Table Notes 2728:Single mark 2629:Ranked pairs 2628: 2623:Single mark 2570:Single mark 2366:Kemeny–Young 1835:Single mark 1678: 1654: 1598: 1582: 1575: 1567: 1560: 1557: 1554: 1531: 1463: 1400: 1378: 1372: 1366: 1360: 1353: 1345: 1339: 1333: 1326: 1320: 1312: 1306: 1299: 1293: 1287: 1279: 1272: 1267: 1262: 1257: 1238: 1225:Chattanooga 1220: 1202: 1189:Chattanooga 1184: 1174:Chattanooga 1166: 1127: 1086: 1079: 1050: 1036: 1006: 986: 969: 966:Ranked Pairs 965: 964: 856: 855: 822: 780: 779: 764:Exaggeration 750: 749: 720: 719: 693: 657: 656: 625:Mixed ballot 580:Compensatory 578: 551:compensatory 548: 543: 527: 489: 488: 447: 446: 417: 416: 387: 386: 374:List-free PR 319: 287:Score voting 278: 277: 223: 222: 210:Ranked pairs 209: 181: 180: 113: 3886:Spoilt vote 3649:Droop quota 3588:Schulze STV 3563:Rural–urban 3508:STAR voting 3404:Borda count 3025:consistency 1334:Chattanooga 1268:Chattanooga 1203:Chattanooga 1151:Center-East 1116:Chattanooga 664:Single vote 567:Conditional 562:Coexistence 411:Quota Borda 401:Schulze STV 359:Closed list 302:STAR voting 247:Borda count 3949:Categories 3905:Comparison 3659:Hare quota 3609:Allocation 3595:Spare vote 3583:Hare-Clark 3553:Party-list 3241:2021-02-02 3161:References 3153:locked-in. 2654:LIIA Only 2391:LIIA Only 1623:, and the 1228:Nashville 1210:Nashville 1207:Knoxville 1192:Knoxville 1177:Knoxville 1171:Nashville 976:system of 769:Truncation 498:Cumulative 321:Party-list 96:By country 87:Comparison 3896:Unseating 3891:Sortition 3493:Plurality 3369:Economics 3208:122758840 3200:1432-217X 3043:criteria. 2840:Sortition 2524:Plurality 1733:Smith-IIA 1691:Criterion 1669:Smith set 1361:Knoxville 1307:Nashville 1273:Knoxville 1263:Nashville 1221:Knoxville 1185:Nashville 1122:Knoxville 1110:Nashville 1089:Tennessee 1031:cross out 1003:Procedure 984:in 1987. 676:Dual-vote 369:Panachage 364:Open list 354:List type 232:Plurality 128:Two-round 116:plurality 39:Economics 3763:Criteria 3716:Scorporo 3365:politics 2154:Copeland 1841:Approval 1701:Majority 1631:and the 1595:Criteria 1231:Memphis 1213:Memphis 1195:Memphis 1158:Far-East 1137:Far-West 1020:absolute 396:Hare STV 35:Politics 33:A joint 3935:Project 3626:D'Hondt 3578:CPO-STV 3536:Systems 2939:Scores 2834:Scores 2734:Schulze 2418:Minimax 2308:Scores 2206:Dodgson 2050:Bucklin 1894:Baldwin 1781:Ballot 1619:), the 1572:Summary 1473:Winner 1410:Winner 1280:Memphis 1258:Memphis 1167:Memphis 1104:Memphis 1093:capital 1042:Example 972:) is a 406:CPO-STV 256:Baldwin 205:Schulze 200:Minimax 118:methods 3929:Portal 3866:Ballot 3642:Quotas 3371:series 3206:  3198:  3039:, and 2682:Runoff 2472:Nanson 2102:Coombs 1696:Method 1611:, the 1607:, the 1583:Under 1144:Center 271:Coombs 41:series 3859:Other 3678:Mixed 3204:S2CID 3140:Notes 2887:None 2787:Score 1998:Borda 1946:Black 1783:type 1727:Smith 1470:Pair 1407:Pair 1397:Tally 1027:cycle 608:'MMP' 597:'AMS' 3367:and 3196:ISSN 2973:Yes 2967:Yes 2964:Yes 2961:Yes 2958:Yes 2955:Yes 2952:Yes 2949:Yes 2924:Yes 2909:Yes 2900:Yes 2893:STAR 2884:Yes 2881:Yes 2878:Yes 2875:Yes 2872:Yes 2866:Yes 2831:Yes 2828:Yes 2822:Yes 2819:Yes 2816:Yes 2765:Yes 2762:Yes 2756:Yes 2753:Yes 2750:Yes 2747:Yes 2744:Yes 2741:Yes 2738:Yes 2722:Yes 2719:Yes 2698:Yes 2689:Yes 2686:Yes 2660:Yes 2657:Yes 2651:Yes 2648:Yes 2645:Yes 2642:Yes 2639:Yes 2636:Yes 2633:Yes 2620:Yes 2617:Yes 2614:Yes 2611:Yes 2608:Yes 2605:Yes 2602:Yes 2564:Yes 2561:Yes 2558:Yes 2555:Yes 2528:Yes 2491:Yes 2488:Yes 2485:Yes 2482:Yes 2479:Yes 2476:Yes 2450:Yes 2422:Yes 2397:Yes 2388:Yes 2385:Yes 2382:Yes 2379:Yes 2376:Yes 2373:Yes 2370:Yes 2354:Yes 2351:Yes 2342:Yes 2330:Yes 2324:Yes 2321:Yes 2318:Yes 2305:Yes 2302:Yes 2292:Yes 2289:Yes 2262:Yes 2219:Yes 2210:Yes 2185:Yes 2176:Yes 2173:Yes 2170:Yes 2167:Yes 2164:Yes 2161:Yes 2158:Yes 2145:Yes 2118:Yes 2112:Yes 2109:Yes 2106:Yes 2090:Yes 2081:Yes 2060:Yes 2057:Yes 2054:Yes 2038:Yes 2032:Yes 2029:Yes 2014:Yes 2005:Yes 1977:Yes 1962:Yes 1959:Yes 1953:Yes 1950:Yes 1913:Yes 1910:Yes 1907:Yes 1904:Yes 1901:Yes 1898:Yes 1885:Yes 1882:Yes 1876:Yes 1873:Yes 1870:Yes 1845:Yes 1832:Yes 1823:Yes 1820:Yes 1796:Yes 1743:LIIA 1643:and 1528:Lock 1379:17% 1377:83% 1373:32% 1371:68% 1367:58% 1365:42% 1354:83% 1352:17% 1346:32% 1344:68% 1340:58% 1338:42% 1327:68% 1325:32% 1321:68% 1319:32% 1313:58% 1311:42% 1300:42% 1298:58% 1294:42% 1292:58% 1288:42% 1286:58% 549:Non- 503:SNTV 92:List 49:and 37:and 3691:MMP 3271:doi 3188:doi 2988:No 2985:No 2982:No 2979:No 2976:No 2970:No 2936:No 2933:No 2930:No 2927:No 2921:No 2918:No 2915:No 2912:No 2906:No 2903:No 2897:No 2869:No 2863:No 2860:No 2857:No 2854:No 2851:No 2848:No 2845:No 2825:No 2812:Yes 2809:No 2806:No 2803:No 2800:No 2797:No 2794:No 2791:No 2778:No 2775:No 2772:No 2759:No 2725:No 2716:No 2713:No 2710:No 2707:No 2704:No 2701:No 2695:No 2692:No 2673:No 2670:No 2667:No 2599:No 2596:No 2593:No 2590:No 2587:No 2584:No 2581:No 2567:No 2552:No 2549:No 2546:No 2543:No 2540:No 2537:No 2534:No 2531:No 2515:No 2512:No 2509:No 2506:No 2503:No 2500:No 2497:No 2494:No 2463:No 2460:No 2453:No 2447:No 2444:No 2441:No 2438:No 2435:No 2431:Yes 2428:No 2425:No 2409:No 2406:No 2403:No 2400:No 2394:No 2357:No 2348:No 2345:No 2339:No 2336:No 2333:No 2327:No 2299:No 2285:Yes 2282:No 2279:No 2276:No 2273:No 2265:Yes 2249:No 2246:No 2243:No 2240:No 2237:No 2234:No 2231:No 2228:No 2225:No 2222:No 2216:No 2213:No 2197:No 2194:No 2191:No 2188:No 2182:No 2179:No 2142:No 2139:No 2136:No 2133:No 2130:No 2127:No 2124:No 2121:No 2115:No 2093:No 2087:No 2084:No 2078:No 2075:No 2072:No 2069:No 2066:No 2063:No 2041:No 2035:No 2026:No 2023:No 2020:No 2017:No 2011:No 2008:No 2002:No 1989:No 1986:No 1983:No 1980:No 1974:No 1971:No 1968:No 1965:No 1956:No 1937:No 1934:No 1931:No 1928:No 1925:No 1922:No 1919:No 1916:No 1879:No 1866:Yes 1863:No 1860:No 1857:No 1854:No 1851:No 1848:No 1829:No 1826:No 1817:No 1814:No 1811:No 1808:No 1805:No 1802:No 1799:No 1793:No 1739:IIA 267:el. 252:el. 241:IRV 237:el. 3951:: 3932:— 3267:34 3265:. 3259:. 3231:17 3229:. 3225:. 3202:. 3194:. 3182:. 3178:. 3099:^ 3084:^ 3048:^ 3035:, 3031:, 3027:, 3003:^ 2768:No 2663:No 2456:No 2295:No 2269:No 1580:. 970:RP 603:NZ 592:UK 168:US 157:UK 140:) 133:US 3346:e 3339:t 3332:v 3279:. 3273:: 3244:. 3210:. 3190:: 3184:4 1741:/ 1253:B 1250:A 1072:e 1065:t 1058:v 968:( 954:e 947:t 940:v 605:: 594:: 273:) 264:( 258:) 249:( 243:) 234:( 170:: 159:: 135:: 130:( 98:) 94:( 20:)

Index

Maximize Affirmed Majorities
Politics
Economics
Social choice
electoral systems

Social choice
Mechanism design
Comparative politics
Comparison
List
By country
Single-winner methods
plurality
First preference plurality (FPP)
Two-round
US
Jungle primary
Partisan primary
Instant-runoff
UK
Alternative vote
US
Ranked-choice (RCV)
Condorcet methods
Condorcet-IRV
Round-robin voting
Minimax
Schulze
Ranked pairs

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