Registro de evidencia del método

Gallagher Disproportionality Index

The Gallagher disproportionality index, also called the least squares index (LSq), is the standard summary measure of how faithfully an electoral system translates votes into seats. Introduced by Michael Gallagher in 1991, it takes the difference between each party's vote share and its seat share, squares those differences, sums and halves them, and takes the square root. Because deviations are squared before aggregation, the index gives disproportionate weight to a few large discrepancies rather than many small ones, capturing the intuition that one badly over- or under-represented party distorts the result more than scattered rounding errors. It has become the most widely reported single-number diagnostic of electoral-system performance in comparative political economy.

Sources recorded, not reviewed

Registro de origen

Citas copiadas textualmente del registro de origen del método. No se infiere ninguna verificación a nivel de afirmación de ellas.

Gallagher Least Squares Index of Electoral Disproportionality

Registro del método taxonómico · process-pipeline / political-economy

Gallagher, M. (1991). Proportionality, Disproportionality and Electoral Systems. Electoral Studies, 10(1), 33-51. · DOI 10.1016/0261-3794(91)90004-C

Abrir método completo

Afirmaciones curadas

Afirmaciones persistidas en el libro mayor de evidencia, cada una con su propia evaluación.

Aún no hay afirmaciones curadas

Esta vista no inventa una evaluación de afirmación si el libro mayor no tiene ninguna.

Métodos relacionados

Generado a partir del grafo de métodos y mostrado como relaciones sugeridas por la máquina; no se infiere ninguna afirmación de evidencia.

Same method familyEffective Number of Partiesmachine-suggested · Relational suggestion, not evidence.Same method familyElectoral System Analysismachine-suggested · Relational suggestion, not evidence.