Power-resource distribution varies over time and across countries, unlike rival theories.

Evidence

These various strands of thought all assume that the distribution of power in Western societies has been relatively stable, although they sometimes disagree on whether this distribution is relatively equal or grossly unequal. The power resources approach, in contrast, advances the hypothesis that the distribution of power resources varies, shifting over time and between countries. — Walter Korpi, The Iceberg of Power below the Surface, 3

Categorization

• XREF: This variance-across-time-and-countries premise is exactly what makes Korpi’s measures testable against Gilens & Page’s cross-sectional influence findings.
• SEED: Angle: ‘the power distribution is not stable’ as the underrated premise that made measurable structural power possible.