11 KiB
Causal Timing: Centrist Support Shift for Right-Wing Motions
Goal: Identify the exact timing of the centrist support shift and correlate it with political events to distinguish between competing causal explanations.
Analysis period: 2016-Q2 through 2026-Q1 (all quarters with data) Total right-wing motions analyzed: 2986 Right-wing parties: PVV, FVD, JA21, SGP Centrist parties: VVD, D66, CDA, NSC, BBB, CU
1. Key Findings
Raw inflection point: 2024-Q1 (first quarter with centrist_support > 0.4 and n >= 20) Rolling inflection point: 2024-Q2 (3-Q rolling average crosses 0.4) Pre-inflection mean (CS): 0.329 (n=24 quarters) Post-inflection mean (CS): 0.514 (n=9 quarters) Shift velocity (4Q pre vs 4Q post): 0.338 Shift onset relative to Schoof cabinet: BEFORE cabinet formation
Shift shape test: IMMEDIATE — the structural break jump (2023-Q4 -> 2024-Q1) was +0.180, exceeding the 0.1 threshold.
- Max single-quarter jump: 0.2289 at 2020-Q4
- Average absolute quarterly change: 0.0965
- Jump ratio (max / avg): 2.37x
- Pre-inflection average QoQ delta: +0.0112
- Post-inflection average QoQ delta: -0.0209
The largest single-quarter jump was +0.229 (2020-Q3 -> 2020-Q4). However, the structural break occurs at the shift onset: +0.180 (2023-Q4 -> 2024-Q1), which is 1.9x the average quarterly change (0.097). Pre-inflection spikes (e.g. 2020-Q4: +0.229) reverted within one quarter, while the 2024-Q1 structural break was sustained — centrist support stayed above 0.4 for 8 consecutive quarters afterward.
Key insight: The centrist support shift began ** BEFORE the Schoof cabinet formation** (July 2024) and AFTER the PVV's November 2023 election victory. This timing pattern suggests the shift is electorally driven — centrist parties adjusted voting behavior in response to the electoral shock, not as a response to coalition dynamics.
2. Political Event Correlation Timeline
| Quarter | Date | Event | Category | CS at event | Shift Timing |
|---|---|---|---|---|---|
| 2021-Q1 | Mar 2021 | Rutte IV election | dutch | 0.150 | 12 quarters before shift |
| 2022-Q3 | Sep 2022 | Sweden rightward shift | european | 0.133 | 6 quarters before shift |
| 2022-Q4 | Oct 2022 | Meloni (Italy) | european | 0.227 | 5 quarters before shift |
| 2023-Q2 | Apr 2023 | Finland rightward shift | european | 0.306 | 3 quarters before shift |
| 2023-Q4 | Nov 2023 | PVV victory (Schoof election) | dutch | 0.321 | 1 quarters before shift |
| 2024-Q3 | Jul 2024 | Schoof cabinet formation | dutch | 0.588 | 3 quarters after shift |
European rightward shift context:
- Pre-European shift mean CS (before 2022-Q3): 0.365
- During European shift period (2022-Q3 to 2023-Q2), mean CS: 0.222
- No evidence of anticipatory Dutch centrist response to European rightward trends.
- Dutch centrist support for RW motions remained low (0.365) throughout the European rightward shift period.
3. Shift Velocity Analysis
| Metric | Value |
|---|---|
| Inflection quarter (raw) | 2024-Q1 |
| Pre-4Q average | 0.24 |
| Post-4Q average | 0.577 |
| Delta (post - pre) | 0.338 |
| Pre window | 2023-Q1 to 2023-Q4 |
| Post window | 2024-Q1 to 2024-Q4 |
The shift velocity (delta = 0.338) represents the difference between the average centrist support in the 4 quarters before vs after the inflection point. This confirms a rapid, discrete structural break rather than a gradual trend.
4. Enriched Event Proximity Analysis
| Quarter | Event | CS | Proximity to shift |
|---|---|---|---|
| 2021-Q1 | Mar 2021 - Rutte IV election | 0.150 | 12 quarters before inflection (2024-Q1) |
| 2022-Q3 | Sep 2022 - Sweden rightward shift | 0.133 | 6 quarters before inflection (2024-Q1) |
| 2022-Q4 | Oct 2022 - Meloni (Italy) | 0.227 | 5 quarters before inflection (2024-Q1) |
| 2023-Q2 | Apr 2023 - Finland rightward shift | 0.306 | 3 quarters before inflection (2024-Q1) |
| 2023-Q4 | Nov 2023 - PVV victory (Schoof election) | 0.321 | 1 quarters before inflection (2024-Q1) |
| 2024-Q3 | Jul 2024 - Schoof cabinet formation | 0.588 | 3 quarters after inflection (2024-Q1) |
Interpretation:
- The PVV election (2023-Q4) immediately precedes the inflection point (2024-Q1).
- The Schoof cabinet formation (2024-Q3) occurs AFTER centrist support had already crossed 0.4.
- European rightward trends (2022-Q3 to 2023-Q2) had no visible effect on Dutch centrist voting.
Causal conclusion: The Overton window shift is electorally (not coalition) driven. Centrist parties did not wait for the cabinet to form before adapting their voting. The adjustment was immediate upon the electoral signal (PVV victory, Nov 2023).
5. Quarter-over-Quarter Delta Analysis (most recent)
| Transition | Delta | From CS | To CS | From N | To N | Flag |
|---|---|---|---|---|---|---|
| 2021-Q1 -> 2021-Q2 | -0.0106 | 0.1500 | 0.1394 | 90 | 104 | |
| 2021-Q2 -> 2021-Q3 | +0.0279 | 0.1394 | 0.1673 | 104 | 68 | |
| 2021-Q3 -> 2021-Q4 | +0.0474 | 0.1673 | 0.2147 | 68 | 163 | |
| 2021-Q4 -> 2022-Q1 | -0.1481 | 0.2147 | 0.0667 | 163 | 15 | |
| 2022-Q1 -> 2022-Q2 | +0.1476 | 0.0667 | 0.2143 | 15 | 119 | (spike) |
| 2022-Q2 -> 2022-Q3 | -0.0818 | 0.2143 | 0.1325 | 119 | 83 | |
| 2022-Q3 -> 2022-Q4 | +0.0945 | 0.1325 | 0.2271 | 83 | 229 | |
| 2022-Q4 -> 2023-Q1 | -0.0789 | 0.2271 | 0.1482 | 229 | 77 | |
| 2023-Q1 -> 2023-Q2 | +0.1574 | 0.1482 | 0.3056 | 77 | 90 | (spike) |
| 2023-Q2 -> 2023-Q3 | -0.1217 | 0.3056 | 0.1838 | 90 | 68 | |
| 2023-Q3 -> 2023-Q4 | +0.1367 | 0.1838 | 0.3205 | 68 | 130 | (spike) |
| 2023-Q4 -> 2024-Q1 | +0.1804 | 0.3205 | 0.5009 | 130 | 98 | STRUCTURAL BREAK |
| 2024-Q1 -> 2024-Q2 | +0.0717 | 0.5009 | 0.5726 | 98 | 124 | |
| 2024-Q2 -> 2024-Q3 | +0.0157 | 0.5726 | 0.5882 | 124 | 17 | |
| 2024-Q3 -> 2024-Q4 | +0.0593 | 0.5882 | 0.6476 | 17 | 230 | |
| 2024-Q4 -> 2025-Q1 | -0.0499 | 0.6476 | 0.5977 | 230 | 29 | |
| 2025-Q1 -> 2025-Q2 | -0.0947 | 0.5977 | 0.5030 | 29 | 165 | |
| 2025-Q2 -> 2025-Q3 | -0.0665 | 0.5030 | 0.4366 | 165 | 155 | |
| 2025-Q3 -> 2025-Q4 | +0.0129 | 0.4366 | 0.4495 | 155 | 106 | |
| 2025-Q4 -> 2026-Q1 | -0.1157 | 0.4495 | 0.3338 | 106 | 151 |
Quarters with delta > 0.1 are flagged as JUMP — indicating discrete structural breaks.
6. Full Quarterly Summary
| Quarter | N | Mean CS | Std |
|---|---|---|---|
| 2016-Q2 | 3 | 0.5000 | 0.0000 |
| 2016-Q4 | 3 | 0.8333 | 0.2887 |
| 2018-Q3 | 1 | 1.0000 | 0.0000 |
| 2018-Q4 | 4 | 1.0000 | 0.0000 |
| 2019-Q1 | 1 | 0.0000 | 0.0000 |
| 2019-Q2 | 4 | 0.5000 | 0.5774 |
| 2019-Q3 | 25 | 0.3000 | 0.3819 |
| 2019-Q4 | 165 | 0.3912 | 0.4172 |
| 2020-Q1 | 79 | 0.2785 | 0.4063 |
| 2020-Q2 | 130 | 0.2577 | 0.3998 |
| 2020-Q3 | 78 | 0.1667 | 0.3290 |
| 2020-Q4 | 182 | 0.3956 | 0.4271 |
| 2021-Q1 | 90 | 0.1500 | 0.3219 |
| 2021-Q2 | 104 | 0.1394 | 0.2911 |
| 2021-Q3 | 68 | 0.1673 | 0.2659 |
| 2021-Q4 | 163 | 0.2147 | 0.3726 |
| 2022-Q1 | 15 | 0.0667 | 0.1759 |
| 2022-Q2 | 119 | 0.2143 | 0.3658 |
| 2022-Q3 | 83 | 0.1325 | 0.2931 |
| 2022-Q4 | 229 | 0.2271 | 0.3609 |
| 2023-Q1 | 77 | 0.1482 | 0.2805 |
| 2023-Q2 | 90 | 0.3056 | 0.3873 |
| 2023-Q3 | 68 | 0.1838 | 0.3221 |
| 2023-Q4 | 130 | 0.3205 | 0.3634 |
| 2024-Q1 | 98 | 0.5009 | 0.3812 |
| 2024-Q2 | 124 | 0.5726 | 0.3767 |
| 2024-Q3 | 17 | 0.5882 | 0.3638 |
| 2024-Q4 | 230 | 0.6476 | 0.3540 |
| 2025-Q1 | 29 | 0.5977 | 0.4308 |
| 2025-Q2 | 165 | 0.5030 | 0.3872 |
| 2025-Q3 | 155 | 0.4366 | 0.4257 |
| 2025-Q4 | 106 | 0.4495 | 0.4309 |
| 2026-Q1 | 151 | 0.3338 | 0.4347 |
7. Figure
Figure elements:
- Top panel: Centrist support trajectory with inflection point, political event annotations, and 3-Q rolling average. Dutch events in black, European events in purple.
- Bottom panel: Quarter-over-quarter deltas (bar chart). Red bars exceed the 0.1 jump threshold.
- Green dashed line: Quarter with the maximum single-quarter jump.
- Red dashed horizontal (bottom): Jump detection threshold (0.1).
8. Causal Interpretation
Competing Explanations Evaluated
| Hypothesis | Evidence | Verdict |
|---|---|---|
| Electoral shock: Centrist parties adapted voting after PVV victory (Nov 2023) | CS jumped from 0.321 (2023-Q4) to 0.501 (2024-Q1) — immediate post-election surge | SUPPORTED |
| Coalition dynamics: Centrist parties softened after Schoof cabinet formed (Jul 2024) | Shift began in 2024-Q1, before cabinet formation in 2024-Q3 | REFUTED |
| Gradual learning curve: Centrists warmed to RW proposals over time | Max QoQ jump (0.229) is 2.4x the average change (0.097) — discrete breakpoint, not gradual ramp | REFUTED |
| European contagion: Dutch shift mirrors European rightward trends (Meloni 2022, Sweden 2022, Finland 2023) | No change in Dutch CS during the European shift period (2022-2023); Dutch shift occurred 1+ year later | REFUTED |
| Strategic moderation: RW parties moderated proposals, making them acceptable | Temporal alignment: CS jumped immediately after election, before any evidence of systematic moderation | PARTIALLY SUPPORTED (moderation may reinforce, but electoral shock triggered the shift) |
Verdict
The centrist support surge for right-wing motions is primarily an electoral shock phenomenon. The inflection point (2024-Q1) occurs in the quarter immediately following the PVV's November 2023 election victory. Centrist support jumped by +0.18 (2023-Q4 -> 2024-Q1) — 2x the typical quarterly variation (0.097).
This rules out prominent alternative explanations:
- Coalition dynamics cannot explain it — the shift preceded cabinet formation.
- Gradual learning cannot explain it — the jump is discontinuous, not incremental.
- European contagion cannot explain it — no Dutch response during the European shift window.
The most parsimonious explanation is that centrist parties (VVD, D66, CDA, NSC, BBB, CU) perceived the PVV's electoral success as a mandate for right-wing policy and adjusted their voting behavior accordingly, even before the new cabinet was formed. This suggests the Overton window shift reflects genuine changes in centrist elite behavior, not merely coalition discipline or administrative spillover.
9. Limitations
- Quarterly resolution: Quarterly aggregation may obscure within-quarter dynamics. Monthly data would be too noisy; annual data would miss the breakpoint.
- Causal inference: This analysis identifies temporal correlations, not causal mechanisms. A proper causal design (diff-in-diff, synthetic control) would require comparison groups.
- European comparison: European events are correlated at the quarter level, but the analysis does not control for domestic factors that may have mediated any European effect.
- Coalition coding: 2024 coalition is coded as Schoof for the full year, but the cabinet only formed in July 2024. Early 2024 coalition-submitted motions are identified using the Schoof coalition, which may misclassify some motions.