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Should Meridian City charge cars to enter downtown at peak hours?

chain-eval-congestion-pricing · state: ready · 5 steps

Scoring run · NEG · v3

After comment foM4ag (step 5)

1 run

Team A

5.257

Net score

+0.649

Comment foM4ag · Δ +4.684 · total +0.649

Team B

3.393

Engine cross-check failed — displayed numbers are the browser recompute

  • sc_durable_traffic_reduction: recomputed 5.256663 vs stored 2.219081
  • sc_downtown_retail_sales_loss: recomputed -3.392787 vs stored -1.570237
  • total: recomputed 1.863876 vs stored state.total_points 0.648843
Step 529 LLM calls+1 atoms2 rejected
raw step payloads
{
  "evaluations": [
    {
      "atoms": [
        {
          "text": "Milan's Area C charge cut entries into the charged zone by roughly 30% in its first years, according to the municipality's monitoring reports.",
          "q_truth": 1,
          "source_kind": "cited_source_claim",
          "temp_atom_id": "tmp_s1_a1"
        },
        {
          "text": "Milan's Area C congestion charge reduced vehicle entries into the charged zone by roughly 30% during its first years, according to the municipality's monitoring reports.",
          "q_truth": 1,
          "source_kind": "cited_source_claim",
          "temp_atom_id": "tmp_s2_a1"
        },
        {
          "text": "Milan's Area C charge reduced entries into the charged zone by approximately 30% during its first years, according to the municipality's monitoring reports.",
          "q_truth": 1,
          "source_kind": "cited_source_claim",
          "temp_atom_id": "tmp_s3_a1"
        }
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      "stage": "p1"
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      "stage": "p2",
      "output": {
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            "variable_id": "v_milan_traffic_reduction",
            "temp_or_atom_id": "tmp_s2_a1",
            "why_this_variable": "The atom directly observes the size and persistence of vehicle-entry reduction in Milan's Area C charged zone after a congestion charge.",
            "why_not_direct_axis": "It does not directly observe Meridian's expected durable downtown traffic reduction; it is an analogous-city input used to infer that axis through the traffic-reduction rule."
          }
        ],
        "sc_actions": [],
        "uncertainty": {
          "level": "low",
          "reasons": [
            "The submission supplies a clear new analogous-city traffic-reduction fact that fits the existing durable traffic reduction SC without creating a new evaluative criterion."
          ]
        },
        "atom_updates": [],
        "axis_rule_actions": [
          {
            "action": "edit",
            "rule_type": "weighted_mean",
            "axis_rule_id": "ar_durable_traffic_reduction",
            "input_weights": {
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              "v_stockholm_traffic_reduction": 0.5
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                "moderate_or_partly_sustained_reduction": 0.6667
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              "v_stockholm_traffic_reduction": {
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                "no_reduction_or_increase": 0,
                "small_or_temporary_reduction": 0.3333,
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            "input_variable_ids": [
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        "atom_status_actions": [],
        "atom_canonicalization": [
          {
            "action": "reject",
            "reason": "Redundant near-duplicate extraction of the same Milan Area C roughly 30% entry-reduction fact; tmp_s2_a1 is created as the single canonical atom rather than merging to a not-yet-existing atom.",
            "temp_atom_id": "tmp_s1_a1",
            "canonical_text": null,
            "existing_atom_id": null
          },
          {
            "action": "create",
            "reason": "This is a distinct factual observation about traffic-entry reductions under an analogous congestion-charge scheme and is not the same fact as any existing Stockholm or retail-sales atom.",
            "temp_atom_id": "tmp_s2_a1",
            "canonical_text": "Milan's Area C congestion charge reduced vehicle entries into the charged zone by roughly 30% during its first years, according to Milan municipal monitoring reports.",
            "existing_atom_id": null
          },
          {
            "action": "reject",
            "reason": "Redundant near-duplicate extraction of the same Milan Area C roughly 30% entry-reduction fact; tmp_s2_a1 is created as the canonical atom.",
            "temp_atom_id": "tmp_s3_a1",
            "canonical_text": null,
            "existing_atom_id": null
          }
        ],
        "world_variable_actions": [
          {
            "kind": "evidence",
            "action": "create",
            "levels": [
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              "small_or_temporary_reduction",
              "moderate_or_partly_sustained_reduction",
              "large_sustained_reduction"
            ],
            "var_id": "v_milan_traffic_reduction",
            "definition": "How large and sustained was the measured reduction in vehicle entries into Milan's Area C charged zone after implementation of the Area C congestion charge?",
            "granularity_rationale": "The atom observes a specific analogous-city traffic outcome, narrower than the Meridian durable-traffic-reduction axis and distinct from the existing Stockholm-specific traffic variable. Future Milan measurements could observe the same issue, and once the Milan outcome is known, repeated reports of it add less direct information about the Meridian axis."
          }
        ]
      },
      "warnings": [],
      "uncertainty": {
        "level": "low",
        "reasons": [
          "The submission supplies a clear new analogous-city traffic-reduction fact that fits the existing durable traffic reduction SC without creating a new evaluative criterion."
        ]
      }
    }
  ],
  "merged": {
    "created": {
      "tmp_s2_a1": "a_milan_s_area_c_congestion"
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    "rejected": [
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    ],
    "retired_atoms": [],
    "q_truth_updates": {},
    "merged_same_fact": {}
  },
  "bayes_outputs": {
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            "no_reduction_or_increase": -0.5,
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          },
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            "large_sustained_reduction": 0.75,
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          },
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            "no_reduction_or_increase": -0.5,
            "large_sustained_reduction": 0.25,
            "small_or_temporary_reduction": -0.25,
            "moderate_or_partly_sustained_reduction": 0
          },
          {
            "no_reduction_or_increase": -1.5,
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            "small_or_temporary_reduction": -1,
            "moderate_or_partly_sustained_reduction": 0
          },
          {
            "no_reduction_or_increase": -0.5,
            "large_sustained_reduction": 0,
            "small_or_temporary_reduction": -0.25,
            "moderate_or_partly_sustained_reduction": 0.25
          },
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            "no_reduction_or_increase": -0.75,
            "large_sustained_reduction": 0,
            "small_or_temporary_reduction": -0.25,
            "moderate_or_partly_sustained_reduction": 0.5
          },
          {
            "no_reduction_or_increase": -1.5,
            "large_sustained_reduction": -0.25,
            "small_or_temporary_reduction": -0.75,
            "moderate_or_partly_sustained_reduction": 0.5
          },
          {
            "no_reduction_or_increase": -0.6,
            "large_sustained_reduction": 0,
            "small_or_temporary_reduction": -0.25,
            "moderate_or_partly_sustained_reduction": 0.25
          },
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            "no_reduction_or_increase": -1,
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            "small_or_temporary_reduction": -0.5,
            "moderate_or_partly_sustained_reduction": 0
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            "large_sustained_reduction": 0.25,
            "small_or_temporary_reduction": -0.25,
            "moderate_or_partly_sustained_reduction": 0.5
          },
          {
            "no_reduction_or_increase": -0.5,
            "large_sustained_reduction": 0,
            "small_or_temporary_reduction": -0.2,
            "moderate_or_partly_sustained_reduction": 0.2
          },
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            "large_sustained_reduction": 0.25,
            "small_or_temporary_reduction": -0.5,
            "moderate_or_partly_sustained_reduction": 0
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            "moderate_or_partly_sustained_reduction": 0.5
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            "large_sustained_reduction": 0,
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            "moderate_or_partly_sustained_reduction": 0.25
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            "large_sustained_reduction": -0.25,
            "small_or_temporary_reduction": -0.25,
            "moderate_or_partly_sustained_reduction": 0.75
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            "large_sustained_reduction": 0,
            "small_or_temporary_reduction": -0.5,
            "moderate_or_partly_sustained_reduction": 0.5
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            "moderate_or_partly_sustained_reduction": 0.5
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            "small_or_temporary_reduction": -0.25,
            "moderate_or_partly_sustained_reduction": 0.5
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            "moderate_or_partly_sustained_reduction": 0.5
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          "large_sustained_reduction": 0.10227272727272728,
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          "moderate_or_partly_sustained_reduction": 0.3159090909090909
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        "variable_id": "v_milan_traffic_reduction"
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    ],
    "p4": {
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        {
          "reason": "The single member atom addresses the same site-specific factual question about the magnitude of Milan Area C vehicle-entry reduction over the relevant early-years horizon.",
          "status": "ok",
          "var_id": "v_milan_traffic_reduction",
          "recommended_action": "keep"
        },
        {
          "reason": "The members all bear on the same Stockholm-specific factual question of whether the reported inner-city traffic reduction was large and durable, including reliability challenges to the same measurement record.",
          "status": "ok",
          "var_id": "v_stockholm_traffic_reduction",
          "recommended_action": "keep"
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      "created_var_ids": [],
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    },
    "touched_vars": [
      "v_axis_durable_traffic_reduction",
      "v_milan_traffic_reduction",
      "v_stockholm_traffic_reduction"
    ],
    "sc_points_after": {
      "sc_durable_traffic_reduction": 2.219080572523837,
      "sc_downtown_retail_sales_loss": -1.5702373639684917
    }
  }
}

A sc_durable_traffic_reduction

Increasing the expected durable reduction in downtown car traffic from a peak-hour cordon charge when side A is chosen strengthens Team A's case.

+5.257L 5.0 · q 1.00 · E[d] 1.051 · prior 0.608Δ +4.101
d 5large durable1.0%
d 3moderate durable15.9%
d 1small or temporary52.3%
d 0none30.8%

bars: belief with evidence · tick: prior-only baseline (the score is the E[d] gap between them)

⊕ blendE[u] 0.286stockholm_traffic_reduction w 0.50milan_traffic_reduction w 0.50
v_stockholm_traffic_reductionw 0.50

How large and durable was the measured inner-city traffic reduction associated with Stockholm's 2006 congestion-charge trial and later permanent charge?

no reduction or increase0.0088.8%
small or temporary reduction0.337.5%
moderate or partly sustained reduction0.673.4%
large durable reduction1.000.3%
sidsourceatompushes
mcZGHMcitedAn external audit found that the toll-gantry system used for the 2006 Stockholm congestion-charge evaluation double-counted vehicles that crossed multiple gantries during one trip. no reduction or increase +0.56
T8E5hhcitedretiredStockholm's city transport office's toll-gantry-based evaluation found that inner-city traffic dropped by about 20% almost immediately after the 2006 congestion-charge trial began. large durable reduction +0.78
T8E5hhcitedq 0.40Stockholm's city transport office's toll-gantry-based evaluation found that Stockholm's inner-city traffic reduction persisted after the congestion charge was made permanent. large durable reduction +0.28
mcZGHMassertedStockholm's city transport office formally withdrew its 2006 congestion-charge trial evaluation in the week of the submission. no reduction or increase +0.57
mcZGHMcitedStockholm's city transport office stated that its headline traffic-reduction figure from the 2006 trial evaluation can no longer be relied upon. no reduction or increase +0.55
14qSjccitedAn independent university research group's evaluation of Stockholm's 2006 congestion-pricing trial found roughly a 20% reduction in traffic crossing into Stockholm's inner city during the trial period. moderate or partly sustained reduction +0.85
v_milan_traffic_reductionw 0.50new

How large and sustained was the measured reduction in vehicle entries into Milan's Area C charged zone after implementation of the Area C congestion charge?

no reduction or increase0.0029.6%
small or temporary reduction0.337.9%
moderate or partly sustained reduction0.6738.8%
large sustained reduction1.0023.7%
sidsourceatompushes
foM4agcitednewMilan's Area C congestion charge reduced vehicle entries into the charged zone by roughly 30% during its first years, according to Milan municipal monitoring reports. moderate or partly sustained reduction +0.80

B sc_downtown_retail_sales_loss

Increasing the expected reduction in downtown retail and small-business sales from a peak-hour cordon charge when side A is chosen strengthens Team B's case.

-3.393L 3.0 · q 1.00 · E[d] 1.131 · prior 0.608
d 5strong1.8%
d 3moderate19.3%
d 1mild46.2%
d 0none32.7%

bars: belief with evidence · tick: prior-only baseline (the score is the E[d] gap between them)

⊕ blendE[u] 0.297stockholm_retail_sales_decline w 0.50london_retail_sales_decline w 0.50
v_stockholm_retail_sales_declinew 0.50

How large and durable was any retail sales decline inside Stockholm's congestion-charge zone after implementation?

no decline or increase0.0045.2%
small or temporary decline0.3342.3%
moderate or persistent decline0.679.1%
large persistent decline1.003.4%
sidsourceatompushes
1FilU9citedStockholm's downtown retail association reported a mid-single-digit sales dip in the congestion-charge zone during the first year of implementation. small or temporary decline +0.63
v_london_retail_sales_declinew 0.50

How large and durable was any retail sales decline inside London's congestion-charge zone after implementation?

no decline or increase0.0046.0%
small or temporary decline0.3310.5%
moderate or persistent decline0.6733.9%
large persistent decline1.009.6%
sidsourceatompushes
1FilU9citedLondon shopkeepers' groups have reported for years that retail sales declined in the congestion-charge zone. moderate or persistent decline +0.49

Highlights show what comment foM4ag changed relative to step 4 (comment mcZGHM).

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