Current replication
Spearman rank correlation
Not measuredNo current measurement is available in this registry.
Consumer Choice · 2011
Consumer willingness to pay for food safety in Tanzania: an incentive-aligned conjoint analysis
Tanzanian shoppers paid most for inspected tomatoes and least for South African.
Read the paper ↗01 / Human finding
What the study found
Tanzanian shoppers paid most for inspected tomatoes and least for South African.
Answer-key review: AI-reviewed
02 / Experiment design
Who chose, and what varied
- Country
- Tanzania
- Human respondents
- Not recorded
- Attributes
- 5
- Task
- discrete choice
03 / Synthetic replication
Registry replication results
Paper-era reference
2023 CLM mean Spearman ρ
0.44Historical results use their original estimator and reference. They are not a matched comparison with the current run.
Detailed replication evidence · 2026-11-02
Wrong direction on 5 of 7 significant effects, weak ranking (ρ = -0.22); sizes not comparable (the paper uses other units).
Use it to generate hypotheses to test with people; sizes need the paper's respondent data, and confirm the 5 reversed effects with people.
- direction
- fails
- rank
- fails
- size
- not comparable
Supported uses
- Nothing yet without human confirmation.
Limits to keep in view
- Ranking close levels against each other; the order diverges from humans.
- Decisions that hinge on the attributes whose direction flipped (listed below).
- Effect sizes in the paper's units; only direction, rank and shape are compared.
Effects on a common scale
Human effects: other. Synthetic effects are multiplied by the record’s calibration factor, k = 879.4610. Calibration aligns magnitude; it does not establish agreement in unadjusted effect sizes.
| Attribute / level | Human | Human 95% half-width | Calibrated synthetic |
|---|---|---|---|
| Inspection: The tomatoes are not inspected by health officials (reference) | 0.000 | Not measured | 0.000 |
| Inspection: The tomatoes are inspected by health officials | 215.580 | 52.311 | 539.182 |
| Organic tomatoes: The type of this tomato is not organic (reference) | 0.000 | Not measured | 0.000 |
| Organic tomatoes: The type of this tomato is organic | 113.300 | 51.547 | -81.818 |
| Origin: The origin of this tomato is the region of Tanzania (reference) | 0.000 | Not measured | 0.000 |
| Origin: The origin of this tomato is the region of Uluguru Mountain | -89.670 | 77.419 | 23.052 |
| Origin: The origin of this tomato is the region of Kihonda | -27.170 | 64.992 | 25.075 |
| Origin: The origin of this tomato is the region of South Africa | -197.180 | 68.697 | -115.262 |
| Size: The size of this tomato is small (reference) | 0.000 | Not measured | 0.000 |
| Size: The size of this tomato is big | 110.640 | 49.156 | -56.891 |
| Weight: The weight of this tomato bag is 100 to 200g (reference) | 0.000 | Not measured | 0.000 |
| Weight: The weight of this tomato bag is 500g | -140.950 | 58.662 | 89.644 |
| Weight: The weight of this tomato bag is 1000g | -221.140 | 66.992 | 184.705 |
Subgroups · screen, not a result
Split by gender: no significant difference between the groups, so there is nothing to compare
screen, not a result. Each row is the female group’s effect minus the male group’s, human in WTP TZS/kg (panel Tobit on BDM bids), simulated on the simulation’s own scale, so compare direction, not size. A Jev fast-small screen makes no comparison claim.
- Sign agreement
- –
- 95% interval
- no interval
- Shuffle null
- –
- Shape ρ
- -0.17, null p 0.27
- Scale ratio
- 1.03×
| Group | Simulated n | People n | ρ vs paper |
|---|---|---|---|
| female | 149 | not given | 0.07 |
| male | 131 | not given | 0.14 |
| Attribute / level | People Δ (95%) | Significant | Simulated Δ (own scale) | Direction |
|---|---|---|---|---|
| Inspection: The tomatoes are inspected by health officials | +38.18 ±110.26 | no | +0.03 ±0.07 | not compared |
| Organic tomatoes: The type of this tomato is organic | +4.29 ±110.85 | no | +0.04 ±0.05 | not compared |
| Origin: The origin of this tomato is the region of Uluguru Mountain | +103.89 ±165.39 | no | +0.02 ±0.07 | not compared |
| Origin: The origin of this tomato is the region of Kihonda | +101.85 ±138.31 | no | +0.02 ±0.07 | not compared |
| Origin: The origin of this tomato is the region of South Africa | -19.03 ±146.11 | no | +0.05 ±0.07 | not compared |
| Size: The size of this tomato is big | -23.33 ±104.39 | no | -0.09 ±0.08 | not compared |
| Weight: The weight of this tomato bag is 500g | -98.19 ±124.76 | no | +0.03 ±0.07 | not compared |
| Weight: The weight of this tomato bag is 1000g | +2.22 ±146.15 | no | -0.00 ±0.09 | not compared |
04 / Evidence and limitations
Follow the evidence
Missing results mean unmeasured, not zero agreement.