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Methodology

Data Verification Methodology

How every figure on Mirabello surfaces, the Index, the comparison tools, the open dataset, the AI advisor and our MCP server, is sourced, verified and kept current.

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98Programmes tracked
OfficialSources only
Field-levelProvenance
Twice weeklyIntegrity run

How we verify

Official government sources are the only source of truth

1. Official sources, registered

Each of our 96 tracked programmes is mapped to its official government authority, the citizenship unit, migration ministry, tax administration, or the legal notice itself. Where figures are published only in legislation or gazettes, we read the legal text directly. We never treat marketing sites, agents or aggregators as a source of truth.

2. Value-level verification

A figure is marked verified only after the value itself has been read from the official source, not merely because it carries a recent date. Each verified field stores the source URL and verification date, published openly in the data_freshness block on every record of the dataset.

3. Independent cross-checking

Multiple independent AI models are queried regularly for every programme's headline figures. Where they disagree with our data, the discrepancy is flagged and resolved against the official source, never by majority vote. In practice the models lag reality by one to two years; the official source always adjudicates.

4. Continuous monitoring

  • Twice weekly: an end-to-end integrity run, source liveness, freshness against per-field SLAs, and a check that publicly served figures exactly match the verified knowledge base.
  • Weekly: the full multi-model cross-check across all programmes.
  • Continuous: programme news monitoring; changes are verified against the official source before publication, then dated in the change log.

5. Corrections policy

When we find an error, ours or one circulating in the industry, we correct it publicly in the change log with the official source linked. Accuracy is the brand: a corrected figure builds more trust than a hidden one.

What this means for you

Whether you read our pages, query the open dataset, or let your AI assistant call our tools, you see the same verified figures with their provenance attached. If a number matters to your decision, you can follow it to the government source yourself. The full dataset is available via our MCP server and the open JSON dataset.

How the Index is built

Seven dimensions, transparently weighted

Each programme is scored 0-100 on seven dimensions, combined into a weighted composite. Where a dimension has no verified data it is excluded and the remaining weights are re-normalized (see data_completeness).

DimensionWeightWhat it measures
Cost22%Minimum investment converted to USD (indicative FX), log-normalized, lower cost scores higher
Mobility22%CBI: passport visa-free destination count; RBI: residence travel rights (e
Speed16%Lower-bound official/indicative processing time, faster scores higher
Path15%Path to citizenship, immediate (CBI) scores highest; RBI by years to eligibility
Stability13%Programme maturity and status (operational vs emerging; longevity)
Family7%Cost premium to include a family of four, lower premium scores higher
Tax5%Tax-regime favourability (headline indicator)

The full dataset is available via our MCP and /index.json.

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Mirabello Consultancy provides information and advisory services on investment-migration programmes. Figures are indicative, verified against official sources and provenance-tracked, and are information, not advice. Programme terms change, confirm the detail with a specialist before acting.