SOURCES TRACKED52,000+ TIME SERIES1.8M DATA POINTS100M+ AS OFOCTOBER 2026
OPEN APERTURE →
§ 03 · Methodology
StandardTier-1 official first
ChecksAutomated, every source
ProvenanceSource, date, licence

Collection. Checks.
Production. Delivery.

Every figure EDS publishes traces to its source, retrieval date and licence. Where official data is missing or late, the portal labels the series with a caveat. We publish what we know and how we know it.

§ 01 · The four-stage pipeline

From source to cited figure.

Data flows through four stages, and every archived artifact carries a provenance record. No black-box magic.

01

Collection

Tier-1 official sources first — statistics offices, regulators, central banks. News and secondary sources are tagged as such.

52,000+ sources tracked
02

Checks

Automated schema, completeness, duplicate and freshness checks on every source. Current source health is public.

Source health published
03

Production

Series become scores, rankings and country profiles. Written briefings are AI-drafted from cited sources and labelled as such.

MERI v1.0.0
04

Delivery

Delivered through Aperture: rankings, country profiles, comparisons and CSV/PDF export, each with source attribution.

API in development
§ 02 · Sources

What counts as a source.

Tier-1 official sources first. Sources are checked on a schedule; most publish annually. Current source health is public.

See current source health
Kind Source class What it is Tracked
DataStatistical and official data sourcesStatistics offices, regulators, central banks and other publishers in the public register on Aperture3,200+
NewsNews and publisher feedsRSS feeds registered for news collection49,000
AllSources trackedEvery source in the register: 3,232 data sources plus 49,019 news feeds52,000+
As of October 2026.
§ 03 · MERI

One methodology, published in full.

MERI scores 158 countries on readiness for foreign market entry. The full MERI methodology is public at marketaperture.io/methodology, and it is the single methodology behind every score.

→VersionMERI v1.0.0
→Scored year2024
→Countries scored158
→Countries ranked156
→Indicators188
Read the MERI methodology
APERTURE · MERI v1.0.0 WHAT IT IS NOT

MERI is a screening tool. It is not yet validated against outcomes, and it is not investment advice.

From Aperture’s methodology: “MERI has not yet been tested against realised market-entry outcomes such as later foreign direct investment.”

“Aperture scores are screening signals for research and teaching, not investment advice.”

§ 04 · Caveats

What we won't pretend.

Coverage is uneven across the world by design, and we say so plainly where it is thin. We publish what we know and how we know it.

Caveat: late or missing

Official data not there yet

Where official data is missing or late, the portal labels the series with a caveat.

Caveat: estimated

Imputed values

Where a missing component is estimated, the value is flagged as imputed and counted on the country profile.

Caveat: contested

Sources disagree

When official sources disagree, we say so. We do not silently pick a winner.

Documentation

Read the methodology in full.

The full MERI methodology is public at marketaperture.io/methodology. No sign-in and no agreement needed.