Calibration starts from real data.
From that data, we build a population.
The data turn into targets.Age, region, occupation…
Each market has its own reference.
European Social Survey, round 11, for five European countries.
Public sources stay open.A named reference anyone can verify.
We compare the generated population with the reference.
We measure the gap that remains.Measured and documented, market by market.
A model fitted on US data does not describe France.
Calibration comes before fieldwork and does not replace it.
Start with reality, measure the gap.Fieldwork still has the final word.
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