<h1>GDP estimation: paid up capital blow up adjusts private corporate GVA, affecting levels more than annual growth.</h1> Misinterpretation that out of survey units in the MCA database materially overstate GDP is misplaced: 21.4% are out of coverage enterprises engaged in other sectors and thus part of GDP, 0.9% are excluded establishments and 16.4% are closed or non traceable. GDP estimation applies a paid up capital based blow up factor because non reporting firms represent only 12-15% of paid up capital, yielding a modest multiplier of about 1.13-1.17; this adjustment affects GVA levels more than year to year growth rates, and the MCA private corporate database improves overall economic measurement.