2.118 . The classification of homogeneous branches used in the input-output tables is
based on the Classification of Products by Activity (CPA) . The CPA is a product classification whose elements are structured according
to the industrial origin criterion, industrial origin being defined by NACE
rev. 1.
. The CPA is a product classification whose elements are structured according
to the industrial origin criterion, industrial origin being defined by NACE
rev. 1.