The choice how to define an industry and how to aggregate
(or disaggregate) industry data is always subjective
and done on a pragmatic and/or ad hoc basis. For
example, the industry definitions of Statistics Finland
and Eurostat vary from time to time, depending on the
purpose of use and usability. What is relevant is the continuation
of uninterrupted time series if one wants to see
how industries and company clusters are developing over
time. Hence, our decision on aggregation of company
data is purely a pragmatic choice, which may be rightfully
criticised, but which provides uniform time series
and hence best foundation for conclusions and prospective
policy decisions.