DJI – “Brain drain” or “brain gain”? https://www.dji.de/veroeffentlichungen/literatursuche/detailansicht/literatur/25147-brain-drain-or-brain-gain.html?no_cache=1&print=1&cHash=adf7753a2ab107760d07e1e129dfa0ac
Given that each pattern can have a high/low-value (average for observed period),