Pal Suren, the lead author of the Norwegian study, says that no adjustments for parental age or other factors seemed to make a big difference in the size of the effect.
Hence, he says, his take-it-or-leave-it offer in September to PAL's three unions: a 20% employee stake in the company plus three seats on the 15-member board - in exchange for a commitment not to strike for 10 years and cuts in employee benefits that would add up to half of take-home pay.