in
linear recruiting a
firm hires a
girl to write their letters. After 60 days they find she doesn't do her
job. So they get rid of her and
hire another. And in 90 days find she can't do her
job. So they
fire her and
hire another. That's 150 days of no-correspondence. It's enough to
ruin any
firm. It's costly. In simultaneous hiring a
firm hires 3 girls feeling they need 1. At the end of 150 days they have 1
girl. But they had 150 days of correspondence. And a
profit.
(HCO PL 29 Aug 70 III)