> In my informal experience, fathers and sons tend to work together
> full-time only in professions with strict licensing or training
> requirements. Electricians, lawyers, realtors and even CPAs - I've
> found more father/son teams here than in any other type of job. All
> of those jobs have fairly rigid prerequisites (electricians have to
> pass journeyman and master-level tests; lawyers have the bar and law
> school, etc). Why is that?
I'm not sure this is actually true. Eric Crampton mentioned farming
as a non-licensed procession with lots of father-son teams, and I'd
add retailing -- more so in the time before chain stores, but to some
extent even now. Don't you remember all the stores with names like
"George Johnson & Sons"?
> Also - why is it more often "father/son," and not "mother/daughter" or "mother/son"?
> Or "father/daughter"?
You'd have to adjust the frequency of these teams to the percentage
of women in each profession and see if the percentage of such teams
involving women is more or less than what you'd expect based on the
percentage of women in the profession.
As a sidelight, I've noticed several "father/daughter" teams amoung
lawyers, and the hardware retailer "88 Lumber" is run by a
father/daughter team (and it's not because the father doesn't have
sons; he does).