^Maybe women in lebanon tend to be less career-ambitious than women in Canada, and maybe more marrying up tendency , but that doesn't mean that marrying up doesn't exist elsewhere. Besides I think Canada is an exception too, too liberal...even more than the US and half of Europe. I think we are comparing two extremes here.
Anyways, here a study with the data to check:
http://www.landofangels.de/py1/buss-barnes-1986.pdfquoted:
Sex Differences in Mate Selection Preferences
To examine sex differences, we computed t tests for each of
the 76 items. In relation to men, the women in this sample tended
to prefer the following spouse characteristics: considerate, honest,
dependable, kind, understanding, fond of children, well-liked by
others, good earning capacity, ambitious and career-oriented,
good family background, and tall (all ps < .01, two-tailed). In
contrast, men in this sample tended to prefer more than did
women the following spouse characteristics: physically attractive,
good looking, good cook, and frugal (all ps < .01, two-tailed).
Of course, that study doesn't improve who marry up who, but it may explains why A tend to marry up more than B.
it seems that given the data above, men would also be "marrying-up" but with different criteria - attractiveness.
alternately, it could also make a case for men "marrying-down" in terms of finances, with the addition of frugality and cooking skills as mate selection criteria (women as housewives).
have you seen a more recent study that talks about mate selection processes? the one you linked is an entire generation out of date.