Hofstede's masculinity versus femininity dimension examined the cultural changes resulting from women's liberation movements. the impact of education on the gender roles attributed to men and women. the relationship between gender and work roles. the extent to which different cultures socialized women into tolerating uncertainty.

I believe the answer is:  The relationship between gender and work roles.
Hofstede believes that current society have a more positive outlook on the masculine characteristic such as heroism and assertiveness and pegged them as a suitable character for leadership positions. 
Meanwhile, feminine characteristics is viewed as something fragile that needed to be protected. This view affect the distribution of gender in a leadership position as we see today.

White dwarf is very hot, but also very small and that is why it may appear dim.