Fundamentalist scholars justify the different religious laws for men and women by referring to the biological and sociological differences between men and women. For example, regarding the inheritance law which states that women's share of inheritance is half that of men, Ayatollah Makarim Shirazi quotes the Imam Ali ibn Musa Al-reza who reasons that at the time of marriage man has to pay something to woman and woman receives something, and that men are responsible for both their wives' and their own expenses but women have no responsibility thereof.[111] Women, however, make up 27% of the Iranian labor force, and the percentage of all Iranian women who are economically active has more than doubled from 6.1% in 1986 to 13.7% in 2000.[112]