many parts of the world, women with dependent children are expected to stay at home and dedicate all their energy to child raising, while in other places mothers most often return to paid work (see working mother and stay-at-home mother). Religion Particular religious doctrines have specific stipulations relating to gender roles, social and private interaction between the sexes, appropriate dressing attire for women, and various other issues affecting women and their position in society. In many countries, these religious teachings influence the criminal law, or the family law of those jurisdictions (see Sharia law, for example). The relation between religion, law and gender equality has been discussed by international organizations. Education Single-sex education has traditionally been dominant and is still highly relevant. Universal education, meaning state-provided primary and secondary education independent of gender, is not yet a global norm, even if it is assumed in most developed countries. In some Western countries, women have surpassed men at many levels of education. For example, in the United States in 2005/2006, women earned 62% of associate degrees, 58% of bachelor's degrees, 60% of master's degrees, and 50% of doctorates. The educational gender gap in Organisation for Economic Co-operation and Development (OECD) countries has been reduced over the last 30 years. Younger women today are far more likely to have completed a tertiary qualification: in 19 of the 30 OECD countries, more than twice as many women aged 25 to 34 have completed tertiary education than have women aged 55 to 64. In 21 of 27 OECD countries with comparable data, the number of women graduating from university-level programmes is equal to or exceeds that of men. 15-year-old girls tend to show much higher expectations for their careers than boys of the same age. While women account for more than half of university graduates in several OECD countries, they receive only 30% of tertiary degrees granted in science and engineering fields, and women account for only 25% to 35% of researchers in most OECD countries. Research shows that while women are studying at prestigious universities at the same rate as men they are not being given the same chance to join the faculty. Sociologist Harriet Zuckerman has observed that the more prestigious an institute is, the more difficult and time-consuming it will be for women to obtain a faculty position there. In 1989, Harvard University tenured its first woman in chemistry, Cynthia Friend,