Sultan grammar—uses the same words for both women and men. However, this styling misconstrues the roles of wives of sultans. In a similar usage, the wife of a German field marshal might be styled "Frau Feldmarschall" (similarly, in French, constructions of the type "madame la maréchale" are quite common). The female leaders in Muslim history are correctly known as "sultanas". However, the wife of the sultan in the Sultanate of Sulu is styled as the "panguian" while the sultan's chief wife in many sultanates of Indonesia and Malaysia are known as "permaisuri", "Tunku Ampuan", "Raja Perempuan", or "Tengku Ampuan". The queen
Female labor force in the Muslim world and economic opportunities are limited. Possible explanations for this phenomenon could the same determinants of high self-employment among females and low rates of female employers: low levels of economic development, gendered employment social norms, or capital-intensive industry. This last explanation may be particularly salient in the oil-rich Muslim nations because petroleum exports are capital-intensive and require very high skilled labor which most Muslim women are incapable of providing given low levels of education. The Great Recession has increased unemployment across the board in many Muslim nations and female workers were not left unaffected. According to the World Bank, in 2009,