The income growth is expected to reduce gender inequality by loosening constraints, improving market opportunities, promoting market mechanisms, increasing household available resources and so on (See Dollar and Gatti, 1999, Forsythe et al., Religious affiliation and civil liberties are included following Dollar and Gatti (1999). They show that, to a large extent, gender inequality can be explained by religious preference and underlying characteristics of societies, such as the extent of civil liberties.