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.