This paper aims to shed light on a range of issues related to wage inequalities in the developing world. While much of the focus is on the gender dimensions of wage differentials, other aspects will also be discussed. In particular, the research revolves around three main areas of investigation: (a) the extent to which wage differentials change as development progresses; (b) the characteristics and driving forces of the gap between urban and rural (and agricultural and non-agricultural) wage earnings; and (c) the complex relationships between the different dimensions of the observed wage gaps.