A maiservant or in current usage maid is a female employed in domestic service. Once part of an elaborate hierarchy in great houses, today the maid may be the only domestic worker that upper and even middle-income households can afford. In the Western world, comparatively few households can afford live-in domestic help, usually compromising on periodic cleaners. In less developed nations, very large differences in the income of urban and rural households and between different socio-economic classes, fewer educated women and limited opportunities for working women ensures a labour source for domestic work.