Through its roles in increasing production and promoting health status, education is considered to be of primary importance to sustained income growth (Schultz 1988; Barro 1991). People who are more educated are not only more efficient producers, they are also better able to communicate effectively and to make more informed choices (Sen 1999). In developing countries, access to education helps the rural poor build their human capital, increasing the value of the most abundant asset of most households, labor.