Vega, J.

health inequality malnutrition child concentration index status stunting index infant children concentration country infant mortality world ghana mortality determinant growth population birth result mother household study reference policy world health organization analysis group contribution variable region development child growth standards standard effect level model organization education wealth table childhood malnutrition child malnutrition decomposition concentration indices association death quintile number van doorslaer e equity paper childhood reference population wagstaff -0.01 coefficient page number service citation purposes birth interval journal indicator stunting rates islamic republic evidence toilet infant mortality risk tehran interval -0.04 distribution health care infant death poverty research z-score health care use information