De Tray, Dennis N., <br/><br/>
Child quality and the demand for children / 
Dennis N. De Tray 
 - 55 pages ;  28 cm. 
 - The Rand paper series;  P-4838 .
 - The Rand paper series;  P-4838 .
<br/><br/>Includes bibliographical references: pages 38-41 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Family size--Mathematical models<br/>Fertility, Human--Mathematical models.