Costa, Dora L. <br/><br/>
The Unequal work day: a long-term view 

 - Cambridge, MA  NBER  1998 
 - 12p 
 - NBER Working Paper series .
<br/><br/><label>ISBN: </label>
<br/><br/><label>Dewey Class. No.: </label>WP 6419