Value judgements.  [electronic resource] 

 -  Nature  May 2011 
 - 123-4 p.  digital 
<br/><br/> Publication Type: Editorial 
<br/><br/><label>ISSN: </label>1476-4687 
<br/><br/><label>Standard No.: </label>10.1038/473123b  doi 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Policy Making<br/>Research--economics