Stephan, Paula <br/><br/>
The Endless frontier :  Reaping what bush sowed? / 
Paula Stephan 
 - Cambridge  NBER  2013 
 - 48p 
 - NBER Working Paper ;  19687 .
<br/><br/><label>Subjects--Topical Terms: </label><br/>NBERWP 19687<br/>E10842.pdf