Helpman,  Elhanan <br/><br/>
Foreign trade and investment :  Firm-level perspectives / 
Elhanan Helpman 
 - Cambridge  NBER  2013 
 - 31p 
 - NBER Working Paper ;  19057 .
<br/><br/><label>Subjects--Topical Terms: </label><br/>NBERWP 19057<br/>E9925.pdf