Gerber, Alan S. Green, Donald P. <br/><br/>
Field experiments  Design, analysis and interpretation 

 - New York  Norton and Company  2012 
 - xvii, 492 
<br/><br/><label>ISBN: </label>9780393979954 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Political science-Research<br/>Research methodology<br/>Social science-Research