Now available: Smith, Herbert L. 2009. "A Double Sample to Minimize Bias Due to Non-response in a Mail Survey." PSC Working Paper Series, PSC 09-05. [English version of Smith 2008.]
Now available: Smith, Herbert L. 2009. "A Double Sample to Minimize Bias Due to Non-response in a Mail Survey." PSC Working Paper Series, PSC 09-05. [English version of Smith 2008.]