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From | Martijn S <martstouthart@gmail.com> |
To | statalist@hsphsun2.harvard.edu |
Subject | st: Creating a time lag dummy |
Date | Tue, 10 May 2011 19:01:13 +0200 |
Hello, I have a problem generating a ‘special’ dummy. This is my problem. I have the following columns fyear and year_ipo. Now I want to create a dummy which gives a 1 when a company has gone public in the prior 5 calendar years and a 0 otherwise. So for example, I have a company which had an IPO in 1999. So this dummy should create a 1 for the fiscal year 2000,2001…,2004 and a zero for 2005,2006…2010. Unfortunately I cannot get the dummy working. I hope that someone can help me solving my problem. Thanks, Martijn * * For searches and help try: * http://www.stata.com/help.cgi?search * http://www.stata.com/support/statalist/faq * http://www.ats.ucla.edu/stat/stata/