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From |
David Ashcraft <ashcraftd@rocketmail.com> |

To |
"statalist@hsphsun2.harvard.edu" <statalist@hsphsun2.harvard.edu> |

Subject |
Re: st: generate Spell Counter or Duration Variable |

Date |
Fri, 7 Dec 2012 11:30:56 -0800 (PST) |

I am sorry for the confusion: -d- is the dummy variable reflecting change of state from negative to positive (0,1). The final data set would be similar to one appended below. David ----- Original Message ----- From: Nick Cox <njcoxstata@gmail.com> To: statalist@hsphsun2.harvard.edu Cc: Sent: Friday, December 7, 2012 8:18:22 PM Subject: Re: st: generate Spell Counter or Duration Variable Somebody else may understand this, but I don't think this is complete. What's -d-, for example? Nick On Fri, Dec 7, 2012 at 4:52 PM, David Ashcraft <ashcraftd@rocketmail.com> wrote: > Hi Statalist, > > I wanted to generate a duration variable to determine, how long a firm remained in a specific state. the dataset is panel where T>N. The change in state of the firm is explained by a dummy variable. The duration variable as shown below capture duration of each spell. I thought of using -xi i.d- but it generate the same variable as -d-. > > id date2 d Duration > 1 16587 1 1 > 1 16617 1 2 > 1 16646 1 3 > 1 16679 0 0 > 1 16709 1 1 > 1 16740 0 0 > 1 16770 1 1 > 1 16800 0 0 > 1 16832 1 1 > 1 16860 0 0 > 1 16891 1 1 > * * For searches and help try: * http://www.stata.com/help.cgi?search * http://www.stata.com/support/faqs/resources/statalist-faq/ * http://www.ats.ucla.edu/stat/stata/ * * For searches and help try: * http://www.stata.com/help.cgi?search * http://www.stata.com/support/faqs/resources/statalist-faq/ * http://www.ats.ucla.edu/stat/stata/

**References**:**st: generate Spell Counter or Duration Variable***From:*David Ashcraft <ashcraftd@rocketmail.com>

**Re: st: generate Spell Counter or Duration Variable***From:*Nick Cox <njcoxstata@gmail.com>

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