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From |
"Martin Weiss" <martin.weiss1@gmx.de> |

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

Subject |
AW: st: AW: Logical condition |

Date |
Thu, 15 Oct 2009 16:25:05 +0200 |

<> -xtset- and -tsset- should make no difference whatsoever. Just tried in Stata 10 and 11... HTH Martin -----Ursprüngliche Nachricht----- Von: owner-statalist@hsphsun2.harvard.edu [mailto:owner-statalist@hsphsun2.harvard.edu] Im Auftrag von Dmitriy Krichevskiy Gesendet: Donnerstag, 15. Oktober 2009 16:22 An: statalist@hsphsun2.harvard.edu Betreff: Re: st: AW: Logical condition Thanks for your help Martin. Unfortunately, I get 'time-series operators not allowed' even though the dataset has been declared panel via xtset (I also tried tsset to no avail). Thanks again. 2009/10/14, Martin Weiss <martin.weiss1@gmx.de>: > > <> > > > > ************* > clear* > > input byte( id time b1 i1) > 1 1 1 3 > 1 2 1 4 > 1 3 0 2 > 2 1 0 5 > 2 2 1 6 > 2 3 0 4 > 3 1 0 2 > 3 2 1 3 > 3 3 1 1 > end > > compress > list, noobs sepby(id) // in 1/20 > > bys id (time): /* > */ gen byte select= b1[1]==0 & b1[2]==1 > > list if select, sepby(id) > ************* > > > > HTH > Martin > > -----Ursprüngliche Nachricht----- > Von: owner-statalist@hsphsun2.harvard.edu > [mailto:owner-statalist@hsphsun2.harvard.edu] Im Auftrag von Dmitriy > Krichevskiy > Gesendet: Mittwoch, 14. Oktober 2009 22:10 > An: statalist > Betreff: st: Logical condition > > Dear Listers, > > I have a large panel dataset for which I was hoping to analyze a > particular subset of agents. More specifically: > > id time b1 i1 > 1 1 1 3 > 1 2 1 4 > 1 3 0 2 > 2 1 0 5 > 2 2 1 6 > 2 3 0 4 > 3 1 0 2 > 3 2 1 3 > 3 3 1 1 > I want to select only those agents from above example who have > switched their b1 status from 0 to 1 in the first two periods (agents > 2 and 3 above). I want to see what happened to their b1 status since > then, more specifically I want to see how future change in status of > b1 (back to 0) has reflected on other variables (agent 2 here changes > back to 0, and he now has a value of 4 in i1 variable whereas he > started with i1=5 before his b1 status has changed). Unfortunately > every condition I try to set up drops all observations since b1=0 and > b1=1 are mutually exclusive even though I am looking at different time > periods. > > I hope the above makes sense; and, as always, thanks for your help. > Dmitriy > * > * 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/ > > > * > * 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/ > -- Dmitriy Krichevskiy a. b. c. d. e. f. g. h. i. j. k. l. m. n. o. p. q. r. s. t. u. v. w. x. y. z. * * 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/ * * 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/

**References**:**st: Logical condition***From:*Dmitriy Krichevskiy <krichevskyd@gmail.com>

**Re: st: AW: Logical condition***From:*Dmitriy Krichevskiy <krichevskyd@gmail.com>

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