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From |
Maarten Buis <maartenlbuis@gmail.com> |

To |
statalist@hsphsun2.harvard.edu |

Subject |
Re: st: Shapes of two Inverted U curves (same model on two different samples) |

Date |
Tue, 5 Jul 2011 11:30:33 +0200 |

On Tue, Jul 5, 2011 at 11:16 AM, L.M.A. Mulotte wrote: > Now, are there any means to graph the two Inverted-U curves on the same graph? *------------------------- begin example -------------------------- use http://www.stata-press.com/data/r11/nlswork, clear // estimate the model reg ln_wage i.south i.south#(c.age##c.age c.grade c.birth_yr) // we change the data in ways we will not want to store preserve // fix remaining variables at their mean value sum grade if e(sample), meanonly replace grade = r(mean) sum birth_yr if e(sample), meanonly replace birth_yr = r(mean) // predict log wage predict yhat // sperate curves for south and north separate yhat, by(south) // we only need one observation per age/south combination // this makes the graph smaller and quicker bys age south : gen byte mark = _n == 1 // create the graph twoway line yhat? age if mark // get original data back restore *----------------------------------- end example ---------------------------- (For more on examples I sent to the Statalist see: http://www.maartenbuis.nl/example_faq ) Hope this helps, Maarten -------------------------- Maarten L. Buis Institut fuer Soziologie Universitaet Tuebingen Wilhelmstrasse 36 72074 Tuebingen Germany http://www.maartenbuis.nl -------------------------- * * 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**:**Re: st: Shapes of two Inverted U curves (same model on two different samples)***From:*Maarten Buis <maartenlbuis@gmail.com>

**RE: st: Shapes of two Inverted U curves (same model on two different samples)***From:*"L.M.A. Mulotte" <L.Mulotte@uvt.nl>

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