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From |
Nick Cox <n.j.cox@stata.com> |

To |
statalist@hsphsun2.harvard.edu |

Subject |
Re: st: AW: xttab for 2-way tables |

Date |
Tue, 04 Aug 2009 09:13:30 -0500 |

Nick . webuse nlswork (National Longitudinal Survey. Young Women 14-26 years of age in 1968) . xtset id year panel variable: idcode (unbalanced) time variable: year, 68 to 88, but with gaps delta: 1 unit . xttab msp Overall Between Within msp | Freq. Percent Freq. Percent Percent ----------+----------------------------------------------------- 0 | 11324 39.71 3113 66.08 62.69 1 | 17194 60.29 3643 77.33 75.75 ----------+----------------------------------------------------- Total | 28518 100.00 6756 143.41 69.73 (n = 4711) . xttab race Overall Between Within race | Freq. Percent Freq. Percent Percent ----------+----------------------------------------------------- 1 | 20180 70.72 3329 70.66 100.00 2 | 8051 28.22 1325 28.13 100.00 3 | 303 1.06 57 1.21 100.00 ----------+----------------------------------------------------- Total | 28534 100.00 4711 100.00 100.00 (n = 4711) . egen both = group(msp race), label (16 missing values generated) . xttab both Overall Between Within both | Freq. Percent Freq. Percent Percent ----------+----------------------------------------------------- 0 1 | 6853 24.03 2046 43.43 57.56 0 2 | 4359 15.29 1036 21.99 72.65 0 3 | 112 0.39 31 0.66 68.24 1 1 | 13321 46.71 2747 58.31 78.32 1 2 | 3682 12.91 853 18.11 67.09 1 3 | 191 0.67 43 0.91 83.36 ----------+----------------------------------------------------- Total | 28518 100.00 6756 143.41 69.73 (n = 4711) Thomas Klausch wrote:

Thanks Martin, this kinda works. However it is still a bit of a nuissance. I take that there is no direct command such as xttab, but just made for 2-way tables? 2009/8/3 Martin Weiss <martin.weiss1@gmx.de>:

Why not -collapse- the thing beforehand? If the characteristics are time-invariant, nothing gets lost this way. Then use -tab- as in ************* help tabulate twoway ************* with all the tests available...

Thomas Klausch

I am trying to produce a 2 way table for time invariant characteristics in panel data. For a one way table this can be done using xttab as I understand. However is there a command for producing a 2 way contingency table alongside suitable tests? Or do I need to agregate data to the macro level before I can do this (which would be inconvenient I suppose)?

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**References**:**st: xttab for 2-way tables***From:*Thomas Klausch <thomas.klausch@gmail.com>

**Re: st: AW: xttab for 2-way tables***From:*Thomas Klausch <thomas.klausch@gmail.com>

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