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  • VAR Model Lag Length

    Code:
    * Example generated by -dataex-. To install: ssc install dataex
    clear
    input float(Dlrgdp Dlop Dlexc Dunp Dinf)
               .            .            .           .           .
      -.04316902 -.0036604404 -.0008628368         -.1    2.503651
     -.028956413   -.08054447  -.020701766          .7   2.0455003
       .08399487    .17828774    .03753448         -.5    .8228207
      -.01137352   -.04705215    .06241119          .2     1.62337
     -.022613525   -.10607576    .06047547          .2   -.7381243
     -.015737534   -.05337715    .06826341          .4   -.4310148
       .05860233    .05288005   -.04127169         -.6  -1.1944033
      -.01995945   -.08884788   .019032836          .2  -.48498535
     -.025244713    .04567003    .02091241          .4   -.8472849
     -.009765625  -.009387732    .08882523          .4  -.19893816
       .06259918   -.00683546   .073213935          .4    .7637694
     -.009399414    -.0800426  -.005073905          .4   -1.834847
      .007008553   .010914087  .0083755255          .1   -.6644893
     -.017912865    .02732563   .032039404          .1  -1.3179516
      .065146446   -.04581285   .013346195        -1.2   -.5009662
       .00942421   .010084867    .02453232          .6    -.979468
     -.020303726   .002732754    .00676179          .1   .16417363
       .02085972   -.04061341    .07764363          .3   -.3391408
       .04980183  -.023606777    .05618048        -1.1   -.1692508
      .011543274 -.0044965744    .05679584          .5  -.27414608
     -.036082268  -.015342474   -.05182862         -.7   .06894309
       .01897907   .005304575   -.06399655          .8  .019889154
       .06870365   .035532236   -.06899428        -1.1   -.1504912
      -.02629471     -.492239   -.06177926           0    .1398328
     -.005705833    -.3213961    .01131153         -.1   .28220645
    -.0007314682            0 -.0021862984          .4   1.9575448
       .07444286     .1625726   .011133432         -.6    .7993081
      -.04241371    .19018364   -.05986404          .7   1.1553462
      .003426552    .03786588   -.04718626         -.6   -.2632084
      -.03904152   .029469013  .0028271675          .4    -1.80022
       .09070873  -.064515114   -.03897548         -.3   -.4852419
       -.0380516   -.11970901  -.016815186          .6   -.3382464
      -.03488922    .02114606  -.017273188          .4  -.05461295
     -.009062767   -.13296938    .08864713          .5   -.4068208
       .06791592  -.069060326   -.03344822          .5   -.5988197
      -.05028057    .25841665   .016834259          .9  -1.3222104
       .02255535    .08156276     .0415448 -.033333335 -.016248424
     -.024207115   -.05910301   .004276037   .26666668    -.159935
       .07222748   .072547674  -.027472496         -.1  -.21699703
      -.02434349    .03893995   -.04696953    .7333333  .064706445
     -.025891304   -.20725727  -.006798387         -.5   -.5352536
     -.011367798     .4835284   -.05305231  .033333335 -.026493566
        .0831728     .1891837   -.04859436   -.3666667    .7205932
       -.0319252    -.4457831   .018657684    .7666667    -.624119
      .013855934   -.07966495    .12299943   -.3666667  -.09950262
     -.028817177    .05793595   .008721352   .23333333   -.3029495
       .06528664   .022568226  -.063886166  .033333335   -.9227142
       .00262928    -.1264615  -.005768895          .6    -.235843
     -.030332565     .1171906  -.006651998  -.13333334   .08376388
      .008387566   .015793324   -.08576798  .033333335  -.11639638
       .05217743   -.05341005    .09891403   -.3666667  -.06327721
      -.03020191   -.05233955    .08356285    .6333333    .3614076
     -.012756348 .00018525124   -.01551175  -.16666667   -.1864905
      .016050339      -.10499    .05739963           0  -.26853305
        .0934496   -.07940865    .01007378   -.7666667  -.16460283
      -.04366684   -.07587433   .015948415          .3   -.7418476
       .00847435    .15959454  -.031848192  .033333335  -.26816398
      -.02486992    .04682732   -.05193007         -.3    .5646817
       .09761047  -.026546717  -.016186953         -.4    .2017622
      -.02917862   .036661625  -.032115936   .56666666    .9194045
     -.031635284    .05387354   -.04464781   -.3333333  .033250786
       .02602291    -.1004212   .010604978         -.4   -.3688772
       .07105446   .032122374 -.0038758516         -.6   -.1604253
     -.011328697     .0757897    .02155018          .8   -1.267848
     -.030052185    .06210089   .018499613           0   .09279093
      .029580116     .0570159   -.01876986  -.23333333    .3933002
       .04030895    .11149788   .003127813  -.53333336    .3908738
     -.017730713   -.08976126     .0299412  .033333335    1.288968
       .03354168   -.13125277    .06529093 -.033333335   -.3671627
     -.025523186    .00897336    .05278087  -.26666668   -.4056301
        .0763483   .009778738   -.04578638   -.7666667  -.06284544
      -.01279831   -.28532577    .05636358          .1  -.07036417
      -.02697754  -.064397335  -.003437281   .16666667   .08619802
      -.02005291  -.021053314    .01630497   -.3666667   .04336648
       .06525898   -.09287786  -.019602537         -.6   .03437156
      -.02033615  -.017594099   .022954226          .3  -.06871117
     -.023492813     .3197281   .017477036   .16666667   .22185943
      .013630867     .2431948   .005753994   .23333333  -.42495185
       .07452679    .15230894   .006227255 -.033333335     .635814
    -.0006017685    .11157179    .04070139   .23333333   .20604932
       -.0603199   .005619764    .06567001         -.2   .02448303
      .008555412    .11014366   .019916296   .13333334    .5073769
       .06538296  -.007164478   .032980442         -.3   -.3121837
     -.005785942   -.12935114   -.04024959          .3    .4127289
      -.04561424   .024876595   .032016277  .033333335    .4161568
      .010370255   -.05828905  -.020018816          .2    -1.38022
       .06894302   -.26657724  -.010724306         -.2  -.54820776
      -.04633999     .0800693  .0009560585    .3666667   -.9773316
       .02115917     .1861112   -.08499837           0  -.56555325
      -.03976345   .066512346   -.08406281  -.06666667    .9514818
       .07687569  -.007452488   -.02767825  -.13333334    .8089243
      -.02139473     .1587529   -.03637564    .4333333    2.376654
      -.04574585   -.16814756  -.006904006    .3666667   -2.358829
      .011060715     .0691607    .04578185          .1   -.3375081
      .064902306    .03383112     -.058622   -.3333333   -.6932737
      .014725685    .09015703  -.001775503  .033333335   -2.642757
      -.03930473    .10330415  -.006779671          .2   2.2560117
     -.018507004    .12952352 .00048577785   .16666667    .3781398
       .08005524    .05228329    -.0803665   -.3666667  .035423394
    end
    Based on my estimation sample, the FPE, AIC, HQIC picked 4 lags while the SBIC chose 1 lag. I understand that the FPE and AIC tend to overestimate estimate the lag order even in infinite samples while the SBIC and HQIC are generally quite accurate in in selecting the true lag order. In my case, the SBIC predicted 1 lag while the HQIC predicted 5 lags and can I, based on the fact that the other information criteria also chose 5 lags, consider my differenced variables to contain 5 lags?

    varbasic Dlrgdp Dlop Dlexc Dunp Dinf, lags(1 2 3 4 5)

  • #2
    This your second posting today. You need to be a little considerate in your requests. You need to follow the FAQ on asking questions - we don't even know exactly what you've run. As with the other one, you didn't get a quick answer. This may reflect a lack of interest in var models among those who answer question on this list serve.

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