[Limdep Nlogit List] testing the list is now operational again

Sat Feb 18 21:46:28 AEDT 2017

Dear professor Greene
Adding sample from 1 to N works well.
Thank you.
Regards

Zein Kallas Calot, Ph.D.
Universitat Politènica de Catalunya-UPC/Escola Superior d’Agricultura de Barcelona-ESAB
Professor Agregat- Departament d'Enginyeria Agroalimentària i Biotecnologia-DEAB
Investigador- Centre de Recerca en Economia i Desenvolupament Agroalimentari CREDA-UPC-IRTA
Zein.kallas at upc.edu
http://www.creda.es/personnel/en

-----Mensaje original-----
De: Limdep [mailto:limdep-bounces at limdep.itls.usyd.edu.au] En nombre de William Greene
Enviado el: 16 February 2017 21:01
Para: Limdep and Nlogit Mailing List <limdep at limdep.itls.usyd.edu.au>
Asunto: Re: [Limdep Nlogit List] testing the list is now operational again

Zein. Before your plot, use SAMPLE to set the sample to the rows you want to plot.  Since you
extracted the values from matrices, that would be 1 to N where you have 1 to 24*N.
/Bill Greene

On Thu, Feb 16, 2017 at 8:27 AM, Zein Kallas Calot <zein.kallas at upc.edu>
wrote:

> Dear all,
> I followed the Nlogit 5 reference guide manual on page N-567 to 
> calculate the conditional confidence interval of parameters for each 
> individual after estimating an RPL model.
> This is the code that I
> used (example with 2 random attribute for simplicity)
>
> CALC ; Ran (12345) $
> NLOGIT;Lhs=YC1;Choices=ALT1,ALT2,NO;
> Rhs=A1,A2,A3,A4
> ;RPL;Fcn=A1(n),A2(n)
> ;PDS=8
> ;halton
> ;parameters
> $
>
> the conditional confidence interval of parameters
>
> MATRIX ; bn = beta_i ; sn = sdbeta_i $
>
> CREATE ; bA1n = 0 ; bA2n = 0 $
> CREATE ; sA1n = 0 ; sA2n = 0 $
> NAMELIST ; betan = bA1n, bA2n $
> NAMELIST ; sbetan = sA1n, sA2n $
> CREATE ; betan = bn $
> CREATE ; sbetan = sn $
>
> CREATE ; vbA1n = sA1n^2 ; vbA2n = sA2n^2 $
>
> CALC ; List ; sdbA1n = Sqr(xbr(vbA1n) + Var(bA1n))
>                       ; sdbA2n = Sqr(xbr(vbA2n) + Var(bA2n)) $
>
> CREATE ; lowerbA1 = bA1n - 2*sA1n ; upperbA1 = bA1n + 2*sA1n $ CREATE 
> ; lowerbA2 = bA2n - 2*sA2n ; upperbA2 = bA2n + 2*sA2n $
>
> CREATE ; person = Trn(1,1) $
>
> CALC ; meanbA1n = Xbr(bA1n) $
> CALC ; highbA1n = meanbA1n + 2*sdbA1n $ CALC ; lowbA1n = meanbA1n - 
> 2*sdbA1n $
>
> CALC ; meanbA2n = Xbr(bA2n) $
> CALC ; highbA2n = meanbA2n + 2*sdbA2n $ CALC ; lowbA2n = meanbA2n - 
> 2*sdbA2n $
>
> PLOT ; Lhs = person ; Rhs = lowerbA1,upperbA1 ; Centipede ; Title = 
> Confidence Limits for b_A1 for normal Model ; Bars = 
> meanbA1n,highbA1n,lowbA1n  $
>
> PLOT ; Lhs = person ; Rhs = lowerbA2,upperbA2 ; Centipede ; Title = 
> Confidence Limits for b_A2 for normal Model ; Bars = 
> meanbA2n,highbA2n,lowbA2n  $
>
> Questions:
> 1.      Is this code correct? Or I missed something?
> 2.      The Figures were plotted for each row in the data and not each
> person (i.e. for the total
> number of rows: Number of persons * 8 choice sets * 3 alternatives). 
> How can I correct for that to obtain a similar figure of the Manual 
> (Figure N29.7)
> 3.      Is it possible to extract the values of the confidence interval by
> person and attribute in a
> separate data set?
>
> Best regards
>
> Zein Kallas
> CREDA
> Barcelona
>
> -----Mensaje original-----
> De: Limdep [mailto:limdep-bounces at itls.usyd.edu.au] En nombre de David 
> Hensher via Limdep Enviado el: 10 February 2017 02:43
> Para: limdep at itls.usyd.edu.au
> CC: David Hensher <david.hensher at sydney.edu.au>
> Asunto: [Limdep Nlogit List] testing the list is now operational again
>
> This is a test only
>
> David
>
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William Greene
Department of Economics
Stern School of Business, New York University
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