st: Gllamm for location choice with location specific variables

[Paulo Guimaraes <guimarap@musc.edu>]

Dear Kevin,

I suspect that if you want to estimate the conditional logit model for a 
location choice model (where the
number of alternatives is typically very large) then GLLAMM may not be a 
viable alternative.
If all you want is to add a random effect to the profit specification 
you may want to look at the Dirichlet-Multinomial
model, which is a generalization of the conditional logit model  and 
works well with large choice sets.
There is a stata command to estimate the dirichlet-multinomial - see my 
presentation in the NASUG

http://ideas.repec.org/p/boc/asug06/7.html

Hope this helps

Paulo Guimaraes




> Date: Sat, 18 Nov 2006 21:49:20 +0000
> From: Xiaoheng Zhang <zhangx@tcd.ie>
> Subject: st: Gllamm for location choice with location specific variables
>
> Dear all,
>
> I am working on the conditional logit model to look for the determinants of
> multinational's location choice of new firms. I used the traditional -CLOGIT-
> command and decided to go further using -GLLAMM-.
>
> I redid the discrete choice model example in GLLAMM's manual(Rabe-Hesketh et
> al.2004) in Chatper 9.Unfortunately in that example only one explanatory
> variable was used and this variable is choicer specific variable-SEX-.In my case
> I have some country level variables,i.e. tax rate as well as firm level
> variables(nationality) but I cannot figure out how to put both knid of variables
> into the model.Besides, my computer took 15 hours to maximize the likelihood but
> end up with nothing so I can not even try different combinations..........
>
> Anyone having experiences can give me a hint on how to do it?Data is already in
> the "expand" form as required by -CLOGIT-.
>
> Thanks a lot!
>
> Kevin in Dublin
>
> *
> *   For searches and help try:
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>
> ------------------------------
>
> Date: Sun, 19 Nov 2006 08:47:59 -0500
> From: Kit Baum <baum@bc.edu>
> Subject: st: ivreg2 updated 
> The -ivreg2- package of Baum, Schaffer, Stillman has been updated. We  
> have added an improved test for weak instruments---the Cragg/Donald  
> test---for which critical values are available from the work of Jim  
> Stock and Moto Yogo. We thank them for permission to reproduce their  
> published critical values in our code.
>
> The ivreg2 program's output now features hyperlinks to the relevant  
> section of the help file for a number of the statistics reported. The  
> help file itself has been extensively redone with embedded hyperlinks  
> and section headings to ease navigation.
>
> ivreg2 requires Stata 8.2 or better. Users of Stata 7 may use the  
> version accessible from the Stata Journal. You may download the  
> updated ivreg2 using the ssc command or by adoupdate. Please do not  
> download these routines with a web browser, especially in a Windows  
> environment.
>
> We thank the many users who have helped us improve this routine. We  
> are working on more formal documentation of its enhanced abilities,  
> and will circulate that when it is completed. The ivreg2 package  
> includes, as an ancillary file, the certification script which we use  
> to test its reliability. For more information on Stata software  
> certification, please see Bill Gould's paper
> http://ideas.repec.org/a/tsj/stataj/v1y2001i1p29-50.html
>
> Kit
>
> Kit Baum, Boston College Economics
> http://ideas.repec.org/e/pba1.html
> An Introduction to Modern Econometrics Using Stata:
> http://www.stata-press.com/books/imeus.html
>
>
> *
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>
> ------------------------------
>
> Date: Sun, 19 Nov 2006 07:14:41 -0800 (PST)
> From: george owuor <gowuor2001@yahoo.com>
> Subject: [none]
>
> Dear all,
>
> i am running instrumental variables estimations. y=f(X,W),  and W is endogenours,  so stage one becomes W=f(Z), and stage 2 becomes  y=f(X, Predicted W). My function is aproduction function with conventional inputs such as fertiliser, seeds, labour and then credit which is the (W).  Must the number of RHS variables  in stage one be the same number as RHS ones in stage two.
>
> Please help.
>
> Owuor
>
>
>
> ____________________________________________________________________________________
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>
> ------------------------------
>
> Date: Sun, 19 Nov 2006 15:39:12 +0000
> From: Socrates Mokkas <socrates.mokkas@economics.oxford.ac.uk>
> Subject: st: Join String Variables
>
> Hi People,
>
> OK, I know how to split string variables but have not found a way to join string variables. Did a search but could not source something out. Can you direct me to a command? Or if not is there a way round it. I just want to put two or more strings in one even if missing values exist. For example,
>
> obs     Var1     Var2    Var3       Var3
> 1          A        B       K        ABK
> 2                   C                  C
> 3          D               ED        BED
>
> I have Var1 and Var2 and want to create Var3.
> Thanks a lot.
>
> Socrates Mokkas
> *
> *   For searches and help try:
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> *   http://www.stata.com/support/statalist/faq
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>
> ------------------------------
>
> Date: Sun, 19 Nov 2006 16:45:01 +0100
> From: "Daniel Stegmueller" <d.stegmueller@gmail.com>
> Subject: Re: st: RE: rename individual columns/rows of a matrix
>
> Nick,
>
> thank you very much for your suggestions!
>
> Best,
> Daniel
>
>
>
>
> 2006/11/17, Nick Cox <n.j.cox@durham.ac.uk>:
>  
>
> > I think whatever you do will end in something like
> >
> > matrix rownames ... = ...
> >
> > or
> >
> > matrix colnames ... = ...
> >
> > where the RHS includes the new names. This is adoable,
> > as I understand it. The question is whether the result
> > is any less awkward than doing it directly. Here is one stab,
> > not tested much.
> >
> > -------------------------------------------- matrcrename.ado
> > // NJC 1.0.0 17 November 2006
> > // matrix row_or_column rename
> > program matrcrename
> >        version 8
> >        // syntax matrixname row_or_col which_row_or_col new_name
> >
> >        // matrix name
> >        gettoken matrix 0 : 0
> >        confirm matrix `matrix'
> >
> >        // row or column
> >        gettoken which 0 : 0
> >        local length = length("`which'")
> >        if lower("`which'") == substr("row",1,`length') {
> >                local which row
> >        }
> >        else if lower("`which'") == substr("column",1,`length') {
> >                local which col
> >        }
> >        else {
> >                di as err "second argument should specify row or column"
> >                exit 198
> >        }
> >
> >        // which row or column
> >        gettoken where newname : 0
> >        if "`which'" == "row" {
> >                capture local found = inrange(`where', 1, rowsof(`matrix'))
> >                if _rc {
> >                        di as err "inappropriate row number?"
> >                        exit 498
> >                }
> >                if !`found' {
> >                        di as err "row out of range"
> >                        exit 498
> >                }
> >        }
> >        else {
> >                capture local found = inrange(`where', 1, colsof(`matrix'))
> >                if _rc {
> >                        di as err "inappropriate column number?"
> >                        exit 498
> >                }
> >                if !`found' {
> >                        di as err "column out of range"
> >                        exit 498
> >                }
> >        }
> >
> >        // test newname
> >        tempname moo
> >        matrix `moo' = J(1,1,1)
> >        capture matrix rownames `moo' = `newname'
> >        if _rc {
> >                local what = cond("`which'" == "col", "column", "row")
> >                di as err "inappropriate `what' name?"
> >                exit 498
> >        }
> >
> >        // in business!
> >        local names : `which'names `matrix'
> >        tokenize `names'
> >        local `where' `newname'
> >        local newnames "`*'"
> >        matrix `which'names `matrix' = `newnames'
> > end
> > --------------------------------------------
> >
> > Examples:
> > -----------------------------------------------------------------------------------------------------------
> > . mat li z
> >
> > symmetric z[3,3]
> >   X  Y  Z
> > a  1
> > b  1  1
> > c  1  1  1
> >
> > . matrcrename z row 3 Stata
> >
> > . mat li z
> >
> > symmetric z[3,3]
> >       X  Y  Z
> >    a  1
> >    b  1  1
> > Stata  1  1  1
> >
> > . matrcrename z col 4 SAS
> > column out of range
> > r(498);
> >
> > . matrcrename z col 3 Some Alternative Software
> > inappropriate column name?
> > r(498);
> >
> > . matrcrename frog col 3 toad
> > matrix frog not found
> > r(111);
> >
> > ----------------------------------------------------------------------------------------------------------
> >
> > Nick
> > n.j.cox@durham.ac.uk
> >
> > Daniel Stegmueller
> >
> >    
> >
> > > is there a quick way to change individual columns or rows of a matrix?
> > > The 'matrix rownames' command is not useful, since I want to use a
> > > loop to rename rows and columns step-by step.
> > >      
> > *
> > *   For searches and help try:
> > *   http://www.stata.com/support/faqs/res/findit.html
> > *   http://www.stata.com/support/statalist/faq
> > *   http://www.ats.ucla.edu/stat/stata/
> >
> >    
>
> - -- 
> Blore's Razor:
>        Given a choice between two theories, take the one which is funnier.
>
>
> - ------------------------------------------------------------
> Daniel Stegm�ller
> Elisabethstr. 3
> 68165 Mannheim
>
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>
> ------------------------------
>
> Date: Sun, 19 Nov 2006 10:59:58 -0500
> From: Kit Baum <baum@bc.edu>
> Subject: st: instrumental variables
>
> George said
>
> i am running instrumental variables estimations. y=f(X,W),  and W is  
> endogenours,  so stage one becomes W=f(Z), and stage 2 becomes  y=f 
> (X, Predicted W). My function is aproduction function with  
> conventional inputs such as fertiliser, seeds, labour and then credit  
> which is the (W).  Must the number of RHS variables  in stage one be  
> the same number as RHS ones in stage two.
>
> George should heed the Statalist FAQ and use informative subject  
> headings on his postings.
>
> He should read any textbook discussion of instrumental variables /  
> two stage least squares. He might also find the Baum/Schaffer/ 
> Stillman Stata Journal article useful; a working paper version can be  
> accessed from
> http://ideas.repec.org/a/tsj/stataj/v3y2003i1p1-31.html
>
> One does not run the first stage and second stage as separate  
> regressions. The number of included endogenous variables (one in his  
> example, W) must be less than or equal to the number of excluded  
> instruments. His mention of Z does not make clear whether that is a  
> variable or a matrix of variables. If Z is a single variable, the  
> equation would be exactly identified via the order condition. It  
> would be preferable if the equation were overidentified---if Z  
> contained more than one column---for then Sargan/Hansen tests for  
> overidentifying restrictions could shed some light on the adequacy of  
> the instruments.
>
> Kit Baum, Boston College Economics
> http://ideas.repec.org/e/pba1.html
> An Introduction to Modern Econometrics Using Stata:
> http://www.stata-press.com/books/imeus.html
>
>
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>
> ------------------------------
>
> Date: Sun, 19 Nov 2006 17:06:01 +0100
> From: "Ingo Brooks" <ingo.brooks@gmail.com>
> Subject: Re: st: drop in a do-file
>
> Joe,
>
> I think the problem should be solved by defining -km`i'- to be a
> - -tempname-, see -help tempname-.
>
> Hope this helps,
> Ingo
>
>
> On 11/19/06, Joe Trubisz <jtrubisz@mac.com> wrote:
>  
>
> > OK...that's useful, but can you explain the following sequence of
> > commands (some output supressed):
> >
> > .infile str15 disease  v1  v2  v3  v4  v5  v6  v7  v8  v9  v10  v11
> > v12  v13  v14  v15  v16 using "/Users/h/ data/
> > CollectedBucketsL16.txt",clear
> >
> > . do clusterk 4
> > . cap: drop km*  <--- added this as you suggest to the do file
> > . local low = `1' - 2
> > . local high = `1' + 4
> > . forvalues i=`low'/`high' {
> >   2.   cluster kmeans v1-v`1', k(`i') name(km`i')
> >   3.   cluster stop km`i'
> >   4. }
> >
> > This works...but if I follow it with the same command again as in:
> >
> > . do clusterk 4
> > . cap: drop km*
> > . local low = `1' - 2
> > . local high = `1' + 4
> > . forvalues i=`low'/`high' {
> >   2.   cluster kmeans v1-v`1', k(`i') name(km`i')
> >   3.   cluster stop km`i'
> >   4. }
> > km2 already defined
> > r(198);
> >
> > . display km2
> > km2 not found
> > r(111);
> >
> > If  I run it again, it works. However, if I manually drop km* (first
> > line below) and issue the command again, I get the following:
> >
> > . drop km*     <--- I typed this in
> > . do clusterk 4
> > . cap: drop km*
> > . local low = `1' - 2
> > . local high = `1' + 4
> > . forvalues i=`low'/`high' {
> >   2.   cluster kmeans v1-v`1', k(`i') name(km`i')
> >   3.   cluster stop km`i'
> >   4. }
> > km2 already defined
> > r(198);
> >
> > If I run do clusterk 4 now, it works.
> >
> > Any suggestions?
> >
> > TIA,
> > Joe
> >
> >
> > On Nov 18, 2006, at 8:56 PM, Kit Baum wrote:
> >
> >    
> >
> > > Joseph writes
> > >
> > > I am automating a bunch of commands in a do file, so I can rerun
> > > the do file, just changing the argument.
> > >
> > > If I have a:
> > >
> > > drop km*
> > >
> > > in my do file, the first time thru, it fails because it can't drop it.
> > >
> > > No problem, since I can run as: do clusterk 4, nostop
> > > and it goes fine.
> > >
> > > However, if I rerun the next time thru as: do clusterk 6, nostop,
> > > it fails with error number 198,
> > > saying that variable km2 exists. You can see that the drop works
> > > though, since it disappears
> > > from the variables window.
> > >
> > >
> > >
> > > help capture
> > >
> > >
> > > Kit Baum, Boston College Economics
> > > http://ideas.repec.org/e/pba1.html
> > > An Introduction to Modern Econometrics Using Stata:
> > > http://www.stata-press.com/books/imeus.html
> > >
> > >
> > > *
> > > *   For searches and help try:
> > > *   http://www.stata.com/support/faqs/res/findit.html
> > > *   http://www.stata.com/support/statalist/faq
> > > *   http://www.ats.ucla.edu/stat/stata/
> > >      
> > *
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> >
> >    
> *
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>
> ------------------------------
>
> Date: Sun, 19 Nov 2006 17:28:27 +0100
> From: "Svend Juul" <SJ@SOCI.AU.DK>
> Subject: Re: st: Join String Variables
>
> Socrates wrote: 
> OK, I know how to split string variables but have not found a way to join string variables. Did a search but could not source something out. Can you direct me to a command? Or if not is there a way round it. I just want to put two or more strings in one even if missing values exist. For example,
>
> obs     Var1     Var2    Var3       Var3
> 1          A        B       K        ABK
> 2                   C                  C
> 3          D               ED        BED
>
> I have Var1 and Var2 and want to create Var3.
> - ----------------------------------------
>
> Assuming that you want to create var4 from var1, var2, and var3:
>
>   generate var4 = var1+var2+var3
>
> You might also want to study:
>
>   help string functions
>
> Hope this helps
> Svend
>
> ________________________________________________________ 
> Svend Juul
> Institut for Folkesundhed, Afdeling for Epidemiologi
> (Institute of Public Health, Department of Epidemiology)
> Vennelyst Boulevard 6 
> DK-8000 Aarhus C,  Denmark 
> Phone, work:  +45 8942 6090 
> Phone, home:  +45 8693 7796 
> Fax:          +45 8613 1580 
> E-mail:       sj@soci.au.dk 
> _________________________________________________________ 
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>
> ------------------------------
>
> Date: Sun, 19 Nov 2006 16:50:10 -0000
> From: "Nick Cox" <n.j.cox@durham.ac.uk>
> Subject: RE: st: Join String Variables
>
> In addition, 
> egen Var4 = concat(Var1 Var2 Var3) 
> In this example, -egen, concat()- gains you 
> nothing, but it has some other features that 
> make it more worthwhile. 
> Nick 
> n.j.cox@durham.ac.uk 
> Svend Juul
>
>  
>
> > Socrates wrote: 
> > OK, I know how to split string variables but have not found a 
> > way to join string variables. Did a search but could not 
> > source something out. Can you direct me to a command? Or if 
> > not is there a way round it. I just want to put two or more 
> > strings in one even if missing values exist. For example,
> >
> > obs     Var1     Var2    Var3       Var3
> > 1          A        B       K        ABK
> > 2                   C                  C
> > 3          D               ED        BED
> >
> > I have Var1 and Var2 and want to create Var3.
> > ----------------------------------------
> >
> > Assuming that you want to create var4 from var1, var2, and var3:
> >
> >   generate var4 = var1+var2+var3
> >
> > You might also want to study:
> >
> >   help string functions
> >    
> *
> *   For searches and help try:
> *   http://www.stata.com/support/faqs/res/findit.html
> *   http://www.stata.com/support/statalist/faq
> *   http://www.ats.ucla.edu/stat/stata/
>
> ------------------------------
>
> Date: Sun, 19 Nov 2006 17:23:57 -0000
> From: "Nick Cox" <n.j.cox@durham.ac.uk>
> Subject: RE: st: Data Manipulation Question
>
> This is an FAQ.  
> replace Parent = Parent[_n-1] if missing(Parent) 
> would work in this example. 
> More generally, see 
> How can I replace missing values with previous or following nonmissing values?
> How can I replace missing values within sequences?
> http://www.stata.com/support/faqs/data/missing.html
>
> Bob Yaffee's approach based on pretending that this is a panel 
> data set can thus be avoided. His further suggestion of
> using -destring- wouldn't work, as -Parent- has no numeric 
> interpretation,  and is also unnecessary, as the logic of 
> the device above applies to both numeric and string variables. 
> Nick 
> n.j.cox@durham.ac.uk 
> Socrates Mokkas 
>  
>
> > I have a question related to data manipulation. My data sample is
> > like that:
> >
> > Parent       Subsidiary
> > A            B
> >             C
> >             D
> >             F
> > X            J
> >             L
> > Z            T
> >
> > What I want is to fill the gaps of the ParName.
> >    
> *
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>
> ------------------------------
>
> Date: Sun, 19 Nov 2006 12:25:39 -0500
> From: Robert A Yaffee <bob.yaffee@nyu.edu>
> Subject: Re: st: Join String Variables
>
> Socrates,
> Try egen Var3=concat(Var1 Var2 Var3)
>  Regards,
>     Robert
>
> Robert A. Yaffee, Ph.D.
> Research Professor
> Shirley M. Ehrenkranz
> School of Social Work
> New York University
>
> home address:
> Apt 19-W
> 2100 Linwood Ave.
> Fort Lee, NJ
> 07024-3171
> Phone: 201-242-3824
> Fax: 201-242-3825
> yaffee@nyu.edu
>
> - ----- Original Message -----
> From: Socrates Mokkas <socrates.mokkas@economics.oxford.ac.uk>
> Date: Sunday, November 19, 2006 10:39 am
> Subject: st: Join String Variables
>
>  
>
> > Hi People,
> >
> > OK, I know how to split string variables but have not found a way 
> > to join string variables. Did a search but could not source 
> > something out. Can you direct me to a command? Or if not is there a 
> > way round it. I just want to put two or more strings in one even if 
> > missing values exist. For example,
> >
> > obs     Var1     Var2    Var3       Var3
> > 1          A        B       K        ABK
> > 2                   C                  C
> > 3          D               ED        BED
> >
> > I have Var1 and Var2 and want to create Var3.
> > Thanks a lot.
> >
> > Socrates Mokkas
> > *
> > *   For searches and help try:
> > *   http://www.stata.com/support/faqs/res/findit.html
> > *   http://www.stata.com/support/statalist/faq
> > *   http://www.ats.ucla.edu/stat/stata/
> >
> >    
> *
> *   For searches and help try:
> *   http://www.stata.com/support/faqs/res/findit.html
> *   http://www.stata.com/support/statalist/faq
> *   http://www.ats.ucla.edu/stat/stata/
>
> ------------------------------
>
> Date: Sun, 19 Nov 2006 17:54:41 -0000
> From: "Nick Cox" <n.j.cox@durham.ac.uk>
> Subject: RE: st: Join String Variables
>
> Note that this won't work, as -egen- never -replace-s. 
> If you did want to overwrite -Var3-, 
> egen temp = concat(Var1 Var2 Var3) 
> replace Var3 = temp
> drop temp 
> Nick 
> n.j.cox@durham.ac.uk 
> Robert A Yaffee
>
>  
>
> > Try egen Var3=concat(Var1 Var2 Var3)
> >    
> Socrates Mokkas
>
>  
>
> > > I just want to put two or more strings in one even if 
> > > missing values exist. For example,
> > >
> > > obs     Var1     Var2    Var3       Var3
> > > 1          A        B       K        ABK
> > > 2                   C                  C
> > > 3          D               ED        BED
> > >
> > > I have Var1 and Var2 and want to create Var3.
> > > Thanks a lot.
> > >      
> *
> *   For searches and help try:
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>
> ------------------------------
>
> Date: Sun, 19 Nov 2006 13:52:38 -0500
> From: "John P. Bigelow" <J.Bigelow@EconGroup.Com>
> Subject: st: Re:  st Variable dropped from regression: how to capture event?
>
> - - --- Friedrich Huebler <huebler@rocketmail.com> wrote:
>  
>
> > I am running a loop of regressions that should only be completed when 
> > all variables are included. In case a variable is dropped I want to 
> > skip the rest of the loop and continue with the next regression.
> > The regression still runs, but with an incomplete set of variables.
> > How can I check whether a variable was dropped? 
> >    
> As an alternative to some of the suggestions that have been offered already,
> you could test the variable list without even running the regression by
> using the - _rmcoll - command. or - _rmdcoll - command.
>
> Say you want to regress Y on X1 X2 X3, but only if the X variables are
> non-collinear.
> Before running the regression set up with
>
> local depvar = "X1 X2 X3"
>
> then run
>
> _rmcoll `depvar'
>
> _rmcoll will return in r(varlist) a list of non-collinear variables found in
> `depvar'
>
> If `r(varlist)' and `depvar' are the same go ahead and run
>
> reg Y `depvar'
>
> otherwise skip it.
>
> John Bigelow
>
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> 4:48 PM
>
>
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>
> ------------------------------
>
> Date: Sun, 19 Nov 2006 22:46:33 +0100
> From: "Alessandro Fiaschi" <alefiaschi@gmail.com>
> Subject: st: frequency distribution (graphic)
>
> Dear all, I would like to do graphic descriptions of all the variables
> of my panel (firm data, ten years), to show some appearance of
> non-normality. In particular, I'm interested in making an histogram
> with frequency distribution for each variable (x = values of variable,
> y = fraction). Thanks in advance for any help.
>
> Alex
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>
> ------------------------------
>
> Date: Sun, 19 Nov 2006 22:33:07 +0000 (GMT)
> From: Maarten buis <maartenbuis@yahoo.co.uk>
> Subject: Re: st: frequency distribution (graphic)
>
> - --- Alessandro Fiaschi <alefiaschi@gmail.com> wrote:
>  
>
> > I would like to do graphic descriptions of all the variables
> > of my panel (firm data, ten years), to show some appearance of
> > non-normality. In particular, I'm interested in making an histogram
> > with frequency distribution for each variable 
> >    
> Alex:
> have a look at -help twoway histogram-, in particular look at the -by-
> option (I am assuming you actually don't want to compare different
> variables, but the distribution of the same variable for different
> firms). If you really want to put histograms of different variables in
> the same graph, look at -help graph combine-.
>
> HTH,
> Maarten
>
>
> - -----------------------------------------
> Maarten L. Buis
> Department of Social Research Methodology
> Vrije Universiteit Amsterdam
> Boelelaan 1081
> 1081 HV Amsterdam
> The Netherlands
>
> visiting address:
> Buitenveldertselaan 3 (Metropolitan), room Z434
>
> +31 20 5986715
>
> http://home.fsw.vu.nl/m.buis/
> - -----------------------------------------
>
> Send instant messages to your online friends http://uk.messenger.yahoo.com 
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> ------------------------------
>
> End of statalist-digest V4 #2526
> ********************************
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