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SV: st: problems with nlsur aids


From   Mintewab Bezabih <Mintewab.Bezabih@economics.gu.se>
To   "statalist@hsphsun2.harvard.edu" <statalist@hsphsun2.harvard.edu>
Subject   SV: st: problems with nlsur aids
Date   Sun, 6 Nov 2011 00:05:10 +0100

Thanks Jorge. It helped indeed. As per your suggestion below, I managed to generate the missing coefficients  and got  right the calling of the coeficients . When I run the elasticity part, thou, the problem resurfaces (when I put -set trace- and try to see the mistake, it tells me either 'wmean not found' or '[b1] not found). Below is the updated codes, for your kind guidance through what it is I am doing wrong.

many thanks once again.

minti



nlcom ${com} (a13:1-_b[/a1]-_b[/a2]-_b[/a3]-_b[/a4]-_b[/a5]-_b[/a6]-_b[/a7]-_b[/a8]-_b[/a9]-_b[/a10]-_b[/a11]-_b[/a12]) ///
(b13:-_b[/b1]-_b[/b2]-_b[/b3]-_b[/b4]-_b[/b5]-_b[/b6]-_b[/b7]-_b[/b8]-_b[/b9]-_b[/b10]-_b[/b11]-_b[/b12]) ///
(g131:-_b[/g${l11}] - _b[/g${l21}] -_b[/g${l31}] -_b[/g${l41}] - _b[/g${l51}] - _b[/g${l61}] - _b[/g${l71}] - _b[/g${l81}] - _b[/g${l91}] -_b[/g${l101}] - _b[/g${l111}] - _b[/g${l121}] ) ///
(g132:-_b[/g${l12}] - _b[/g${l22}]) (g133:-_b[/g${l13}] - _b[/g${l23}]) ///
(g134:-_b[/g${l14}] - _b[/g${l24}]) ///
(g135:-_b[/g${l15}] - _b[/g${l25}]) ///
(g136:-_b[/g${l16}] - _b[/g${l26}]) ///
(g137:-_b[/g${l17}] - _b[/g${l27}]) ///
(g138:-_b[/g${l18}] - _b[/g${l28}]) ///
(g139:-_b[/g${l19}] - _b[/g${l29}]) ///
(g1310:-_b[/g${l110}] - _b[/g${l210}]) ///
(g1311:-_b[/g${l111}] - _b[/g${l211}]) ///
*** here stata kept on telling me there is no g213 so I changed it to g212 and then I got this particular nlcom to run.
(g1312:-_b[/g${l112}] - _b[/g${l212}])(g1313:-_b[/g${l113}] - _b[/g${l212}]) , noheader post



**********************THE ELASTICITY PART**************************************
******************************************************************************

*set trace on
*set tracedepth 4

est store aidsminti

quietly {
foreach x of varlist w* lnp* lnexp {
sum `x'
scalar `x'mean=r(mean)
}
* Price indexes
glo asum "_b[a1]*lnp1mean"
forv i=2(1)13 {
glo asum "${asum} + _b[a`i']*lnp`i'mean"
}
glo gsum ""
forv i=1(1)13 {
forv j=1(1)13 {
glo gsum "${gsum} + 0.5*_b[g`i'`j']*lnp`i'mean*lnp`j'mean"
}
}
*glo ap "4.7 + ${asum} ${gsum}"
*glo bp "_b[b1]*lnp1mean"
*forv i=2(1)13 {
*glo bp "${bp} + _b[b`i']*lnp`i'mean"
*}
*glo bp "(exp(${bp}))"
* Mus
forv i=1(1)13 {
glo mu`i' "_b[b`i'] "
}
forv j=1(1)13 {
glo gsum2`j' ""
forv k=1(1)13 {
glo gsum2`j' "${gsum2`j'} + _b[g`j'`k']*lnp`k'mean"
}
}
}
forv i=1(1)13 {
forv j=1(1)13 {
glo delta=cond(`i'==`j',1,0)
glo mu`i'`j' "_b[g`i'`j'] - ${mu`i'}*(_b[a`j'] ${gsum2`j'})-_b[l`i']*_b[b`j']"
* If expression is too long, split it
cap nlcom (elasgasto`i': ${mu`i'}/w`i'mean + 1)(mu`i'`j':${mu`i'`j'}), post noheader
if _rc {
qui nlcom (elasgasto`i': ${mu`i'}/w`i'mean + 1) (mu`i'`j'f:(1e+2)*(${mu`i'`j'})), post noheader
qui nlcom (elasgasto`i': _b[elasgasto`i']) (mu`i'`j':_b[mu`i'`j'f]/(1e+2)), post noheader
}
}
}
* Uncompensated price elasticity
nlcom (elasgasto`i': _b[elasgasto`i'])(elpnc`i'`j':_b[mu`i'`j']/w`i'mean - ${delta})  , post noheader
* Compensated price elasticity
nlcom (elpc`i'`j': _b[elpnc`i'`j'] + _b[elasgasto`i']*w`j'mean), noheader
qui est restore aidsminti
}
}





________________________________________
Från: owner-statalist@hsphsun2.harvard.edu [owner-statalist@hsphsun2.harvard.edu] f&#246;r Jorge Eduardo Pérez Pérez [perez.jorge@ur.edu.co]
Skickat: den 4 november 2011 05:18
Till: statalist@hsphsun2.harvard.edu
Ämne: Re: st: problems with nlsur aids

I took a look and noticed some problems:

1. You need to post the missing coefficients. The loops that calculate
the elasticities are looking for coefficients a13, b13, g131 ...,
which are not calculated in the regression directly. To do that, this
should get you going. Run this code after the regression:

* Post the missing coefficients
forv i=1(1)13 {
        forv j=1(1)13 {
                glo l`i'`j' = cond(`i'<=`j',`i'`j',`j'`i')
        }
}
forv i=1(1)12 {
        glo com "${com} (a`i': _b[/a`i']) (b`i': _b[/b`i'])"
        forv j=1(1)12 {
                glo com "${com} (g`i'`j': _b[/g${l`i'`j'}])"
        }
}
forv i=1(1)12 {
        glo com "${com} (g`i'13: -_b[/g${l`i'1}] -_b[/g${l`i'2}] -
_b[/g${l`i'3}] - _b[/g${l`i'4}] - _b[/g${l`i'5}] - _b[/g${l`i'6}] -
_b[/g${l`i'7}] - _b[/g${l`i'8}] - _b[/g${l`i'9}] - _b[/g${l`i'10}] -
_b[/g${l`i'11}] - _b[/g${l`i'12}] )"
}

nlcom ${com} (a13:1-_b[/a1]-_b[/a2]-_b[/a3]-_b[/a4]-_b[/a5]-_b[/a6]-_b[/a7]-_b[/a8]-_b[/a9]-_b[/a10]-_b[/a11]-_b[/a12]
) (b13:-_b[/b1]-_b[/b2]-_b[/b3]-_b[/b4]-_b[/b5]-_b[/b6]-_b[/b7]-_b[/b8]-_b[/b9]-_b[/b10]-_b[/b11]-_b[/b12])
///
(g131:-_b[/g${l11}] - _b[/g${l21}] -_b[/g${l31}] -_b[/g${l41}] -
_b[/g${l51}] - _b[/g${l61} - _b[/g${l71} - _b[/g${l81} - _b[/g${l91} -
_b[/g${l101} - _b[/g${l111} - _b[/g${l121} ] ) ///
(g132:-_b[/g${l12}] - _b[/g${l22}] -

..... FILL THIS PART

(g1313:-_b[/g${l113}] - _b[/g${l213}] , noheader post


2. Your calls to coefficients are wrong. If after the regression you
type -matrix list e(b)- you will notice that the coefficients are
named /a1, /a2, etc. So your calls to coefficients should read
_b[/a1], _b[/a2], etc ... However, the previous code for posting the
missing coefficients is also changing the names from /a1 to a1 ...
etc, so you don't need to change that in the elasticities code if you
run the posting code first.

3. You still have not completely changed the QAIDS for AIDS formulas

glo mu`i'`j' "_b[g`i'`j'] - ${mu`i'}*(_b[a`j']
${gsum2`j'})-_b[l`i']*_b[b`j']/${bp}*(lnexpmean - (${ap}))^2"

The quadratic part at the end should not be there.

Hope this helps.

_______________________
Jorge Eduardo Pérez Pérez




2011/10/31 Mintewab Bezabih <Mintewab.Bezabih@economics.gu.se>:
> Dear statalisters,
>
> I posted a problem I had with an nlsur aids command a while ago. I had gotten tremendous help from Jorge and nick which helped me run the estimation correctly. But I have been stuck with computing the corresponding elastities for a while now. As my programming skills are not that great, I was not able to quite get to the problem so I thought of posting the problem again.
> I remain grateful for any help I may get.
> Thanks in advance
> mintewab
>
> **** here is the code*****
>
> capture program drop nlsuraids
>
> quietly: program define nlsuraids
>
> version 10
>
> syntax varlist(min=26 max=26) if, at(name)
>
> tokenize `varlist'
>
> args w1 w2 w3 w4 w5 w6 w7 w8 w9 w10 w11 w12 lnp1 lnp2 lnp3 lnp4 lnp5 lnp6 lnp7 lnp8 lnp9 ///
>
> lnp10 lnp11 lnp12 lnp13 lnexp
>
>
>
> // With 18 goods, there are 204 parameters that can be
>
> // estimated, after eliminating one of the goods and
>
> // imposing adding up, symmetry, and homogeneity
>
> // constraints, in the QUAIDS model
>
> // Here, we extract those parameters from the `at'
>
> // vector, and impose constraints as we go along
>
>
>
> tempname a1 a2 a3 a4 a5 a6 a7 a8 a9 a10 a11 a12 a13
>
> scalar `a1' = `at'[1,1]
>
> scalar `a2' = `at'[1,2]
>
> scalar `a3' = `at'[1,3]
>
> scalar `a4' = `at'[1,4]
>
> scalar `a5' = `at'[1,5]
>
> scalar `a6' = `at'[1,6]
>
> scalar `a7' = `at'[1,7]
>
> scalar `a8' = `at'[1,8]
>
> scalar `a9' = `at'[1,9]
>
> scalar `a10' = `at'[1,10]
>
> scalar `a11' = `at'[1,11]
>
> scalar `a12' = `at'[1,12]
>
> scalar `a13' = 1 - `a1' - `a2' - `a3' - `a4' - `a5' - `a6' - `a7' - `a8' - `a9' - `a10' - `a11' - `a12'
>
>
>
>
>
> tempname b1 b2 b3 b4 b5 b6 b7 b8 b9 b10 b11 b12 b13
>
> scalar `b1' = `at'[1,13]
>
> scalar `b2' = `at'[1,14]
>
> scalar `b3' = `at'[1,15]
>
> scalar `b4' = `at'[1,16]
>
> scalar `b5' = `at'[1,17]
>
> scalar `b6' = `at'[1,18]
>
> scalar `b7' = `at'[1,19]
>
> scalar `b8' = `at'[1,20]
>
> scalar `b9' = `at'[1,21]
>
> scalar `b10' = `at'[1,22]
>
> scalar `b11' = `at'[1,23]
>
> scalar `b12' = `at'[1,24]
>
> scalar `b13' = - `b1' - `b2' - `b3' - `b4' - `b5' - `b6' - `b7' - `b8' - `b9' - `b10' - `b11' - `b12'
>
>
>
> tempname g11 g12 g13 g14 g15 g16 g17 g18 g19 g110 g111 g112 g113
>
> tempname g21 g22 g23 g24 g25 g26 g27 g28 g29 g210 g211 g212 g213
>
> tempname g31 g32 g33 g34 g35 g36 g37 g38 g39 g310 g311 g312 g313
>
> tempname g41 g42 g43 g44 g45 g46 g47 g48 g49 g410 g411 g412 g413
>
> tempname g51 g52 g53 g54 g55 g56 g57 g58 g59 g510 g511 g512 g513
>
> tempname g61 g62 g63 g64 g65 g66 g67 g68 g69 g610 g611 g612 g613
>
> tempname g71 g72 g73 g74 g75 g76 g77 g78 g79 g710 g711 g712 g713
>
> tempname g81 g82 g83 g84 g85 g86 g87 g88 g89 g810 g811 g812 g813
>
> tempname g91 g92 g93 g94 g95 g96 g97 g98 g99 g910 g911 g912 g913
>
> tempname g101 g102 g103 g104 g105 g106 g107 g108 g109 g1010 g1011 g1012 g1013
>
> tempname g111 g112 g113 g114 g115 g116 g117 g118 g119 g1110 g1111 g1112 g1113
>
> tempname g121 g122 g123 g124 g125 g126 g127 g128 g129 g1210 g1211 g1212 g1213
>
> tempname g131 g132 g133 g134 g135 g136 g137 g138 g139 g1310 g1311 g1312 g1313
>
> tempname g141 g142 g143 g144 g145 g146 g147 g148 g149 g1410 g1411 g1412 g1413
>
> tempname g151 g152 g153 g154 g155 g156 g157 g158 g159 g1510 g1511 g1512 g1513
>
> tempname g161 g162 g163 g164 g165 g166 g167 g168 g169 g1610 g1611 g1612 g1613
>
> tempname g171 g172 g173 g174 g175 g176 g177 g178 g179 g1710 g1711 g1712 g1713
>
> tempname g181 g182 g183 g184 g185 g186 g187 g188 g189 g1810 g1811 g1812 g1813
>
>
>
> scalar `g11' = `at'[1,25]
>
> scalar `g12' = `at'[1,26]
>
> scalar `g13' = `at'[1,27]
>
> scalar `g14' = `at'[1,28]
>
> scalar `g15' = `at'[1,29]
>
> scalar `g16' = `at'[1,30]
>
> scalar `g17' = `at'[1,31]
>
> scalar `g18' = `at'[1,32]
>
> scalar `g19' = `at'[1,33]
>
> scalar `g110' = `at'[1,34]
>
> scalar `g111' = `at'[1,35]
>
> scalar `g112' = `at'[1,36]
>
> scalar `g113' = -`g11' - `g12' - `g13'- `g14'- `g15'- `g16'- `g17'- `g18'- `g19'- `g110'- `g111'- `g112'
>
> scalar `g21' = `g12'
>
> scalar `g22' = `at'[1,37]
>
> scalar `g23' = `at'[1,38]
>
> scalar `g24' = `at'[1,39]
>
> scalar `g25' = `at'[1,40]
>
> scalar `g26' = `at'[1,41]
>
> scalar `g27' = `at'[1,42]
>
> scalar `g28' = `at'[1,43]
>
> scalar `g29' = `at'[1,44]
>
> scalar `g210' = `at'[1,45]
>
> scalar `g211' = `at'[1,46]
>
> scalar `g212' = `at'[1,47]
>
> scalar `g213' = -`g21' - `g22' - `g23'- `g24'- `g25'- `g26'- `g27'- `g28'- `g29'- `g210'- `g211'- `g212'
>
>
>
> scalar `g31' = `g13'
>
> scalar `g32' = `g23'
>
> scalar `g33' = `at'[1,48]
>
> scalar `g34' = `at'[1,49]
>
> scalar `g35' = `at'[1,50]
>
> scalar `g36' = `at'[1,51]
>
> scalar `g37' = `at'[1,52]
>
> scalar `g38' = `at'[1,53]
>
> scalar `g39' = `at'[1,54]
>
> scalar `g310' = `at'[1,55]
>
> scalar `g311' = `at'[1,56]
>
> scalar `g312' = `at'[1,57]
>
> scalar `g313' = -`g31' - `g32' - `g33'- `g34'- `g35'- `g36'- `g37'- `g38'- `g39'- `g310'- `g311'- `g312'
>
> scalar `g41' = `g14'
>
> scalar `g42' = `g24'
>
> scalar `g43' = `g34'
>
> scalar `g44' = `at'[1,58]
>
> scalar `g45' = `at'[1,59]
>
> scalar `g46' = `at'[1,60]
>
> scalar `g47' = `at'[1,61]
>
> scalar `g48' = `at'[1,62]
>
> scalar `g49' = `at'[1,63]
>
> scalar `g410' = `at'[1,64]
>
> scalar `g411' = `at'[1,65]
>
> scalar `g412' = `at'[1,66]
>
> scalar `g413' = -`g41' - `g42' - `g43'- `g44'- `g45'- `g46'- `g47'- `g48'- `g49'- `g410'- `g411'- `g412'
>
> scalar `g51' = `g15'
>
> scalar `g52' = `g25'
>
> scalar `g53' = `g35'
>
> scalar `g54' = `g45'
>
> scalar `g55' = `at'[1,67]
>
> scalar `g56' = `at'[1,68]
>
> scalar `g57' = `at'[1,69]
>
> scalar `g58' = `at'[1,70]
>
> scalar `g59' = `at'[1,71]
>
> scalar `g510' = `at'[1,72]
>
> scalar `g511' = `at'[1,73]
>
> scalar `g512' = `at'[1,74]
>
> scalar `g513' = -`g51' - `g52' - `g53'- `g54'- `g55'- `g56'- `g57'- `g58'- `g59'- `g510'- `g511'- `g512'
>
> scalar `g61' = `g16'
>
> scalar `g62' = `g26'
>
> scalar `g63' = `g36'
>
> scalar `g64' = `g46'
>
> scalar `g65' = `g56'
>
> scalar `g66' = `at'[1,75]
>
> scalar `g67' = `at'[1,76]
>
> scalar `g68' = `at'[1,77]
>
> scalar `g69' = `at'[1,78]
>
> scalar `g610' = `at'[1,79]
>
> scalar `g611' = `at'[1,80]
>
> scalar `g612' = `at'[1,81]
>
> scalar `g613' = -`g61' - `g62' - `g63'- `g64'- `g65'- `g66'- `g67'- `g68'- `g69'- `g610'- `g611'- `g612'
>
> scalar `g71' = `g17'
>
> scalar `g72' = `g27'
>
> scalar `g73' = `g37'
>
> scalar `g74' = `g47'
>
> scalar `g75' = `g57'
>
> scalar `g76' = `g67'
>
> scalar `g77' = `at'[1,82]
>
> scalar `g78' = `at'[1,83]
>
> scalar `g79' = `at'[1,84]
>
> scalar `g710' = `at'[1,85]
>
> scalar `g711' = `at'[1,86]
>
> scalar `g712' = `at'[1,87]
>
> scalar `g713' = -`g71' - `g72' - `g73'- `g74'- `g75'- `g76'- `g77'- `g78'- `g79'- `g710'- `g711'- `g712'
>
> scalar `g81' = `g18'
>
> scalar `g82' = `g28'
>
> scalar `g83' = `g38'
>
> scalar `g84' = `g48'
>
> scalar `g85' = `g58'
>
> scalar `g86' = `g68'
>
> scalar `g87' = `g78'
>
> scalar `g88' = `at'[1,88]
>
> scalar `g89' = `at'[1,89]
>
> scalar `g810' = `at'[1,90]
>
> scalar `g811' = `at'[1,91]
>
> scalar `g812' = `at'[1,92]
>
> scalar `g813' = -`g81' - `g82' - `g83'- `g84'- `g85'- `g86'- `g87'- `g88'- `g89'- `g810'- `g811'- `g812'
>
> scalar `g91' = `g19'
>
> scalar `g92' = `g29'
>
> scalar `g93' = `g39'
>
> scalar `g94' = `g49'
>
> scalar `g95' = `g59'
>
> scalar `g96' = `g69'
>
> scalar `g97' = `g79'
>
> scalar `g98' = `g89'
>
> scalar `g99' = `at'[1,93]
>
> scalar `g910' = `at'[1,94]
>
> scalar `g911' = `at'[1,95]
>
> scalar `g912' = `at'[1,96]
>
> scalar `g913' = -`g91' - `g92' - `g93'- `g94'- `g95'- `g96'- `g97'- `g98'- `g99'- `g910'- `g911'- `g912'
>
>
>
> scalar `g101' = `g110'
>
> scalar `g102' = `g210'
>
> scalar `g103' = `g310'
>
> scalar `g104' = `g410'
>
> scalar `g105' = `g510'
>
> scalar `g106' = `g610'
>
> scalar `g107' = `g710'
>
> scalar `g108' = `g810'
>
> scalar `g109' = `g910'
>
> scalar `g1010' = `at'[1,97]
>
> scalar `g1011' = `at'[1,98]
>
> scalar `g1012' = `at'[1,99]
>
> scalar `g1013' = -`g101' - `g102' - `g103'- `g104'- `g105'- `g106'- `g107'- `g108'- `g109'- `g1010'- `g1011'- `g1012'
>
>
>
>
>
> scalar `g111' = `g111'
>
> scalar `g112' = `g211'
>
> scalar `g113' = `g311'
>
> scalar `g114' = `g411'
>
> scalar `g115' = `g511'
>
> scalar `g116' = `g611'
>
> scalar `g117' = `g711'
>
> scalar `g118' = `g811'
>
> scalar `g119' = `g911'
>
> scalar `g1110' = `g1011'
>
> scalar `g1111' = `at'[1,100]
>
> scalar `g1112' = `at'[1,101]
>
> scalar `g1113' = -`g111' - `g112' - `g113'- `g114'- `g115'- `g116'- `g117'- `g118'- `g119'- `g1110'- `g1111'- `g1112'
>
> scalar `g121' = `g112'
>
> scalar `g122' = `g212'
>
> scalar `g123' = `g312'
>
> scalar `g124' = `g412'
>
> scalar `g125' = `g512'
>
> scalar `g126' = `g612'
>
> scalar `g127' = `g712'
>
> scalar `g128' = `g812'
>
> scalar `g129' = `g912'
>
> scalar `g1210' = `g1012'
>
> scalar `g1211' = `g1112'
>
> scalar `g1212' = `at'[1,102]
>
> scalar `g1213' = -`g121' - `g122' - `g123'- `g124'- `g125'- `g126'- `g127'- `g128'- `g129'- `g1210'- `g1211'- `g1212'
>
> scalar `g131' = `g113'
>
> scalar `g132' = `g213'
>
> scalar `g133' = `g313'
>
> scalar `g134' = `g413'
>
> scalar `g135' = `g513'
>
> scalar `g136' = `g613'
>
> scalar `g137' = `g713'
>
> scalar `g138' = `g813'
>
> scalar `g139' = `g913'
>
> scalar `g1310' = `g1013'
>
> scalar `g1311' = `g1113'
>
> scalar `g1312' = `g1213'
>
> scalar `g1313' = -`g131' - `g132' - `g133'- `g134'- `g135'- `g136'- `g137'- `g138'- `g139'- `g1310'- `g1311'- `g1312'
>
>
>
> // Okay, now that we have all the parameters, we can
>
> // calculate the expenditure shares.
>
> quietly {
>
> // First get the price index
>
> // I set a_0 = 5
>
> tempvar lnpindex
>
> gen double `lnpindex' = 5 + `a1'*`lnp1' + `a2'*`lnp2'+ `a3'*`lnp3' + `a4'*`lnp4'+ `a5'*`lnp5'+ `a6'*`lnp6' ///
>
> + `a7'*`lnp7'+ `a8'*`lnp8'+ `a9'*`lnp9'+ `a10'*`lnp10'+ `a11'*`lnp11'+ `a12'*`lnp12'+ `a13'*`lnp13'
>
>
>
>
>
> forvalues i = 1/13 {
>
> forvalues j = 1/13 {
>
> replace `lnpindex' = `lnpindex' + ///
>
> 0.5*`g`i'`j''*`lnp`i''*`lnp`j''
>
> }
>
> }
>
> // Finally, the expenditure shares for 17 of the 18
>
> // nutrients (the equation 18 is dropped to avoid singularity)
>
> replace `w1' = `a1' + `g11'*`lnp1' + `g12'*`lnp2' +`g13'*`lnp3' + `g14'*`lnp4' + `g15'*`lnp5' ///
>
> + `g16'*`lnp6' + `g17'*`lnp7' + `g18'*`lnp8' + `g19'*`lnp9' + `g110'*`lnp10' + `g111'*`lnp11' ///
>
> + `g112'*`lnp12' + `g113'*`lnp13'+ `b1'*(`lnexp' - `lnpindex')
>
> replace `w2' = `a2' + `g21'*`lnp1' + `g22'*`lnp2' +`g23'*`lnp3' + `g24'*`lnp4' + `g25'*`lnp5' ///
>
> + `g26'*`lnp6' + `g27'*`lnp7' + `g28'*`lnp8' + `g29'*`lnp9' + `g210'*`lnp10' + `g211'*`lnp11' ///
>
> + `g212'*`lnp12' + `g213'*`lnp13' + `b2'*(`lnexp' - `lnpindex')
>
>
>
> replace `w3' = `a3' + `g31'*`lnp1' + `g32'*`lnp2' +`g33'*`lnp3' + `g34'*`lnp4' + `g35'*`lnp5' ///
>
> + `g36'*`lnp6' + `g37'*`lnp7' + `g38'*`lnp8' + `g39'*`lnp9' + `g310'*`lnp10' + `g311'*`lnp11' ///
>
> + `g312'*`lnp12' + `g313'*`lnp13' + `b3'*(`lnexp' - `lnpindex')
>
> replace `w4' = `a4' + `g41'*`lnp1' + `g42'*`lnp2' +`g43'*`lnp3' + `g44'*`lnp4' + `g45'*`lnp5' ///
>
> + `g46'*`lnp6' + `g47'*`lnp7' + `g48'*`lnp8' + `g49'*`lnp9' + `g410'*`lnp10' + `g411'*`lnp11' ///
>
> + `g412'*`lnp12' + `g413'*`lnp13' + `b4'*(`lnexp' - `lnpindex')
>
> replace `w5' = `a5' + `g51'*`lnp1' + `g52'*`lnp2' +`g53'*`lnp3' + `g54'*`lnp4' + `g55'*`lnp5' ///
>
> + `g56'*`lnp6' + `g57'*`lnp7' + `g58'*`lnp8' + `g59'*`lnp9' + `g510'*`lnp10' + `g511'*`lnp11' ///
>
> + `g512'*`lnp12' + `g513'*`lnp13' + `b5'*(`lnexp' - `lnpindex')
>
> replace `w6' = `a6' + `g61'*`lnp1' + `g62'*`lnp2' +`g63'*`lnp3' + `g64'*`lnp4' + `g65'*`lnp5' ///
>
> + `g66'*`lnp6' + `g67'*`lnp7' + `g68'*`lnp8' + `g69'*`lnp9' + `g610'*`lnp10' + `g611'*`lnp11' ///
>
> + `g612'*`lnp12' + `g613'*`lnp13' + `b6'*(`lnexp' - `lnpindex')
>
>
>
> replace `w7' = `a7' + `g71'*`lnp1' + `g72'*`lnp2' +`g73'*`lnp3' + `g74'*`lnp4' + `g75'*`lnp5' ///
>
> + `g76'*`lnp6' + `g77'*`lnp7' + `g78'*`lnp8' + `g79'*`lnp9' + `g710'*`lnp10' + `g711'*`lnp11' ///
>
> + `g712'*`lnp12' + `g713'*`lnp13' + `b7'*(`lnexp' - `lnpindex')
>
> replace `w8' = `a8' + `g81'*`lnp1' + `g82'*`lnp2' +`g83'*`lnp3' + `g84'*`lnp4' + `g85'*`lnp5' ///
>
> + `g86'*`lnp6' + `g87'*`lnp7' + `g88'*`lnp8' + `g89'*`lnp9' + `g810'*`lnp10' + `g811'*`lnp11' ///
>
> + `g812'*`lnp12' + `g813'*`lnp13' + `b8'*(`lnexp' - `lnpindex')
>
> replace `w9' = `a9' + `g91'*`lnp1' + `g92'*`lnp2' +`g93'*`lnp3' + `g94'*`lnp4' + `g95'*`lnp5' ///
>
> + `g96'*`lnp6' + `g97'*`lnp7' + `g98'*`lnp8' + `g99'*`lnp9' + `g910'*`lnp10' + `g911'*`lnp11' ///
>
> + `g912'*`lnp12' + `g913'*`lnp13' + `b9'*(`lnexp' - `lnpindex')
>
>
>
> replace `w10' = `a10' + `g101'*`lnp1' + `g102'*`lnp2' +`g103'*`lnp3' + `g104'*`lnp4' + `g105'*`lnp5' ///
>
> + `g106'*`lnp6' + `g107'*`lnp7' + `g108'*`lnp8' + `g109'*`lnp9' + `g1010'*`lnp10' + `g1011'*`lnp11' ///
>
> + `g1012'*`lnp12' + `g1013'*`lnp13' + `b10'*(`lnexp' - `lnpindex')
>
> replace `w11' = `a11' + `g111'*`lnp1' + `g112'*`lnp2' +`g113'*`lnp3' + `g114'*`lnp4' + `g115'*`lnp5' ///
>
> + `g116'*`lnp6' + `g117'*`lnp7' + `g118'*`lnp8' + `g119'*`lnp9' + `g1110'*`lnp10' + `g1111'*`lnp11' ///
>
> + `g1112'*`lnp12' + `g1113'*`lnp13' + `b11'*(`lnexp' - `lnpindex')
>
> replace `w12' = `a12' + `g121'*`lnp1' + `g122'*`lnp2' +`g123'*`lnp3' + `g124'*`lnp4' + `g125'*`lnp5' ///
>
> + `g126'*`lnp6' + `g127'*`lnp7' + `g128'*`lnp8' + `g129'*`lnp9' + `g1210'*`lnp10' + `g1211'*`lnp11' ///
>
> + `g1212'*`lnp12' + `g1213'*`lnp13' + `b12'*(`lnexp' - `lnpindex')
>
> }
>
> end
>
> nlsur aids @ w1 w2 w3 w4 w5 w6 w7 w8 w9 w10 w11 w12 lnp1 lnp2 lnp3 lnp4 lnp5 lnp6 lnp7 lnp8 lnp9 ///
>
> lnp10 lnp11 lnp12 lnp13 lnexp , ifgnls nequations(12) param(a1 a2 a3 a4 ///
>
> a5 a6 a7 a8 a9 a10 a11 a12 b1 b2 b3 b4 b5 b6 b7 b8 b9 b10 b11 b12 g11 g12 g13 g14 g15 ///
>
> g16 g17 g18 g19 g110 g111 g112 g22 g23 g24 g25 g26 g27 g28 g29 g210 g211 g212 ///
>
> g33 g34 g35 g36 g37 g38 g39 g310 g311 g312 g44 g45 g46 g47 g48 g49 g410 g411 g412 ///
>
> g55 g56 g57 g58 g59 g510 g511 g512 g66 g67 g68 g69 g610 g611 g612 g77 g78 ///
>
> g79 g710 g711 g712 g88 g89 g810 g811 g812 g99 g910 g911 g912 ///
>
> g917 g1010 g1011 g1012 g1111 g1112 g1212)
>
> *************************************************************************
>
> **********************THE ELASTICITY PART**************************************
>
> ******************************************************************************
>
> set trace on
>
> set tracedepth 4
>
> est store aidsminti
>
> quietly {
>
> foreach x of varlist w* lnp* lnexp {
>
> sum `x'
>
> scalar `x'mean=r(mean)
>
> }
>
> * Price indexes
>
> glo asum "_b[a1]*lnp1mean"
>
> forv i=2(1)13 {
>
> glo asum "${asum} + _b[a`i']*lnp`i'mean"
>
> }
>
> glo gsum ""
>
> forv i=1(1)13 {
>
> forv j=1(1)13 {
>
> glo gsum "${gsum} + 0.5*_b[g`i'`j']*lnp`i'mean*lnp`j'mean"
>
> }
>
> }
>
> *glo ap "4.7 + ${asum} ${gsum}"
>
> *glo bp "_b[b1]*lnp1mean"
>
> *forv i=2(1)13 {
>
> *glo bp "${bp} + _b[b`i']*lnp`i'mean"
>
> *}
>
> *glo bp "(exp(${bp}))"
>
> * Mus
>
> forv i=1(1)13 {
>
> glo mu`i' "_b[b`i'] "
>
> }
>
> forv j=1(1)13 {
>
> glo gsum2`j' ""
>
> forv k=1(1)13 {
>
> glo gsum2`j' "${gsum2`j'} + _b[g`j'`k']*lnp`k'mean"
>
> }
>
> }
>
> }
>
> forv i=1(1)13 {
>
> forv j=1(1)13 {
>
> glo delta=cond(`i'==`j',1,0)
>
> glo mu`i'`j' "_b[g`i'`j'] - ${mu`i'}*(_b[a`j'] ${gsum2`j'})-_b[l`i']*_b[b`j']/${bp}*(lnexpmean - (${ap}))^2"
>
> * If expression is too long, split it
>
> cap nlcom (elasgasto`i': ${mu`i'}/w`i'mean + 1)(mu`i'`j':${mu`i'`j'}), post noheader
>
> if _rc {
>
> qui nlcom (elasgasto`i': ${mu`i'}/w`i'mean + 1) (mu`i'`j'f:(1e+2)*(${mu`i'`j'})), post noheader
>
> qui nlcom (elasgasto`i': _b[elasgasto`i']) (mu`i'`j':_b[mu`i'`j'f]/(1e+2)), post noheader
>
> }
>
> }
>
> }
>
> * Uncompensated price elasticity
>
> nlcom (elasgasto`i': _b[elasgasto`i'])
>
> (elpnc`i'`j':_b[mu`i'`j']/w`i'mean - ${delta}) , post noheader
>
> * Compensated price elasticity
>
> nlcom (elpc`i'`j': _b[elpnc`i'`j'] + _b[elasgasto`i']*w`j'mean), noheader
>
> qui est restore aidsminti
>
> }
>
> }
>
> *
> *   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/
>
>
>


*
*   For searches and help try:
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*
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