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From | "Mason, Patrick" <pmason@fsu.edu> |
To | "statalist@hsphsun2.harvard.edu" <statalist@hsphsun2.harvard.edu> |
Subject | st: STATA won't read command |
Date | Fri, 7 Mar 2014 01:53:28 +0000 |
I use STATA/SE 13.1 for Windows (64 bit x86-64) The code appended below works fine on a small hypothetical sample. I manually enter the data, then copy the code from a Microsoft Word .doc file and past the commands directly into STATA's command window. The commands execute without a problem. I place these same commands inside a .do file. I call the do file in STATA and the commands do not work! I get the following message. quietly forvalues i = 1/`r(max)’ { invalid syntax r(198); Is there a way to save the .do so that the forvalues command will execute? thanks, plmason generate meanwage = . by region, sort: gen pid = _n summarize pid quietly forvalues i = 1/`r(max)’ { generate include = 1 if pid != `i’ egen work = mean(wage*include), by(region) replace meanwage = work if pid == `i’ drop include work } ________________________________________ From: owner-statalist@hsphsun2.harvard.edu [owner-statalist@hsphsun2.harvard.edu] on behalf of Z. Liu [zl290@cam.ac.uk] Sent: Thursday, March 06, 2014 8:45 PM To: statalist@hsphsun2.harvard.edu Subject: st: Fwd: -cmp- not concave Dear all, I've been trying to fit a bivariate tobit model using the user-written command -cmp-. The model looks like this: cmp (equation1: y1 = X1) (equation2: y2 = y1 + X2), indicators(2 2) robust This model doesn't work out. Stata keeps showing 'log pseudolikelihood = 0 (not concave)'. I tried to start with minimum regressors (1-2 explanatory variables) in each equation, but the problem remains. I also tried alternative ml options such as - tech(dfp)- and -difficult- but still can't fix it. However, the two tobit equations can be estimated separately, although the Pseudo R2 is quite small (around 5%). As well, the system model can be estimated if I change the two tobit equations into linear equations. Some descriptive statistics of the two dependent variables are as follows: y1: Percentiles: 1% (0), 25% (0), 50% (23.57), 99% (6127.14); mean (365.00); SD (1186.90); Skewness (7.14); Kurtosis (71.23) y2: Percentiles: 1% (0), 50% (0), 75% (0), 90% (78.10), 99% (1128.53); mean (61.29); SD (401.82); Skewness (13.27); Kurtosis (217.49) Anybody out there knows what might be the problem? Any advice or suggestions would be appreciated. Thanks a lot in advance. Best Regards, Leo * * For searches and help try: * http://www.stata.com/help.cgi?search * http://www.stata.com/support/faqs/resources/statalist-faq/ * http://www.ats.ucla.edu/stat/stata/ * * For searches and help try: * http://www.stata.com/help.cgi?search * http://www.stata.com/support/faqs/resources/statalist-faq/ * http://www.ats.ucla.edu/stat/stata/