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Changes to what? Nick [email protected] Michael McCulloch > Jennifer response brings to mind a question that recently > occurred to me: > Is there a Stata-compatible text edi… Read More

how can i use stata to estimate simultaneous equations with qualitative variables as follows: y1=a1+b1y2+c1x1+e1 y2=a2+b2y1+c2x2+e2 y1*=1 if y1>0 y1*=0 if y1<=0 y2*=1 if y2>0 y2*=0… Read More

It's a good question. I guess: -scatter- calls -graph- calls ... something that clears your r-class results. -graph- needs all sorts of little calculations to work out what to show… Read More

Hello all,I have searched the web and available Stata faqs and helpfiles for an answer to an sureg question and am unable to find one on my own. Much obliged if anyone can help me through th… Read More

Hello all,I have searched the web and available Stata faqs and helpfiles for an answer to an sureg question and am unable to find one on my own. Much obliged if anyone can help me through th… Read More

Sorry if this is a silly question. I did the following sequence of commands. I closed the scatter as soon as it opened. No other commands. Why does r(mean) go away after you use it in th… Read More

No. You should try ` : di %9.1f `r(mean)'' See help extended_fcn. Tip: I would go `: di %2.1f `r(mean)'' even if you are sure that format is too restrictive. You're likely to be wrong, as… Read More

Whoops, of course you're right. When I play with things to work out code I usually don't keep the changes, so I mangle working datasets willy-nilly and didn't think to change the conditioned… Read More

I am trying to include the content of a macro within a graph, but I'm having problems with the display format. For example:sysuse auto, clear qui: summ length twoway scatter length mpg, tex… Read More

Whoa! The question was just about _listing_. You just changed Raoul's dataset by throwing much of it away. duplicates tag dateofbirth, gen(tag) sort dateofbirth list id dateofbirth if tag… Read More

there may be a more elegant way to do this, albeit this is but one attempt: * obtain the number of duplicates w/in date of birth bysort date_of_birth: gen dob_duplicate = _N * tag ea… Read More

Maybe try something along these lines:duplicates tag dateofbirth, gen(tag) drop if tag==0 sort dateofbirth by dateofbirth: list idJen Marino-----Original Message----- From: owner-statalist@h… Read More

Hi, I have a large database and would like to list the idnumber of all subjects with the same date of birth. How do I do this? I have tried .duplicate, but can figure out how to do it. Tha… Read More

In the unlikely event that you have not, do check out -findit monte carlo-. The example in STB reprints Vol 4, pg 207 may be helpfulTITLE STB-20 ssi6. Simplified Monte Carlo simulat… Read More

Dear all,Does anyone have or know of a Stata program to compute the various Chou-Talalay statistics of dose-effect relationship?Thank you, Ricardo Ricardo Ovaldia, MS Statistician Oklahom… Read More

Stata Users:I am still learning my way around Stata after many years of using SAS. In SAS it is fairly easy to write a program to do a simple Monte Carlo study to illustrate the properties… Read More

Lei Xuan wrote:> I am computing probabilities for t-test and z-test. > I want to know if the functions -tprob- and -normprob- are out-of-date > since no help files explain these fun… Read More