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We would be grateful for **any suggestions that** help us to understand the reasons for these problems and how to best address them. In order to do so, we have transformed our dataset into a matrix showing what percentage of each courts' citations points to a particular other court. As Brian Joiner said, "Regression without plots is truly a regression". > > Leaf > > > > Hi all, > > > > I found r-site-research not work for me But, that is not the problem. http://interopix.com/stata-error/stata-error-r-601.php

Buis Institut fuer Soziologie Universitaet Tuebingen Wilhelmstrasse 36 72074 Tuebingen Germany http://home.fsw.vu.nl/m.buis/ ----------------------------------------- ------------------------------- Valérie OROZCO Toulouse School of Economics (INRA-GREMAQ) 21, allée de Brienne F-31000 Toulouse, France MF 426 +33 Is there any way in which I can define the number of iterations in stata? The comment about perfect colinearity was just one possible thing that could cause your problems with -nlsur-. -- Maarten ----------------------------------------- Maarten L. I have understood your situation to be the following: You estimate a model with -nlsur-, "but for some standard errors that are missing for unknown reason." After that, you ignore this http://www.stata.com/statalist/archive/2009-03/msg01244.html

As the examples below show, slightly modifying the nonlinear expression of the marginal effect (changing the exponent of _b[/Umi]), and using exactly the same parameters as before, produces sensible results. . For more information on Statalist, see the FAQ. I set number in nls.control which is supposed to control the number of iterations but it didn't work well. You can also try -fmlogit-. (if you care about the technical details: -fmlogit- is implemented as -d2-, that is with analytical first and second derivatives, which means that it is quicker,

There are many possible reasons this can happen, but the most common is when the derivative is near zero, but not exactly equal to zero. Once that's working, you can still try dirifit, at which point you might conclude that it doesn't make a meaningful contribution and will only confuse the reviewers. z P>|z| [95% Conf. Since I use remote data access, **I would like to define** the maximal number of iterations until the program switches to the next probit model.

Even if I modify my > equations in different manner I get the same kind of problem. Find out the encripted number or letter Why is the background bigger and blurrier in one of these images? Thanks to the Stata Technical Support, we understood that, in my case,like Maarten suggests you, it was a problem of small value of an estimated parameter (not far from 0), leading http://www.stata.com/statalist/archive/2009-03/msg01114.html Why is international first class much more expensive than international economy class?

Nick [email protected] [email protected] I have a problem making nonlinear combinations of parameters using the command nlcom after estimating a non-linear system of equations. So my comment was that you should first fix your -nlsur- command before you start using -nlcom-, and the problem with your -nlsur- command is probably the reason that -nlcom- won't If there is a problem in your previous command then there will also be a problem in your -nlcom- command. Do you have any suggestion? * * 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/ Maarten buis Reply | Threaded Open this post in threaded view

If convergence is still not achieved, then Jitian can email me privately and I'd be happy to take a closer look. --Bobby [email protected] * * For searches and help try: * So, I'd expect it to perform poorly where there is collaboration or competition between shares, which seems likely here. nlcom ME1 : _b[/Uci]^2 + _b[/Uxi]^2 + _b[/Umi] + _b[/Uii]^2 , ME1: _b[/Uci]^2 + _b[/Uxi]^2 + _b[/Umi] + _b[/Uii]^2 ------------------------------------------------------------------------------ | X Collapse Posts Latest Activity Search Page of 1 Filter Time All Time Today Last Week Last Month Show All Discussions only Photos only Videos only Links only Polls only Filtered

For instance I need the following . this page Stainless Steel Fasteners How does Fate handle wildly out-of-scope attempts to declare story details? Use a stepsize that is too large, and your derivative is not very accurate. But most experience with this kind of procedure is that if 100 is not enough, throwing more cycles at it very rarely improves matters.

Err. It is true that most probably there is some collinearity issue in the equations I am estimating (these are the output and input demand functions of a Symmetric Normalised Quadratic Profit Join them; it only takes a minute: Sign up Error: “Maximum number of iterations exceeded” using nlcom in Stata up vote 4 down vote favorite I am trying to estimate the get redirected here DDoS: Why not block originating IP addresses?

Sometimes, when we do get a result with dirifit, ddirifit will result in an error message saying "maximum number of iterations exceeded" (I typically set the maximum number up to 10000). So my comment was that you should first fix your -nlsur- command before you start using -nlcom-, and the problem with your -nlsur- command is probably the reason that -nlcom- won't I check the manual, it says that the maximum iteration number of > using nlcom and testnl is set to be 100.

The error message is saying that "maximum number of iteration > exceeds". Is this 'fact' about elemental sulfur correct? Std. Interval] -------------+---------------------------------------------------------------- ME3 | .4098511 .0654577 6.26 0.000 .2815562 .5381459 ------------------------------------------------------------------------------ So the problem must be in nlcom and

nlcom ME1 : _b[/Uci]^2 + _b[/Uxi]^2 + _b[/Umi] + _b[/Uii]^2 , ME1: _b[/Uci]^2 + _b[/Uxi]^2 + _b[/Umi] + _b[/Uii]^2 ------------------------------------------------------------------------------ | Coef. Then I put nls.control(maxiter = 50, tol = 1e-05, minFactor = 1/1024) in nls(.. ), and modified the argument of maxiter = 500. I will take that into consideration. –Metrics Dec 10 '13 at 22:54 add a comment| Your Answer draft saved draft discarded Sign up or log in Sign up using Google http://interopix.com/stata-error/stata-error-r-682.php For your example, it will be something like that : nlcom (ME0first : (1e+2)*( _b[/Uci]^2 + _b[/Uxi]^2 + _b[/Umi]^2 + _b[/Uii]^2)), post nlcom ME0: _b[ME0first]/(1e+2) Hope this helps you… Valérie -------------------------------

Interval] -------------+---------------------------------------------------------------- _nl_1 | .9223902 .0129743 71.09 0.000 .8969611 .9478193 ------------------------------------------------------------------------------ _nl_1: binormal(1.733373263151318-(.0438395852394023*[Tier1]_b[race])+(0*[Tier1]_b[race]),7.575546508411257-(.0438395852394023*[Tier2]_b[race])+ > (0*[Tier2]_b[race])/exp([lnsigma]_b[_cons]),tanh([tau]_b[_cons]))*(1e+2) Maximum number of iterations exceeded. Nick [hidden email] [hidden email] I have a problem making nonlinear combinations of parameters using the command nlcom after estimating a non-linear system of equations. The reason is that linear models don't do well near boundaries. Use a stepsize that is too small, and you run into numerical difficulty since you would be dividing by a number that is virtually zero.

r(498); If I slightly modify the marginal effects changing the exponent of _b[/Umi] I get the following . Mitchell Data Management Using Stata - http://www.stata.com/bookstore/dmus.htmlA Visual Guide to Stata Graphics - http://www.stata.com/bookstore/vgsg.htmlStata tidbit of the week - http://www.MichaelNormanMitchell.comOn 2010-11-18 10.54 PM, [hidden email]

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