BJ Data Tech Solution

Specialized on Data processing, Data management Implementation plan, Data Collection tools - electronic and paper base, Data cleaning specifications, Data extraction, Data transformation, Data load, Analytical Datasets, and Data analysis. BJ Data Tech Solutions teaches on design and developing Electronic Data Collection Tools using CSPro, and STATA commands for data manipulation. Setting up Data Management systems using modern data technologies such as Relational Databases, C#, PHP and Android.

Thursday, December 20, 2018

convergence issues with nlsur (parameters constrained to zero or tending to infinity)

Hi all,

I am running nlsur estimations and I am experiencing some difficulty in convergence. Out of 26 parameters to be estimated, 1 is constrained by Stata to zero (ra0) and another one (ck0) tends to infinity (no standard error is estimated). I am joining the estimation output ( nlsur.pdf ). Have some of you an idea of what could be the reason behind these problems?

Thanks in advance,
Luca

BJ Data Tech Solution

Thursday, December 20, 2018

convergence issues with nlsur (parameters constrained to zero or tending to infinity)

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