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.

constant term missing standard errors

Hi,

I am running a multivariate probit model to assess the music consumption habits of a sample of individuals (about 230 people). I have 4 equations with mainly dummy explanatory variables. When I run the multivariate model with all 4 equations using the cmp function, the output is fine. However, I removed one of my equations because it was not significant overall when run as an individual regression. When I run the model with only three equations, the standard error for the constant term in the regression for one of my dependent variables (PIRACY) is now missing.

Why might this happen? Is it a big issue?

Many thanks

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