Amir Pooyan Afghari

3 Questions 14 Answers 0 Followers

Questions related from Amir Pooyan Afghari

Extremely small, yet significant, dispersion parameter estimate in a negative binomial regression?

Would you change the model from a Negative Binomial regression to a Poisson regression if the estimate for the dispersion parameter of the negative binomial model is extremely large, yet...

06 June 2019 6,042 10 View

How to estimate regression coefficients in a periodic likelihood function?

If a likelihood function has many local maximum points, then depending on the initial values, the Maximum Likelihood Estimation (MLE) may get stuck in the local maximum points. Now, if the...

04 April 2016 5,744 1 View

What are the properties of the scale parameter in the Multivariate Wishart Distribution?

I am trying to assign a Wishart distribution to a matrix. When I assign the scale parameter of the Wishart distribution everything but the I matrix (or its multiples), the software cannot compute...

04 April 2015 7,214 8 View