I am **Muhammad Imdad Ullah**, the Author and Admin of gmstat.com. In 2017, I earned my Ph.D. degree in Statistics from Bahauddin Zakariya University Multan, Pakistan. The main concentration of my work in my Ph.D. was detection and collinearity and its remedy using some biased regression techniques such as ridge regression and Liu regression. I proposed two collinearity diagnostics in my Ph.D. work and also developed three R packages that are available on CRAN. The packages are mctest, lmridge, and liureg. I also have three publications related to these packages in The R Journal.

I am also teaching applied Statistics and Mathematics as a visiting lecturer in different departments of the University.

Following are the subjects taught by me.

- Statistical Packages (SPSS and Minitab)
- Design of experiment (Practical)
- Business Statistics (I & II)
- Business Mathematics
- Business Mathematics and Statistics
- Probability and Probability distributions (Practical)
- Advanced Statistics (Sociology, Psychology)
- Quantitative Methods Using SPSS
- Quantitative Techniques

**Publications:**

- Aslam, M., and Imdad Ullah, M. (2023). Practicing R for Statistical Computing. Springer Nature.
- Hayat, H., Akbar, A., Ahmad, T., Bhatti S.H., and Ullah, M.I. (2021). Robustness to missing observation and optimalities of response surface designs with regular and complex structure,
*Communications in Statistics-Simulation and Computation, 1-18.* **Imdad, M. U.**, Aslam, M., and Altaf, S. (2018). lmridge: A comprehensive R Package for Ridge Regression.*The R Journal*, 10(2), 326-346.**Imdadullah, M.**, Aslam, M., and Altaf, S. (2017).*liureg*: A Comprehensive R Package for the Liu Estimation of Linear Regression Model with Collinear Regressors.*The R Journal*, 9(2), 232-247.**Imdadullah, M.**, Aslam, M., and Altaf, S. (2016).*mctest*: An R Package for Detection of collinearity among regressors.*The R Journal*, 8(2), 499-509.- Qureshi, S.U., Ashfaq, J., Hassan, M.U, Imdadullah, M. (2015). Impact of Extroversion and Narcissism on in Role and Extra Role Performance: Moderating Role of Impression Management Motives, Pakistan Journal of Commerce and Social Sciences, Vol. 9, pp. 96-119.
- Qureshi M.A., Ali Abdullah and Imdadullah M. (2012). Stock Pricesâ€™ Variability around Earnings Announcement Dates at Karachi Stock Exchange, Hindawi Publishing Corporation, Economics Research International, Vol. 2012.
- Qureshi M.A., Imdadullah M. and Tanveer A. (2012). What determines leverage in Pakistan? A panel data analysis. African Journal of Business Management. Vol. 6(3), pp. 978-985.
- Qureshi M.A., Waqas A. and Imdadullah M. (2012). Does Diversification Affect Capital Structure and Profitability in Pakistan? Asian Social Journal, Vol. 8, No. 4.
- Numan A., Ali M., Imran S.C. and Imdadullah M. (2011). A Study on Student Satisfaction in Pakistani Universities: The Case of Bahauddin Zakariya University, Pakistan. Asian Social Journal, Vol.7, No. 7, pp 209-219.
- Aman Ullah M., Imdadullah M. (2011). Impact Analysis for Regression Models with Heteroscedastic Errors. Pakistan Journal of Social Sciences. Vol. 31, No. 2, pp. 379-394.
- Atif A., Imdadullah M., Aman Ullah M. and Aslam M. (2011). Determinants of Economic Growth in Asian Countries: A Panel Data perspective. Pakistan Journal of Social Sciences. Vol. 31, No. 1, pp. 145-157.

**Conference Papers:**

- Qureshi, M. A.,
**Imdadullah, M.**, & Ramzan, M. (2011). Impact of Ownership on Performance and Capital Structure Decisions.*LUISS Guido Carli University, Rome, Italy.*

**Book:**

- Aslam, M., and
**Imdad Ullah, M.**(2023). Practicing R for Statistical Computing. Springer Nature. - Hina A. H., Maryam H.,
**Imdadullah M.**and Malhotra M. (2012).*Role of Hopelessness and Meaning in Life among Adults.*Createspace Independent Publishing platform. ISBN 978-1479187287.

I am the Author and Admin of itfeature.com, rfaqs.com, and gmstat.com