A Comparison of Count Regression Models on Modeling of Instructors Publication Factors: Application of Ethiopian Public Universities

Alebachew Abebe

doi:doi:10.11648/j.ajtas.20190805.12

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A Comparison of Count Regression Models on Modeling of Instructors Publication Factors: Application of Ethiopian Public Universities

Alebachew Abebe

Published in American Journal of Theoretical and Applied Statistics (Volume 8, Issue 5)

Received: 10 July 2019 Accepted: 5 August 2019 Published: 23 September 2019

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Abstract

Instructors’ publication (IP) is one of a major activity in higher education institutes. Currently, IP faced problem both high prevalence and severity in Ethiopian public universities. Publication was affected approximately around 352 (73.9%) instructors have not done publication in Ethiopian public universities even if there is a problem in both developing and developed countries. Since, the outcomes from IP factors are mostly discrete variable; they are often modeled using advanced count regression models. It is therefore, the purpose of this study was to determine the appropriate count regression model that efficiently fit the IP data and further to identify the key risk factors contributing significantly to IP in public universities in Ethiopian. The data were collected between November 2015 through November 2016 from selected thirteen (13) public universities in Ethiopian through both questionnaires and interview. A cross sectional study design was employed using IP data. A simple random sampling technique was applied to the population of Ethiopian public universities to obtain a sample of 13 universities or 476 individual instructors were selected. The average age of the 476 participants were found to be 30 years with 31 (6.5%) being females and 445 (93.5%) being males. The count outcomes obtained were modeled using count regression models which included Poisson, Negative Binomial, Zero-Inflated Negative Binomial (ZINB), Zero-Inflated Poisson (ZIP) and Poisson Hurdle regression models. In order to compare the performance and the efficiency of the listed count regression models with respect to the IP data, the various model selection methods such as the Vuong Statistic (V) and Akaikes Information Criterion (AIC) were used. The ZINB count regression model with reference to the values of the Vuong Statistic and AIC were selected as the most appropriate and efficient count regression model for modeling IP data. Based on the ZINB model the variables age, experience, average work-load, association member and motivation to work were statistically significant risk factors contributing to IP in Ethiopian public universities.

Published in	American Journal of Theoretical and Applied Statistics (Volume 8, Issue 5)
DOI	10.11648/j.ajtas.20190805.12
Page(s)	169-178
Creative Commons	This is an Open Access article, distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium or format, provided the original work is properly cited.
Copyright	Copyright © The Author(s), 2019. Published by Science Publishing Group

Keywords

IP, ZINB, ZIP, Poisson Hurdle, V

References

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[8]	Gibb, A., Haskins, G., Hannon, P., & Robertson, I. (2012). Leading the Entrepreneurial University: Meeting the entrepreneurial development needs of higher education institutions. University of Oxford. Retrieved from http://eulp.co.uk/wp-content/uploads/2014/05/EULP-LEADERS-PAPER.pdf
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[16]	De Coster, R., & Butler, C. (2005). Assessment of proposals for new technology ventures in the UK: characteristics of university spin-off companies. Technovation, 25 (5), 535-543. doi: 10.1016/j.technovation.2003.10.002.
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APA Style

Alebachew Abebe. (2019). A Comparison of Count Regression Models on Modeling of Instructors Publication Factors: Application of Ethiopian Public Universities. American Journal of Theoretical and Applied Statistics, 8(5), 169-178. https://doi.org/10.11648/j.ajtas.20190805.12

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ACS Style

Alebachew Abebe. A Comparison of Count Regression Models on Modeling of Instructors Publication Factors: Application of Ethiopian Public Universities. Am. J. Theor. Appl. Stat. 2019, 8(5), 169-178. doi: 10.11648/j.ajtas.20190805.12

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AMA Style

Alebachew Abebe. A Comparison of Count Regression Models on Modeling of Instructors Publication Factors: Application of Ethiopian Public Universities. Am J Theor Appl Stat. 2019;8(5):169-178. doi: 10.11648/j.ajtas.20190805.12

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@article{10.11648/j.ajtas.20190805.12,
  author = {Alebachew Abebe},
  title = {A Comparison of Count Regression Models on Modeling of Instructors Publication Factors: Application of Ethiopian Public Universities},
  journal = {American Journal of Theoretical and Applied Statistics},
  volume = {8},
  number = {5},
  pages = {169-178},
  doi = {10.11648/j.ajtas.20190805.12},
  url = {https://doi.org/10.11648/j.ajtas.20190805.12},
  eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.ajtas.20190805.12},
  abstract = {Instructors’ publication (IP) is one of a major activity in higher education institutes. Currently, IP faced problem both high prevalence and severity in Ethiopian public universities. Publication was affected approximately around 352 (73.9%) instructors have not done publication in Ethiopian public universities even if there is a problem in both developing and developed countries. Since, the outcomes from IP factors are mostly discrete variable; they are often modeled using advanced count regression models. It is therefore, the purpose of this study was to determine the appropriate count regression model that efficiently fit the IP data and further to identify the key risk factors contributing significantly to IP in public universities in Ethiopian. The data were collected between November 2015 through November 2016 from selected thirteen (13) public universities in Ethiopian through both questionnaires and interview. A cross sectional study design was employed using IP data. A simple random sampling technique was applied to the population of Ethiopian public universities to obtain a sample of 13 universities or 476 individual instructors were selected. The average age of the 476 participants were found to be 30 years with 31 (6.5%) being females and 445 (93.5%) being males. The count outcomes obtained were modeled using count regression models which included Poisson, Negative Binomial, Zero-Inflated Negative Binomial (ZINB), Zero-Inflated Poisson (ZIP) and Poisson Hurdle regression models. In order to compare the performance and the efficiency of the listed count regression models with respect to the IP data, the various model selection methods such as the Vuong Statistic (V) and Akaikes Information Criterion (AIC) were used. The ZINB count regression model with reference to the values of the Vuong Statistic and AIC were selected as the most appropriate and efficient count regression model for modeling IP data. Based on the ZINB model the variables age, experience, average work-load, association member and motivation to work were statistically significant risk factors contributing to IP in Ethiopian public universities.},
 year = {2019}
}

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TY  - JOUR
T1  - A Comparison of Count Regression Models on Modeling of Instructors Publication Factors: Application of Ethiopian Public Universities
AU  - Alebachew Abebe
Y1  - 2019/09/23
PY  - 2019
N1  - https://doi.org/10.11648/j.ajtas.20190805.12
DO  - 10.11648/j.ajtas.20190805.12
T2  - American Journal of Theoretical and Applied Statistics
JF  - American Journal of Theoretical and Applied Statistics
JO  - American Journal of Theoretical and Applied Statistics
SP  - 169
EP  - 178
PB  - Science Publishing Group
SN  - 2326-9006
UR  - https://doi.org/10.11648/j.ajtas.20190805.12
AB  - Instructors’ publication (IP) is one of a major activity in higher education institutes. Currently, IP faced problem both high prevalence and severity in Ethiopian public universities. Publication was affected approximately around 352 (73.9%) instructors have not done publication in Ethiopian public universities even if there is a problem in both developing and developed countries. Since, the outcomes from IP factors are mostly discrete variable; they are often modeled using advanced count regression models. It is therefore, the purpose of this study was to determine the appropriate count regression model that efficiently fit the IP data and further to identify the key risk factors contributing significantly to IP in public universities in Ethiopian. The data were collected between November 2015 through November 2016 from selected thirteen (13) public universities in Ethiopian through both questionnaires and interview. A cross sectional study design was employed using IP data. A simple random sampling technique was applied to the population of Ethiopian public universities to obtain a sample of 13 universities or 476 individual instructors were selected. The average age of the 476 participants were found to be 30 years with 31 (6.5%) being females and 445 (93.5%) being males. The count outcomes obtained were modeled using count regression models which included Poisson, Negative Binomial, Zero-Inflated Negative Binomial (ZINB), Zero-Inflated Poisson (ZIP) and Poisson Hurdle regression models. In order to compare the performance and the efficiency of the listed count regression models with respect to the IP data, the various model selection methods such as the Vuong Statistic (V) and Akaikes Information Criterion (AIC) were used. The ZINB count regression model with reference to the values of the Vuong Statistic and AIC were selected as the most appropriate and efficient count regression model for modeling IP data. Based on the ZINB model the variables age, experience, average work-load, association member and motivation to work were statistically significant risk factors contributing to IP in Ethiopian public universities.
VL  - 8
IS  - 5
ER  -

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Alebachew Abebe

Department of Statistics, College of Computing & Informatics, Haramaya University, Dire Dawa, Ethiopia

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Alebachew Abebe. (2019). A Comparison of Count Regression Models on Modeling of Instructors Publication Factors: Application of Ethiopian Public Universities. American Journal of Theoretical and Applied Statistics, 8(5), 169-178. https://doi.org/10.11648/j.ajtas.20190805.12

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ACS Style

Alebachew Abebe. A Comparison of Count Regression Models on Modeling of Instructors Publication Factors: Application of Ethiopian Public Universities. Am. J. Theor. Appl. Stat. 2019, 8(5), 169-178. doi: 10.11648/j.ajtas.20190805.12

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AMA Style

Alebachew Abebe. A Comparison of Count Regression Models on Modeling of Instructors Publication Factors: Application of Ethiopian Public Universities. Am J Theor Appl Stat. 2019;8(5):169-178. doi: 10.11648/j.ajtas.20190805.12

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@article{10.11648/j.ajtas.20190805.12,
  author = {Alebachew Abebe},
  title = {A Comparison of Count Regression Models on Modeling of Instructors Publication Factors: Application of Ethiopian Public Universities},
  journal = {American Journal of Theoretical and Applied Statistics},
  volume = {8},
  number = {5},
  pages = {169-178},
  doi = {10.11648/j.ajtas.20190805.12},
  url = {https://doi.org/10.11648/j.ajtas.20190805.12},
  eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.ajtas.20190805.12},
  abstract = {Instructors’ publication (IP) is one of a major activity in higher education institutes. Currently, IP faced problem both high prevalence and severity in Ethiopian public universities. Publication was affected approximately around 352 (73.9%) instructors have not done publication in Ethiopian public universities even if there is a problem in both developing and developed countries. Since, the outcomes from IP factors are mostly discrete variable; they are often modeled using advanced count regression models. It is therefore, the purpose of this study was to determine the appropriate count regression model that efficiently fit the IP data and further to identify the key risk factors contributing significantly to IP in public universities in Ethiopian. The data were collected between November 2015 through November 2016 from selected thirteen (13) public universities in Ethiopian through both questionnaires and interview. A cross sectional study design was employed using IP data. A simple random sampling technique was applied to the population of Ethiopian public universities to obtain a sample of 13 universities or 476 individual instructors were selected. The average age of the 476 participants were found to be 30 years with 31 (6.5%) being females and 445 (93.5%) being males. The count outcomes obtained were modeled using count regression models which included Poisson, Negative Binomial, Zero-Inflated Negative Binomial (ZINB), Zero-Inflated Poisson (ZIP) and Poisson Hurdle regression models. In order to compare the performance and the efficiency of the listed count regression models with respect to the IP data, the various model selection methods such as the Vuong Statistic (V) and Akaikes Information Criterion (AIC) were used. The ZINB count regression model with reference to the values of the Vuong Statistic and AIC were selected as the most appropriate and efficient count regression model for modeling IP data. Based on the ZINB model the variables age, experience, average work-load, association member and motivation to work were statistically significant risk factors contributing to IP in Ethiopian public universities.},
 year = {2019}
}

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TY  - JOUR
T1  - A Comparison of Count Regression Models on Modeling of Instructors Publication Factors: Application of Ethiopian Public Universities
AU  - Alebachew Abebe
Y1  - 2019/09/23
PY  - 2019
N1  - https://doi.org/10.11648/j.ajtas.20190805.12
DO  - 10.11648/j.ajtas.20190805.12
T2  - American Journal of Theoretical and Applied Statistics
JF  - American Journal of Theoretical and Applied Statistics
JO  - American Journal of Theoretical and Applied Statistics
SP  - 169
EP  - 178
PB  - Science Publishing Group
SN  - 2326-9006
UR  - https://doi.org/10.11648/j.ajtas.20190805.12
AB  - Instructors’ publication (IP) is one of a major activity in higher education institutes. Currently, IP faced problem both high prevalence and severity in Ethiopian public universities. Publication was affected approximately around 352 (73.9%) instructors have not done publication in Ethiopian public universities even if there is a problem in both developing and developed countries. Since, the outcomes from IP factors are mostly discrete variable; they are often modeled using advanced count regression models. It is therefore, the purpose of this study was to determine the appropriate count regression model that efficiently fit the IP data and further to identify the key risk factors contributing significantly to IP in public universities in Ethiopian. The data were collected between November 2015 through November 2016 from selected thirteen (13) public universities in Ethiopian through both questionnaires and interview. A cross sectional study design was employed using IP data. A simple random sampling technique was applied to the population of Ethiopian public universities to obtain a sample of 13 universities or 476 individual instructors were selected. The average age of the 476 participants were found to be 30 years with 31 (6.5%) being females and 445 (93.5%) being males. The count outcomes obtained were modeled using count regression models which included Poisson, Negative Binomial, Zero-Inflated Negative Binomial (ZINB), Zero-Inflated Poisson (ZIP) and Poisson Hurdle regression models. In order to compare the performance and the efficiency of the listed count regression models with respect to the IP data, the various model selection methods such as the Vuong Statistic (V) and Akaikes Information Criterion (AIC) were used. The ZINB count regression model with reference to the values of the Vuong Statistic and AIC were selected as the most appropriate and efficient count regression model for modeling IP data. Based on the ZINB model the variables age, experience, average work-load, association member and motivation to work were statistically significant risk factors contributing to IP in Ethiopian public universities.
VL  - 8
IS  - 5
ER  -

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