ROBUST PARAMETER ESTIMATION FOR RANDOM EFFECT PANEL DATA MODEL IN THE PRESENCE OF HETEROSCEDASTICITY AND INFLUENTIAL OBSERVATIONS
DOI:
https://doi.org/10.33003/fjs-2020-0404-689Keywords:
Heteroscedasticity; Influential observations; Panel Data; Random Effect Model; RHCCM; Weighted Least SquareAbstract
Panel data estimators can strongly be biased and inconsistent in the presence of heteroscedasticity and anomalous observations called influential observations (IOs) in Random effect (RE) panel data model. The existing methods (LWS, WLSF, WLSDRGP) address only the problem of IO but fail to remedy the combine problem of heteroscedasticity and IOs. Therefore, in this research we develop a method that will remedy the combine problem of heteroscedasticity and IOs based on robust heteroscedasticity consistent covariance matrix (RHCCM) estimator and fast improvised influential distance (FIID) weighting method denoted by WLSFIID. The simulation and numerical evidences show that our proposed estimation method is more efficient than the existing methods by providing smallest bias, and smallest standard error of HC4 and HC5.
References
Ali, D. & Hamidu, S., (2014). Environmental Hazard: Climate Change and Flooding, the Impact on the Built Environment in Nigeria. Journal of Environmental Sciences and Resources Management 6 (1), 136-144.
Bariweni, P.A, Tawari, C.C; & Abowei, C. (2012). Some Environmental Effects of Flooding in the Delta Region of Nigeria. International Journal of Fisheries and Aquatic Sciences, 1 (1), 35-46.
Cassey S., & Musser M., (2018). Religious actors and climate change: from advocacy to action Berkley Center for Religion, Peace & World Aairs White Paper November 2018 Goerge Town University
Christian, N. G. (2014): The Impact of Climate Change on African Traditional Religious Practices. https://doi.org/10.3390/environments2040435
Dasgupta, P., & Veerabhadran R., (2014). Pursuit of the Common Good. Science 345, 1457-1458.
Diffenbaugh, N. S., & Giorgi, F. (2012). Climate change hotspots in the CMIP5 global climate model ensemble. Climatic Change, 114(3-4), 813-822. doi: 10.1007/s10584-012-0570-x.
IPCC, (2014): Summary for policymakers. Climate Change 2014: Impacts, Adaptation, and Vulnerability. Part A: Global and Sectoral Aspects, C. B. Field et al., Eds., Cambridge University Press, 32 https:// www. ipcc.ch/ site/ assets/ uploads /2018/02/ ar5_ wgII _spm_ en.pdf
Jenkins W., (2013). The future of ethics: Sustainability, social justice, and religious creativity, Georgetown University Press, Washington, DC.
King, S. J. (2015). Response to the Roundtable on Climate Destabilization and the Study of Religion the End of the World as We Know It? Apocalypticism, Interdisciplinary, and the Study of Religion. Journal of the American Academy of Religion 83 (2), 422-431.
McLean I, & McMillan A (2009) Oxford Dictionary of Politics. Oxford University Press, India.
Madzwamuse, M., (2010). Climate governance in Africa—Adaptation strategies and institutions. Heinrich Boll Stiftung https:// www.boell.de/en/ecology/africa-climate-governance-in-africa-adaptation-strategies-and-institutions-10914.html
Nche, G. C. (2020). Beyond Spiritual Focus: Climate Change Awareness, Role Perception, and Action among Church Leaders in Nigeria Wea. Climate Soc. (2020) 12 (1): 149–169. https://doi.org/10.1175/WCAS-D-19-0001.1
NEST, (2011). Reports of research projects on impacts and adaptation. Building Nigeria’s Response to Climate Change Project Nigerian Environmental Study/Action Team Doc., 101
Niang, I., & Coauthors, (2014): Africa. Climate Change 2014: Impacts, Adaptation, and Vulnerability, Part B: Regional Aspects, V. R. Barros et al., Eds., Cambridge University Press, 1199–1265,https:// www.ipcc.ch/ site/assets/ uploads/ 2018/02/ WGIIAR5-Chap22_FINAL.pdf
Ojomo, E., M. Elliot, U. Amjad, & J. Bartram, (2015). Climate change preparedness: A knowledge and attitudes study in southern Nigeria. Environments, 2, 435 – 448 , https://doi.org/10.3390/environments2040435.
Ottuh, P.O. & Ottuh, J.A. (2012). Morality Without Religion: Re-thinking Tai Solarinism. Epha Journal of Religious Studies 8 (1), 77-88.
Serdeczny, O., & Coauthors, (2016). Climate change impacts in sub-Saharan Africa: From physical changes to their social repercussions. Reg. Environ. Change 17, 1585 – 1600 https://doi.org/10.1007/s10113-015-0910-2.
Schuman, S., Dokken, J-V., Van Niekerk, D. & Loubser, R.A., (2018). Religious beliefs and climate change adaptation: A study of three rural South African communities’, Jà mbá: Journal of Disaster Risk Studies 10(1), a509. https://doi.org/10.4102/jamba.v10i1.509
Sideris, L. H., (2015). Roundtable on Climate Destabilization and the Study of Religion on Letting a Thousand Flowers Bloom: Religious Scholarship in a Time of Crisis. Journal of the American Academy of Religion 83 (2), 356-372.
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