Three problems often encountered when bilateral interaction data are analyzed by means of the log-normal gravity model: the bias created by the logarithmic transformation, the failure of the homoscedasticity assumption and the treatment of zero valued flows. When the interaction are count data type that takes non-negative integer values, to overcome these problems the literature suggests to use a Poisson gravity model instead of log-normal model. In this paper, using a real interaction phenomenon a comparative analysis of the two models is carried out. The most important results obtained highlights that if the phenomenon is correctly specified, the two specification of the gravity model have a very similar behaviour.
Published in | American Journal of Theoretical and Applied Statistics (Volume 4, Issue 4) |
DOI | 10.11648/j.ajtas.20150404.19 |
Page(s) | 291-299 |
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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. |
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Copyright © The Author(s), 2015. Published by Science Publishing Group |
Gravity Model, Poisson Model, Log Normal Model, Comparisons, Count Data
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APA Style
Giuseppe Ricciardo Lamonica. (2015). The Log Normal and the Poisson Gravity Models in the Analysis of Interactions Phenomena. American Journal of Theoretical and Applied Statistics, 4(4), 291-299. https://doi.org/10.11648/j.ajtas.20150404.19
ACS Style
Giuseppe Ricciardo Lamonica. The Log Normal and the Poisson Gravity Models in the Analysis of Interactions Phenomena. Am. J. Theor. Appl. Stat. 2015, 4(4), 291-299. doi: 10.11648/j.ajtas.20150404.19
AMA Style
Giuseppe Ricciardo Lamonica. The Log Normal and the Poisson Gravity Models in the Analysis of Interactions Phenomena. Am J Theor Appl Stat. 2015;4(4):291-299. doi: 10.11648/j.ajtas.20150404.19
@article{10.11648/j.ajtas.20150404.19, author = {Giuseppe Ricciardo Lamonica}, title = {The Log Normal and the Poisson Gravity Models in the Analysis of Interactions Phenomena}, journal = {American Journal of Theoretical and Applied Statistics}, volume = {4}, number = {4}, pages = {291-299}, doi = {10.11648/j.ajtas.20150404.19}, url = {https://doi.org/10.11648/j.ajtas.20150404.19}, eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.ajtas.20150404.19}, abstract = {Three problems often encountered when bilateral interaction data are analyzed by means of the log-normal gravity model: the bias created by the logarithmic transformation, the failure of the homoscedasticity assumption and the treatment of zero valued flows. When the interaction are count data type that takes non-negative integer values, to overcome these problems the literature suggests to use a Poisson gravity model instead of log-normal model. In this paper, using a real interaction phenomenon a comparative analysis of the two models is carried out. The most important results obtained highlights that if the phenomenon is correctly specified, the two specification of the gravity model have a very similar behaviour.}, year = {2015} }
TY - JOUR T1 - The Log Normal and the Poisson Gravity Models in the Analysis of Interactions Phenomena AU - Giuseppe Ricciardo Lamonica Y1 - 2015/07/04 PY - 2015 N1 - https://doi.org/10.11648/j.ajtas.20150404.19 DO - 10.11648/j.ajtas.20150404.19 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 - 291 EP - 299 PB - Science Publishing Group SN - 2326-9006 UR - https://doi.org/10.11648/j.ajtas.20150404.19 AB - Three problems often encountered when bilateral interaction data are analyzed by means of the log-normal gravity model: the bias created by the logarithmic transformation, the failure of the homoscedasticity assumption and the treatment of zero valued flows. When the interaction are count data type that takes non-negative integer values, to overcome these problems the literature suggests to use a Poisson gravity model instead of log-normal model. In this paper, using a real interaction phenomenon a comparative analysis of the two models is carried out. The most important results obtained highlights that if the phenomenon is correctly specified, the two specification of the gravity model have a very similar behaviour. VL - 4 IS - 4 ER -