Principal Component Analysis for a Dynamical System of Emigration
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概要
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Dynamical system theory of migration is developed and applied to study causal relation among principal components describing the emigration from England and Wales, 1861-1900. The material is taken exclusively from Morgan (Appendix in Baines, 1985). Our method can elucidate driving forces of migration as far as information is included in the input data even implicitly. Morgan's data system is found to be controlled essentially by 4 principal components for over 90 % of its activity. The first principal component which governs about 50 % of system variations, however, is the combination of several variables in the data base, implying that Morgan's data base does not contain direct agencies responsible for emigration. The driving force of emigration depends by only about 50 % on 4 principal components describing 90 % of the system activity so that the controlling factors of the other 50 % lie in the outside of the system constructable from the data base.
- 近畿大学の論文
- 1996-02-20
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