1) The writer Dicussed the emigration regions in Sikoku on the ground of the World Agricaltural Cencus in 1950. Here the emigrants are meant as porters, day-labourers, maid-servants, workmen, appentices, etc., who are at work in another provinces.
2) Hitherto the emigration was studied geographically and the causes of it are attributed to the lack of paddy fields, poverty of villages, and so on. But the causes are not so simple as said before. Especially from the geogra-phical point of view they must be attributed to the structure of the regions, in another words, the regions themselves prepare the mobility of the iuhabitants.
3) The writer researched statistically the emigration regions in Sikoku, from the standpoint of the conbination of three factors: the ratio of paddy fields (X
1), specialised farmers (X
2) and infinitesimal farmers (X
3).
4) At first the correlation coefficients bet wveen the ratio of the emigrants to all farmers and that of three factors are calculated (Table 1.). According to the results, their correlation are all lineal and the test by correlation covariance demonstrated that the regression coefficients, bi, in the equation Y=bo+b1X1 are all significant.
5) Then .the multiple correlation coefficient between Y and X
1, X
2, X
3, and the multiple regression equation are acquired as follows:_??_The estimated values of the emigrants by the equation almost coincide to the actual values of them. Therefore by the test of the partial regression coefficient, the factors of the emigration could be descriminated in each regions.
6) The results are as follows: _??_Mima-Gun, Miyosi-Gun._??_ Owing to A and B, especially to A. _??_Nisiuwa-Gun_??_ Owing to A and B, secondarilly to C _??_Shodo-Gun_??_ Owing to B and C secondarilly to A CKaifu-Gun, Ochi-Gun, Kitauwa-Gun, Minamiuwa-Gun._??_ Owing to B and C. Here A is low ratio of paddy fields, B, low ratio of specialised farmers, C, high ratio of infinitesimal farmers.
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