130 ORIGINS AND INTERMARRIAGE IN THE REGISTRATION AREA 
the figure for the average group. One finds also that the combined positive influence of 
length of residence and surplus of males was a little over twice as great as was the negative 
influence of large numbers. 
By substituting values for Xe, Xs and X4 in the above equation for each of the specified 
stocks (using data given in Columns 3, 4 and 5 of Table 70) the expected value of Xj was 
computed for each group. These are plotted in Chart 28 and the several points are con- 
nected by straight lines. The actual values of Xi, as given in Column 1, Table 70, are also 
‘ndicated on the chart and attention is directed to their distribution and its significance. 
In the light of length of residence (as shown by percentage North American born), 
percentage surplus males and the size of the group in Canada, the expected percentage of 
intermarriage for the men of Swedish origin was 25 p.c.; the actual amount which had 
occurred was 45 p.c., a proportion four-fifths greater than expectation. On the other hand, 
the expected percentage of intermarriage for the men of Ukrainian origin was 20 p.c.; the 
actual only 9 p.c. or less than half the expected. Of the 20 stocks, 19 are listed below, with 
the actual amount of intermarriage expressed as a percentage of the computed expectation 
in each case. The twentieth is the Hebrew stock, and as the expected rate in this case 
worked out to practically zero, to express the 4 p.c. which actually occurred as a percentage 
of expectation would be meaningless. 
Rank 
Origin 
Actual 
intermarriage 
a8 percentage 
of expected 
{for males) 
O.6c. 
Belg uuen sunirnen nwwniwnin vo —_— 
wadivh... o: cvsmieeeniaves coves PTRO—— 
YEN 5 0 0 des a BERES BF RISER DEERE £8 SEARED § 
WHIRL inde fn dorian ARSE FRBRIENS SARS DER GY 
B35 7 PRN 
2echoSloVak. ...u..iein iii 
TOTWERIAN Lover itive initia iaa reins 
PHAR cy wrsann vn vussmass wwe [EETE———. 
BUBB viv ve rans an RS ———— 
ricinus snumnns rvs we wea ww. ga 
WOR. os ivnes sien vr vere - 
LoUMAanIBN.. iia aes 4 
serbo-Croatian..........o.covvnnn Ep 
POlSR. aaa 
[R111 SF: SAPP 
NEB cocscmmsisnmininss ws wasn wis wine se WAN 
TUNGORIOI. vos pamsimnss wwwvmns como pRR Rr Siw 
celandie............ouvun. 
‘krainian..... .. .... 
538 
176 
‘73 
“27 
iT 
The reason the coefficient of correlation was not higher than + -76 is made evident by 
the above table. For many of the peoples the actual amount of intermarriage was con- 
siderably in excess of the expected; for others, the actual rate fell far short of expectation. 
Thus length of residence, sex distribution and numerical strength combined, are not adequate 
to account for the behaviour of the different stocks in respect of intermarriage. The per- 
formance of many of the groups differs very considerably from what was anticipated. The 
question naturally arises as to why this should be so, and in seeking an answer one finds it 
necessary to pass from the realm of extraneous and more or less accidental causes to a 
consideration: of influences more intimately associated with hereditary and cultural 
characteristics of the various stocks. Indeed there could be no more conclusive proof 
that peculiarities of the different origin groups are of major importance in the matter of 
assimilation than the fact that these external factors are not adequate to account for the 
pehaviour of the data. 
What then are the differences in terms of which an explanation must be found? There 
are many types and only a few of the principal ones will be mentioned. 
(1) Physiological This, coupled with associated psychological implications, occurs 
first to the mind of the biologist when the term “stock” iz mentioned. Indeed the connota- 
tion of the word is often confined to such characteristics. We have seen that between stocks 
of different colour such barriers are of maior importance. How important phvsical differences