22 NATIONAL ORIGINS PROVISION OF IMMIGRATION LAW 
geographic changes; and, as I add them up roughly, it seems to 
me to come to more than 43 per cent of the 164,000. 
Mr. Boggs. I took it directly from the census figures from which 
the quotas were derived, rather than from the quotas themselves. 
Senator Reep. The question was as to the quotas. 
Mr. Boaes. Well, you see the geographic adjustments are made to 
the statistics relating to the pre-war countries, and those which you 
are looking at are the quotas relating to the postwar countries. 
Senator Remp. But the question was directed to the postwar 
quotas. What proportion of the quotas are affected by those changes 
in geography? I think you will find it runs about 60 per cent. The 
question runs that way. 
Mr. Boges. I presume that is true. 
The Cmamrman. Doctor Hill, in computing the national origins, 
did you take into consideration the differential of fecundity ¢ 
Doctor Hirt. In making that division between the original native 
stock and the immigrant stock or what I rather prefer to call the 
“ colonial stock” and “postcolonial stock,” the process which we 
followed did take care of anv difference that there mav have heen 
in fecundity. 
The Cramrmaxn. Will you explain now in some detail what that 
is and what the differential was? 
Doctor Hin. We did not determine the differential, but we used 
figures that disposed of it. The process was such a complicated one, 
volving the use of age statistics, that I really could not explain it 
briefly. But it did not involve the question of differential fecundity. 
We started with the percentage of the population that was born of 
native parents and the percentage that was born of foreign parents 
as given by age groups in the censuses in 1890, 1900, 1910, and 1920, 
and we did not make any assumptions as to birth rates or relative 
fecundity. We did not have to. 
The Carman. If you did not determine that, how did vou take it 
into consideration in reaching your figures? 
Doctor Hrrr. I might answer that question in this way: Suppose 
you knew or could ascertain in some way by using census figures 
and without applying birth rates or death rafes how many descend- 
ants two or more classes had at the present time, you would not need 
to work out the difference in fecundity. You could do it if you 
wanted to as a matter of information. "But if vou were interested 
only in how many descendants one class had and how many the 
other class had, and had data which enabled you to determine that 
without making any assumptions as to birth rates—the question of 
differential fecunditv would not arise. 
The Cuammman. That is what I am trying to ascertain—how this 
data arose and whether it is 2 part of the computations vou ficured 
in your report of 19287 
Doctor Hin. We did not have to consider it. 
The Caamman. You did not have to consider it? 
Doctor Hix. No. 
Senator Rerp. It was automatically taken care of ? 
Doctor Hiv. It was automatically taken care of; yes. I think it 
is only fair to add that when it came to determining the different 
national stocks—the German, Irish, English, and so forth—we did