COEX AND HOG CORRELATIONS 
27 
Among the other hog variables, total western slaughter shows the 
correlations with corn crop and price to be expected from the sum of 
western summer and winter slaughter. Total eastern slaughter 
shows, for the most part, parallel but smaller correlations. It is to 
be expected that the corn crop would have less effect on eastern than 
on western slaughter. 
The farm price of hogs taken as of January 1, the exact middle of 
the winter season (November to February, inclusive) should show 
correlations approximately the same as those shown by winter price. 
In fact, there is a close similarity. The farm price, however, seems 
to lag somewhat behind the packer's cost. 
The two factors of corn crop — acreage and yield — show correla- 
tions with the hog variables in approximate proportion to their 
relative influence on fluctuations in the crop. The correlations with 
yield are thus very close to those of crop itself, whereas those with 
acreage are much smaller and only the peak effects are clearly 
brought out. 
Table 7.- — The percentage to which the hog variables are determined by various 
factors or combinations of factors 
[The years of the factors are indicated in italics in parentheses, for the same hog-packing year (summer 
and winter), 2 for the preceding packing year, etc. Compare with the regression formulas of Table 11] 
Item 
Single 
Single 
corn 
summer 
price 
weight 
Per cent 
Per cent 
44(2) 
46(2) 
31 a) 
40(2) 
26(7) 
37 (2) 
40(0) 
23(0) 
34(7) 
23(2) 
28(2) 
61(2) 
52(2) 
28(2) 
26(2) 
69(2) 
30(2) 
45(2) 
16(2) 
35(2) 
30(2) 
48(2) 
Maximum single 
factor 
Summer hog price.-. 
Winter hog price 
Summer live weight 
Winter live weight,. 
Summer pack 
Winter pack 
Summer pork 
Winter pork 
Western pack 
Eastern pack 
Farm price 
Per cent 
58 W. pr. (2). 
47S.pr. (0). 
37 S. wt. (2). 
40 Crop (0). 
37 Crop (2) . 
61 S. wt. (2). 
52Cpr. (2). 
69 S. wt. (2). 
45 S. wt. (2). 
36 W. pr. (2). 
59S.pr. (0). 
Item 
Summer hog price- 
Winter hog price 
Summer live weight 
Winter live weight.. 
Summer pack 
Winter pack 
Summer pork 
Winter pork 
Total corn 
crops 
Per cent 
22(1,2) 
24 CO, 1,2,3) ... 
24 (1,2,3) 
(0,1,2,3).... 
Total corn 
prices 
Per cent 
50(1,2). 
55 (0,1,2 
31 (1,2,3 
47 (0, 1, 2 
57 (1,2,8) I 57(2,2,3 
27 (0,1,2). 
§2(1,2,3). 
32 (0,2, J 
37 (0, 2 
76 (1,2,3 
41(0,1,2 
3).... 
3). 
Corn crops 
and summer 
live weight 
Miscellaneous 
Per cent 
69(1-1,2).. 
67 (0, 1-0, 1) 
47 (1-2) .... 
55 (0-0)..... 
59(2-2,2).. 
64(2,2-2).. 
61 (1-1,2)... 
12(1,2-1)... 
Per cent 
76 Corn pr. (1), S. wt. (1,2). 
71 Corn pr. (1,2), S. wt. (2). 
60 Corn pr. (2), W. pr. (2). 
59 Crop (O),S.wt.(0),S. pack (0). 
67 W. wt. (1,2), S. wt. (2). 
66 Cornpr. (2), S. pr. (2). 
71 W. wt. (1, 2), S.wt. (2). 
The degree to which the hog variables are determined by corn 
crop or price can be found by calculating coefficients of determination 
(the squares of the coefficients of multiple correlation)^ Table 7 
shows the maximum percentage determination by a single pre- 
ceding crop or price and the percentage determination by all preceding 
crops or by all preceding prices, as well as other coefficients which 
will be discussed later. Summer slaughter and winter weight are 
determined 57 per cent and 49 per cent, respectively, by preceding 
crops and practically the same by preceding corn prices. On the 
