NORMS AND TRENDS IN DEPOSITS 45 
tions of change from year to year are studied for ratios classified 
according to their positions with respect to their levels in the first 
of each pair of years, it is seen that (1) those which are high 
in a first tend in the following year to fall, and those that are 
low in a first, tend in the following year to rise; and (2) the net 
percentage amounts of rise or fall vary directly with the percent- 
age amounts of dispersion of the ratios from the seven-year 
levels in the first years. The first fact for the 72 year-to-year 
changes—six for each of the twelve districts—is summarized in 
Table 30. The predominant tendency is for percentages which 
are high to decrease; for those which are low, to increase. That 
is, there is regression to type, all but 12 of the 72 ratios following 
this rule. 
TABLE 31 
COMPARATIVE PERCENTAGE AMOUNTS OF DEVIATION FROM DISTRICT 
LEVELS AND NET YEAR-TO-YEAR CHANGE IN RATIOS OF 
DEMAND Drrosits To EARNING ASSETS 
DIFFERENCES FROM DISTRICT AVERAGES, 1919-192§ 
Sign 
Number of 
Cases 
a 
Percentage 
Groups 
Average 
5.00 and over 
4.00 to 6.00 
2.00 to 4.00 
Inder 2 an 
Under 2.00 
2,00 t0 4.00 
4.00 to 6.00 
6.00 and over 
Average 
Average 
Percentage 
NET PERCENTAGE 
CHANGE FROM 
YEAR TO YEAR 
T 
—~ 16 
06 
81 
2 ob 
3 
t. 05 
46.00 
+2 .60 
The tendency in the ratios for the net percentage amounts of 
change to vary directly with their percentage amounts of disper- 
sion from the district averages is shown by direction and amount 
in Table 31. This tendency, so apparent for the ratios of demand 
deposits to earning assets, was not found for ratios of total 
deposits to earning assets, although it held for the ratios of loans 
and discounts and for investments to earning assets, the trend in 
the former case being upward from 1919 to 1921 and downward