SERIES CORRELATED WITH DEPOSITS 211 
The one given below is not intended to cover all of the relations 
discovered nor to take account of them in their varied forms. 
[ndeed, most, if not all, that has been said is in the nature of a 
summary, based as it is upon groupings of data for conditions 
widelv diverse. 
1. When time deposits as percentages of earning assets and of 
total deposits are relatively large, or when they increase from year 
to year, the following conditions obtain for all member banks 
in the country as a whole—the banks in each district being 
treated as a single institution—and certain of them for groups 
of banks in the Boston district: 
Gross earnings as percentages of earning assets tend to be large or 
to increase. 
Total expense as percentages of earning assets and of gross earnings 
tends to be large or to increase. 
Net earnings as percentages of earning assets tend generally to be 
small or to decrease. 
2. When account is taken of the relative size of district ratios 
of (1) time deposits to earning assets and to total deposits, and 
(2) of investments to earning assets, it is found that: 
(a) large gross earnings ratios and large total expense ratios accom- 
pany large time deposits and small investments ratios, and 
(b) large net earnings ratios accompany small time deposits and 
small investments ratios. 
Table 130 summarizes the nature of the correlations found for 
different series paired with deposits measured in various ways.