RELATIONSHIP of WEEKLY WAGE RATE, HOURS WORKED PER
WEEK, AND UNIT PRIME COST

230C

250

INDEX NUMBER (1914 = 100)

EEKL' WAGE RATE

20(

=
su
£9

15¢

INIT PRIME COS

OC

RB (

A
1914

YOURS PER WEE

1919 1920 192 1922 (923 1924 1925 1926

CHART 17.—While the weekly wage rate increased from 1921-1928, unit prime cost diminished, due to
the more economical use of materials and labor and increased efficiency in output.