# Title 5

## SECTION 591.210

### 591.210 What are weights

§ 591.210 What are weights?(a) A weight is the relative importance or share of a subpart of a group compared with the total for the group. A weight is frequently expressed as a percentage. For example, in a pie chart, each wedge has a percentage that represents its relative importance or the size of the wedge compared with the whole pie.

(b) OPM uses two kinds of weights: Consumer expenditure weights and employment weights.

(1) *Consumer expenditure weights.* The consumer
expenditure weight for a category of expenditures (e.g., Food) is
the relative importance or share (often expressed as a percentage)
of that category in terms of total consumer expenditures. OPM
derives consumer expenditure weights from the tabulated results of
the Bureau of Labor Statistics (BLS) Consumer Expenditure Survey
(CES).

(2) *Employment weights.* The employment weight is the
relative employment population of the survey area compared with the
employment population of the COLA area as a whole. OPM uses the
number of General Schedule employees in the survey area to compute
employment weights. OPM uses these employment weights as described
in § 591.216(b).