The reference periods between the Census Bureau's annual estimates of income and our monthly estimates of income are quite different.
During the reference periods, a total of 37 maintenance workers died in 33 accident cases.
It uses a range of potential historical reference periods (5, 10, 15, and 20 years).
(4) and (5), although the reference periods are not equal to each other.
The EU's direct payments to farmers are based on historical reference periods - a system the Commission wants to reform.
However, the use of these values for design for reduced reference periods (i.e., "shorter exposure periods") may be excessively conservative.
Both the maximum projection of rainfall intensity and the maximum change in future projections are affected by using different reference periods for different frequencies and durations.
The three measures include two reference periods, 30 days and 12 months, and use three distinct ways of assembling the graduated QF data.
Several envelopes of structural responses are considered: the mean of extremes and the 86% quantiles of extremes, together with two reference periods (10 min and 1 h).
Surveys based on recall interviews collect higher food quantities compared to those based on diaries, but the difference decreases with long reference periods.
Although for many indicators, data series up to the year 2015 or 2016 were available, this approach has the drawback that the indicators can have different reference periods.
