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INSIGHTS FROM THE ORIGINAL DATA
The detailed decomposition of each of these movements is included in the data cube 'Insights From the Original Data'.
In considering the three components of the sample, it is important to remember that the matched common sample describes the change observed for the same respondents between March and April, while the other two components reflect differences between the aggregate labour force status of different groups of people.
While the rotation groups are designed to be representative of the population, the outgoing and incoming rotation groups will almost always have somewhat different characteristics, as a result of the groups representing a sample of different households and people. The design of the survey, including the weighting and estimation processes, ensures that these differences are generally relatively minor and seeks to ensure that differences in characteristics of rotation groups do not affect the representativeness of the survey and its estimates. Monthly estimates are always designed to be representative of their respective months, regardless of the relative contribution of the three components of the sample.
INCOMING ROTATION GROUP
In original terms, the incoming rotation group in April 2016 had a lower proportion of people employed full-time when compared to the rest of the sample (all other rotation groups except the incoming rotation group). 66.5% of employed people were employed full-time in the incoming rotation group, compared with 68.6% of employed people being employed full-time for the rest of the sample.
OUTGOING ROTATION GROUP
The outgoing rotation group in April 2016, which will be replaced by a new incoming rotation group in May 2016, had a similar employment to population ratio (60.8% in April 2016) compared to the sample as a whole (61.2% in April 2016). The proportion of people employed people who were employed full-time was 68.2% in the outgoing rotation group and 68.1% for the sample as a whole.
The unemployment rate and a participation rate of the outgoing rotation group in April 2016 were similar to the sample as a whole. The unemployment rate for the outgoing rotation group in April 2016 was 5.9%, which was slightly higher than the 5.7% for the whole sample. The participation rate for the outgoing rotation group in April 2016 was 64.6%, slightly lower than the 64.9% for the whole sample.
THE IMPORTANCE OF TREND DATA
As the gross flows and rotation group data are presented in original terms they are not directly comparable to the seasonally adjusted and trend data discussed elsewhere in the commentary, and are included to provide additional information for the original data. Since the original data are unadjusted, they have a considerable level of inherent sampling variability, which is specifically adjusted for in the trend series. The trend data provide the best measure of the underlying behaviour of the labour market and are the focus of the commentary in this publication.
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