Rome, May 2014 Structural variables Weighting the Spanish annual subsample

Rome, May 2014 LFS. EPA: Encuesta de Población Activa Quarterly Continuous Survey. Target population: People living in family dwellings. Results by province (NUTS 3). (52 provinces).

Rome, May 2014

LFS. EPA: Encuesta de Población Activa

Rome, May 2014 Sample design: Two-stage stratified sampling -Primary sampling units (PSU): Census Sections (Areas with inhabitants. About in Spain). -Secondary sampling units (SSU): Family dwellings (18 m.) Strata.- PSU’s stratification process is performed according to the size of the municipality which the census section belongs to. A maximum of 9 strata are defined in each province (NUTS3). Sample size dwellings, distributed among census sections persons aged 16 or over LFS. EPA: Encuesta de Población Activa

Rome, May 2014 Every quarter, each primary sampling unit (PSU) is visited in one of the 13 weeks of the quarter. Sample households are interviewed for six consecutive quarters. Rotation groups.- A sixth part of the sample of households is renewed each quarter. To this end the sample of PSU’s is divided into six subsamples named rotation groups. LFS. EPA: Encuesta de Población Activa

Rome, May 2014 LFS. EPA: Encuesta de Población Activa

Rome, May 2014 Sample distribution The sample is evenly distributed throughout the time With this goal, next four variables have been taken into account: Week Province (NUTS3) and NUTS2 Stratum Rotation group LFS. EPA: Encuesta de Población Activa

Rome, May 2014 LFS. EPA: Encuesta de Población Activa | | Week | | | |01 |02 |03 |04 |05 |06 |07 |08 |09 |10 |11 |12 |13 | |Prov |Stratum | | | | | | | | | | | | | | | | | | | | | | | | | | | |29 |1 | 3| 3| 3| 2| 3| 3| 2| 2| 3| 3| 3| 3| 3| | | |4 | 1| 1| 1|.| 1| 1|.| 1|.| 1| 1| 1| 1| | | |5 | 2| 1| 1| 2| 1| 1| 2| 2| 2| 1| 1| 1| 1| | | |6 |.|.|.| 1| 1|.| 1|.| 1|.|.|.| 1| | | |7 |.| 1| 1| 1|.| 1| 1| 1|.| 1| 1| 1|.| | | |All | 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6|

Rome, May 2014 LFS. EPA: Encuesta de Población Activa | | Week | | | |01 |02 |03 |04 |05 |06 |07 |08 |09 |10 |11 |12 |13 | |Prov |Rot.Group| | | | | | | | | | | | | | |29 |1 | 1| 1| 1| 1|.| 2| 1| 1| 1| 1| 1| 1| 1| | | |2 | 1|.| 1| 2| 1| 1| 1| 1|.| 2| 1| 1| 1| | | |3 | 1| 1| 1|.| 2| 1| 1| 1| 1| 1| 1| 1| 1| | | |4 | 1| 2| 1| 1| 1|.|.| 1| 2| 1|.| 2| 1| | | |5 | 1| 1| 1| 1| 1|.| 2| 1| 1|.| 2| 1| 1| | | |6 | 1| 1| 1| 1| 1| 2| 1| 1| 1| 1| 1|.| 1| | | |All | 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6| 6|

Rome, May | | Rot. Group | | | | 1 | 2 | 3 | 4 | 5 | 6 | |CPRO |ESTRATUM | | | | | | | | | | | | | |29 |1 | 6| 6| 6| 6| 6| 6| | | |4 | 2| 2| 1| 2| 1| 2| | | |5 | 3| 3| 3| 3| 3| 3| | | |6 |.| 1| 1| 1| 1| 1| | | |7 | 2| 1| 2| 1| 2| 1| | | |All | 13| 13| 13| 13| 13| 13|

Rome, May 2014 Selection of the sample Primary Sampling Units (census sections) are selected with proportional probability to the number of family dwellings Secondary Sampling Units (dwellings): are selected with equal probability within each PSU. Systematic sampling. In this way, every sampling household in a stratum has the same probability to belong to the sample: Self-weighted sample. LFS. EPA: Encuesta de Población Activa

Rome, May 2014 Weights 1.- Updated Horvitz_Thompson estimator Where P h is the population aged 16 or over by stratum in the middle of the quarter p h is the population aged 16 or over by stratum in the sample h=stratum ijk=PSU i, dwelling j, person k LFS. EPA: Encuesta de Población Activa

Rome, May Calibration Auxiliary variables, all of them for people aged 16 or more, by NUTS-2 Populations by five-years age and sex groups (22) Populations by nationality (Spanish- Other) Populations by province (NUTS-3) Calibration is made using the linear method of CALMAR (M=4) LFS. EPA: Encuesta de Población Activa

Rome, May 2014 LFS. Annual subsample

Rome, May 2014 The annual subsample is built with four rotation groups from EPA sample, one by quarter as follows: LFS. Annual subsample

Rome, May 2014 Comments. Pros and cons Subsample size is large enough, because there is no overlapping between rotation groups (4/6 of LFS sample) Subsample has a good distribution along weeks of the year Subsample do not increase non response in LFS, because sample households are in their sixth and last interview Response bias may occur due to the different behavior of the rotation groups. It could be corrected through the use of auxiliary information LFS. Annual subsample

Rome, May 2014 Weights 1.- Before calibration Weights entering the calibration process are calculated in the same way as in the quarterly LFS. Its general expression is: LFS. Annual subsample Where P h is the population aged 16 or more by stratum in the middle of the year P h is the population aged 16 or more by stratum in the subsample h=stratum ijk=PSU i, dwelling j, person k

Rome, May 2014 Weights 2.- Calibration. COMMISSION REGULATION (EC) No 377/2008 (4) In view of the importance of data on employment and unemployment, the totals for these indicators should be consistent whether they are produced from the annual sub-sample or on the basis of an annual average of the four quarterly full samples. ANNEX. 3. Consistency of totals Consistency between annual sub-sample totals and full-sample annual averages shall be ensured for employment, unemployment and inactive population by sex and for the following age groups: 15 to 24, 25 to 34, 35 to 44, 45 to 54, LFS. Annual subsample

Rome, May 2014 Weights 2.- Calibration. Auxiliary variables at national level Employed people by sex-and age groups 16-24; 25-34; ; 45-54; 55 and more(*) Unemployed persons by sex and age groups (*) Inactive persons by sex and age groups(*) Auxiliary variables at NUTS2 level Employed persons Unemployed persons Inactive persons Nationality (Spanish, other) LFS. Annual subsample

Rome, May 2014 Weights 2.- Calibration: auxiliary variables. Sample In order to make the calibration process in one step, a unique auxiliary variables vector that includes all the above variables is defined By doing so, simultaneous calibration with all auxiliary variables is assured. Population totals are obtained as the average of the LFS quarterly estimations in the year LFS. Annual subsample

Rome, May 2014 Weights 2.- Calibration. Procedure Households are the records of sample data file that goes into the calibration process (See excel files) Therefore, the weight for sampling households is also the common weight for all the persons aged 16 and more living in the same household So that, population and households estimates are coherent LFS. Annual subsample

Rome, May 2014 LFS. Annual subsample

Rome, May 2014 LFS. Annual subsample. Results

Rome, May 2014 LFS. Annual subsample. Results

Rome, May 2014 LFS. Annual subsample. Results

Rome, May 2014 LFS. Annual subsample. Results

Rome, May 2014 LFS. Annual subsample. Results

Rome, May 2014 LFS. Annual subsample. Results

Rome, May 2014 LFS. Annual subsample. Results

Rome, May 2014 LFS. Annual subsample. Results

Rome, May 2014 LFS. Annual subsample. Results

Rome, May 2014 LFS. Annual subsample. Results

Rome, May 2014 Muchas gracias