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Palestine - Labor Force Survey, LFS 2013

Sampling
Sampling Procedure

THE CLEANED AND HARMONIZED VERSION OF THE SURVEY DATA PRODUCED AND PUBLISHED BY THE ECONOMIC RESEARCH FORUM REPRESENTS 100% OF THE ORIGINAL SURVEY DATA COLLECTED BY THE PALESTINIAN CENTRAL BUREAU OF STATISTICS



The methodology was designed according to the context of the survey, international standards, data processing requirements and comparability of outputs with other related surveys.

---> Target Population:
It consists of all individuals aged 10 years and older normally residing in their households in Palestine during 2013.

---> Sampling Frame:
The sampling frame consists of master sample which updated in 2011, each enumeration area consists of buildings and housing units with average of about 124 households in it. These master sample consists of 596 enumeration areas, we used 494 enumeration areas as a framework for the labor force survey sample in 2013, and these units have been used as primary sampling units (PSUs).

---> Sampling Size:
The estimated sample size in the first quarter is 7,676 households, in the second, third, and fourth quarter is 7,616 household for each quarter.

---> Sample Design
The sample of this survey is implemented periodically every quarter by PCBS since 1995, so this survey implement every quarter in the year (distributed over 13 weeks).
The sample is two stage stratified cluster sample with two stages:
first stage we select a systematic random sample of 494 enumeration areas for the whole round.
second stage we select a random area sample of average 16 households from each enumeration area selected in the first stage.

---> Sample strata:
The population was divided by:
1- Governorate (16 governorate)
2- Type of Locality (urban, rural, refugee camps).

---> Sample Rotation:
Each round of the Labor Force Survey covers all of the 494 master sample enumeration areas. Basically, the areas remain fixed over time, but households in 50% of the EAs are replaced each round. The same household remains in the sample for 2 consecutive rounds, left for the next two rounds, then selected for the sample for another two consecutive rounds before it is dropped from the sample. A 50% overlap is then achieved between both consecutive rounds and between consecutive years (making the sample efficient for monitoring purposes).

Response Rate

The survey sample consists of about 30,524 households of which 26,420 households completed the interview; whereas 17,162 households from the West Bank and 9,258 households in Gaza Strip. Weights were modified to account for non-response rate. The response rate in the West Bank reached 89.3% while in the Gaza Strip it reached 95.6%.

Weighting

The weight of statistical units (sampling unit) in the sample is defined as the mathematical inverse of the selection probability where the sample of the survey is two stage stratified cluster sample, so In the first stage, we calculate the weight of enumeration areas which depending on the probability of each enumeration area (a systematic random sample), then In the second stage we calculate weight of households in each enumeration area, Initial households weights resulted from product of weight of first stage and weight of second stage, final households weights obtained after adjustment of initial weights with the households estimates of the middle of each quarter of the year 2013 on the level of design strata (governorate, locality type ).
For the 10 years and over persons file we add the final household weight for each person, then we adjust the initial person weight with the persons estimates of the middle of each quarter of the year 2013 on the level of Region (West bank, Gaza strip), Sex (male, female ), Five –year age groups (14groups) then we obtain the final adjusted person weight.



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