Distribution of surveys sample in Central
Statistical Bureau of Latvia.
Andris Fisenko
Central Statistical Bureau of Latvia
Outline
• Sampling frame
• Sampling designe
– Primary sampling units
– Secondary sampling units
• Three condacted surveys
Sampling frame
• 2000 Census counting areas• 2009 Edited by Population register
Primary sampling unit~4000 size of 500 dwellings
PSU serpentine in rural area
PSU location or coverage over 1 quarter
Primary sampling unit
1 week 1 quarter
Primary sampling unit
Number of samples in PSU ‘ life ’
PSU
LFS
HBS
SDT
2 X
6 X
6 X
Primary sampling unitPSU waves in LFS W1 W2 W3 W4 W5 W6 W7 W8Dwelling waves (sample 1) w1 w2 w3 w4 Dwelling waves (sample 2) w1 w2 w3 w4
Survey 1.wave 2.wave 3.wave 4.wave
LFS
HBS
SDT
Secondary sampling unit
Purpose of two stage sampling
Secondary sampling unit
Number of dwellings are used in one PSU
Survey SamplesDwellings
(max) TotalLFS 2 12 24HBS 6 14 84SDT 6 10 60
168
There is capacity for other houshold or person surveys
Conclusions
• Compute samples for continuous surveys according to the rotation pattern
• PSU for long period • Cost efficiency• Other social surveys