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