Andrey Veykher National Research University «Higher School оf Economics» in St-Petersburg, Russia The representative study of households based on the data.

Andrey Veykher National Research University

«Higher School оf Economics»in St-Petersburg, Russia

The representative study of households based on the data

of individual interviewing

Questions raised by clients of surveys

1) How many households with two children of school or preschool age are there in the city?

2) What is the percentage of single-livings person and couple households?

3) How are the households distributed by amount of total income?

4) What part of the households with total month income between $ 2,000 and $ 4,000 have real estate in the countryside and haven't car?

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Methodological problemIf the units of representative survey were individuals, how to recalculate the percentages, means, another

parameters of distributions of individuals into the same

parameters of distributions for units – households?

How many children are in your family?

Survey of households

Survey of individuals

the number of households with 2 or 3 children – possible

object of social assistance

the number of people who live in the

households with 2 or 3 children – data with

no practical value

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Differences of individuals and households distributions

single-living couple (2 adult)

in population (individuals) 20% 42%

in households

Data source: survey company “Crona Corsinto Ltd” (St-Petersburg, 2009)

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Differences of individuals and households distributions

single-living couple (2 adult)

in population 20% 42%

in

households

38% 40%

Data source: survey company “Crona Corsinto Ltd” (St-Petersburg, 2009)

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Algorithm as a part of complexComplex was created by survey company

“Crona Corsinto” (© 2001):• 4 steps stratified sample with quota

sampling “age + gender” at the end stage• Interview “face-to-face by houses

adjoining survey”• Algorithm of recalculating the data of

population into the data of households• Method of external validity of sampling and

implementing data collection ESRA - Lausanne - 2011- 07 - 22 7

Basic assumption

Households of M members of the target populations age are represented in the probability sample at M times more than households of single-living.

,%100

:

:

,..2,1 ,...2,1

,..2,1

n

j

n

iij

n

jij

j

Mn

Mn

X

where: • Xj – percentage of households with feature J;• I – number of adult household members, I = 1,2,3…;• nij – number of respondents in the survey, who have

feature J and belong to the household with I adult people

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Steps of calculation - start

Scale values in different

distributions

Adult person in household Sum

1 2 3 4100

No children (individuals) 12 18 12 8 50No children

(households)

One child (individuals) 2 14 18 4 38

One child (households)

Two children (individuals) 1 4 3 4 12Two children (households)

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1st steps of calculation – weight = 1


distributions

Adult person in household

Sum1 2 3 4


(households) 12One child

(individuals) 2 14 18 4 38One child

(households) 2Two children (individuals) 1 4 3 4 12Two children (households) 1 11ESRA - Lausanne - 2011- 07 - 22

2nd steps – weight = 0.5


distributions


Sum1 2 3 4


(households) 12 9One child


(households) 2 7Two children (individuals) 1 4 3 4 12Two children (households) 1 2 12ESRA - Lausanne - 2011- 07 - 22

3rd steps – weight = 0.33


distributions


Sum1 2 3 4


(households) 12 9 4One child


(households) 2 7 6Two children (individuals) 1 4 3 4 12Two children (households) 1 2 1 13ESRA - Lausanne - 2011- 07 - 22

4th steps – weight = 0.25


distributions


Sum1 2 3 4


(households) 12 9 4 2One child


(households) 2 7 6 1Two children (individuals) 1 4 3 4 12Two children (households) 1 2 1 1 14ESRA - Lausanne - 2011- 07 - 22

Steps of calculation - finish


distributions

Adult person in household Sum

1 2 3 4 48


(households) 12 9 4 2 27One child


(households) 2 7 6 1 16Two children (individuals) 1 4 3 4 12Two children (households) 1 2 1 1 5 15ESRA - Lausanne - 2011- 07 - 22

What is the household limits?

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In St-Petersburg:- more than 10% citizens live in another place than they are registered as electors;- 40% persons older after 70 live separately of adult children, but they have common family budget;- more often we observe how families of high middle class have two or three flats, where live older children without economical independence.

Condition and consequence of algorithm implement

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Condition – special question in survey questionnaires "How many people in your household who is over 18 years /or another limit of target population/?" Consequence – obtaining additional data for external validity for estimation of sample and data collection quality.

Result of real project

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In Saint-Petersburg (2007) the deviation of calculated from survey data number of children - 752 thousands – from statistics – 742 thousands (error - 1,3%) allows us to say that proportions of households distributions by number of children correspond to reality.

Conclusions:

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•There are possibilities to obtain many answers about household by more cheap survey of individuals.•Effective and attractive for clients control quality of sampling and data collection implementing is possible by estimation external data and the result of matrix sequential calculations on survey data about households.

Thank you for your attention!

NIU HSE in [email protected]

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Andrey Veykher National Research University «Higher School оf Economics» in St-Petersburg, Russia The representative study of households based on the data.

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