Characteristics of Households - Childinfo.org

Sampling Frame and Selection of ClustersThe 2002 Serbian Population Census frame was used forthe selection of clusters. Census enumeration areas weredefined as primary sampling units (PSUs), and were selectedfrom each of the sampling strata by using a systematicpps (probability proportional to size) sampling procedure,based on the estimated sizes (number of households) of theenumeration areas from the 2002 Population Census. Thefirst stage of sampling was thus completed by selecting therequired number of enumeration areas from each of the 25strata (Areas), by urban and rural domains separately.Listing ActivitiesSince the sampling frame (the 2002 Population Census)was not up-to-date, a new listing of households wasconducted in all the sample enumeration areas priorto the selection of households. For this purpose, listingteams were formed, who visited each enumeration area,and listed the occupied households. The StatisticalOffice of the Republic of Serbia was responsible forupdating the household lists. Regional Offices formedthe teams responsible for listing and fieldwork. For eachteam, the list of all households in the selected clusterfrom the Census 2002 was provided. The interviewers’task was to go to the addresses listed and to mark anychange that had happened, e.g. the dwelling didn’t existany more, the household had moved away from thedwelling and another household was living there, andto note the number of children under five living in thehousehold. The listing process was performed duringJune and July 2010.Selection of HouseholdsUpdated lists of households were prepared by the listingteams in the field for each sample enumeration area andsent to the Statistical Office of the Republic of Serbia.Afterwards, the updated lists of the households in theenumeration areas were classified into two categories:households with children under 5 and households withoutchildren. According to the number of listed households foreach category per enumeration area and the desired samplesize of 3600 households with children under 5, a differentnumber of households to be selected from each categoryin the sample enumeration areas was determined. Thenumber of households with children under 5 per cluster wascalculated as 10, excluding clusters from the Belgrade region,where 12 households with children under 5 were assigned.In the case of clusters with less than 10 (12 for Belgraderegion) updated households with children under 5, all ofthese households were included in the sample. The numberof households without children under 5 was obtained as thedifference between the overall number of sample householdsper cluster (17) and the number of households withchildren under 5 allocated in the cluster. The householdsfrom both categories were selected systematically withequal probabilities. During the data collection, another 85households (50 with children under-5 and 35 householdswithout children under-5) were included in the sample, inthe case when interviewers identified that two householdswere living in the dwelling, instead of only the one listed.Calculation of Sample WeightsThe Serbia Multiple Indicator Cluster Survey sample is notself-weighting, due to disproportional allocation of the sampleto the strata, categories of households (with/without childrenunder 5) and the final non-response. In order to obtainrepresentative results for Serbia, sample weights were used.The major component of the weight is the reciprocal valueof the sampling fraction employed in selecting the numberof sample households in a particular sampling stratum (h),from PSU (i) within category (c):W hicf hichic= 1The term f hic , the sampling fraction for the c-th categorywithin the i-th sample PSU in the h-th stratum, is theproduct of the probabilities of selection at every stage ineach sampling stratum:MONITORING THE SITUATION OF CHILDREN AND WOMEN 259