The sampling is probabilistic and stratified. The sampling consists of two stages, the primary sampling unit being the block, which is defined as the urban geographic area delimited by roads. The secondary sampling unit is the dwelling with at least one Venezuelan person that exists within a block. For the households that are finally selected, information is obtained from all the individuals.
The sampling frame for the blocks was constructed as follows:
i) The addresses of 58,067 Venezuelan people registered in the 2017 Population and Housing Census were identified.
ii) The addresses of 10,076 people were available registered in the registry of Venezuelans who applied for the Temporary Permit of Permanence from the National Superintendency of Migration of the Ministry of the Interior.
iii) The blocks containing the addresses of the aforementioned information sources were identified using the Geographic Information System. A global framework of 19,074 blocks was built.
The concept of block used in the survey is a physical area delimited by streets, avenues, roads, canals, etc. easily identifiable and can contain one or more homes, parks, vacant lots, sports fields, etc.
The original design of the sample included the construction of three strata based on the number of dwellings with a Venezuelan population found in each block of the sampling frame: 1 to 5, 6 to 10, greater than 10. On the other hand, the population of the city of Lima was divided into 4 zones with the following districts:
North Lima: Los Olivos, San Martn De Porres, Comas, Carabayllo, Independencia, Puente Piedra
East Lima: San Juan De Lurigancho, Ate, Santa Anita, El Agustino, San Luis, La Molina, Lurigancho
Downtown Lima: La Victoria, Lima, Santiago De Surco, Surquillo, San Miguel, Brea, Barranco, Rmac, Lince
Jesus Maria, Magdalena Del Mar, San Borja
South Lima: Chorrillos, San Juan De Miraflores, Villa El Salvador, Villa Mara Del Triunfo, Lurn, Pachacamac
The housing framework was built by means of an exhaustive registry of buildings and dwellings in each of the selected blocks, identifying those places, be they dwellings or establishments, that had a population from Venezuela. The concept of housing for the purposes of the survey included private and collective dwellings (hotels, hostels, lodgings, churches and shelters), where the Venezuelan population is found. This concept is different from the one used in the regular INEI household surveys, which only considers private households with a maximum of 5 households. The concept of the household used was: People, whether or not they are related, who share the main meals and attend to their vital needs in common. This concept is different from that used in the INEI household surveys, where the budget is considered.
