Supplementary questionnaire on the 2011 Population and Housing Census SWITZERLAND

Supplementary questionnaire on the 2011 Population and Housing Census SWITZERLAND

Supplementary questionnaire on the 2011 Population and Housing Census Fields marked with are mandatory. INTRODUCTION As agreed during the last meeting of the "Working Group on Population and Housing Censuses" (4-5 June 2013), the transmition of the metadata on the 2011 census is split in two flows. In addition to the metadata provided using the ESS-MH (ESS Metadata Handler), Member States are asked to provide the set of additional information included in this questionnaire. The reason why these questions were not included in the ESS-MH is that they do not naturally fit into the ESMS (Euro-SDMX Metadata Structure), i.e. the standard structure for metadata transmission in the ESS. 0. Contact information Please insert the contact details of the person filling in this questionnaire Name / Surname E-mail 1. Usage of estimation methods According to Annex II to Reg. (EU) No 519/2010, Member States shall report, for each census topic, on the methodology used to estimate data for that topic. For convenience, this question is applicable only to those topics for which estimation methods were used. 1.1. Were estimation methods used to estimate any topic in 2011 census? Yes No

If "Yes", please indicate for which topics estimation methods were used and provide a short description of the estimation methodology Place of birth: imputations for records with unknown place of birth, imputations were used to distinguish between "born in Switzerland -> but with unknown commune" and "born outside Switzerland - > in an unknown country" 2. Usage of register-based data sources for the 2011 census This section of the questionnaire applies only to those Member States that used register-based data sources to produce the 2011 census data (possibly in combination with other data sources). Provisions concerning this part of the questionnaire are contained in Annexes I and II of Reg. (EU) No 1151/2010.

2.1. Which register-based data sources were used for which topics? (Please tick the appropriate boxes) Source / Topic Population register Social security/tax register(s) Employment/ occupation/ unemployment register(s) Education register(s) Business register(s) Building/ dwelling/ housing register(s) Other administrative register(s) Sex Age Current Activity Status Place of work Size of the locality Marital status Occupation Status in employment Educational attainment Place of birth

Country of citizenship Year of the arrival in the country Residence one year before Household status Family status Housing arrangements

2.2. Are there known problems of specific population sub-groups likely to be over or under covered by the registers? Yes No 2.3. Are there known reasons for people delaying registration/deregistration? Yes No 2.4. Has the extent of any problems in the completeness and timeliness of registration/deregistration been evaluated? Yes No 2.5. Were individual records matched across different registers? Yes No If "Yes", which identifying variables were used for matching data records? Social security number (unique personal identification) 3. Usage of sample surveys for the 2011 census According to item 2.2.2. of Annex II of Reg. (EU) 1151/2010 some additional metadata are requested in case that Member States use sample surveys to derive part of the data of the 2011 census.

3.1. For which topics in the 2011 census were sample surveys used to collect statistical information? Topic Sex Age Current activity status Place of work Marital status Occupation Industry Status in employment Educational attainment Place of birth Country of citizenship Year of arrival in the country Residence one year before Household status Family status Housing arrangements

3.2. Please provide a short description of the sampling design used in these survey-based data sources Written sample survey of approx. 300,000 persons. The sample is drawn from the population registers. The survey covers people living in private households who are aged 15 or over (persons with diplomatic status are excluded). The respondents provide information about themselves and their households. The persons are sampled with equal probability. For the final selection, the probability is 3.7% in a canton that does not double its sample size and 7.5% in a canton or a municipality that doubles the sample size. 3.3. Please provide an assesment of possible biases in the estimation due to model assumption errors For the Swiss Structural Survey (sample), possible bias risks due to model assumptions come from: - Total non-response correction. Total unit non-response has been accounted for using reweighting techniques, namely a rough modelization of non-response as being a Bernoulli second phase selection within administrative regions followed by calibration on various demographic totals (sexe, age, nationality, ) available in the population registers. These characteristics may not be fully sufficient to explain the non-response and this could lead to biased estimations. - Difference between sampling frame and reference population. The sample for the structural survey is selected from a frame that is based on different population registers that are dated from the end of September, while the actual survey starts in early January and the reference population is that which is found in population registers on December 31st. The unstated underlying model assumption is that, within non-response treatment classes defined by administrative regions and calibration variables, people who left the target population between end of September and end of December have the same characteristics as people who entered the reference population in the same time. - A further possible bias source has to be considered for household level estimations : a sizeable discrepancy is observed between household compositions as listed in the structural survey and in the population registers. It could possibly result from a misunderstanding by respondants of the household definition as given on the survey form, but also and perhaps more frequently from a partial unit non-response whereby a respondent does not give a complete enumeration and characteristics of the members of his household. Households concerned by this problem were removed from the household sample and treated as total non-response. This non-response was then modelized as a Bernoulli sampling phase within administrative regions and household sizes. Final extrapolation weights are obtained after calibration on demographic totals. This treatment could result in biases if the discrepancy between survey households and register households is not sufficiently explained by re-weighting and calibration variables. The problem may be especially acute for families that have a young adult child or other situations where one person may feel that its principal residence is somewhere while its administrative registration is somewhere else.

3.4. Please provide a short description of the algorithm used to calculate the standard error The standard error is computed with the surveyfreq procedure of SAS. The stratification and the calibrated units are considered. 4. Assessment of the data sources used for the 2011 census According to item 2.4 of Annex I to Reg. (EU) 1151/2010, Member States shall report upon the extent to which the data sources used for the 2011 census meet the "essential features" as listed in Art. 4(4) of Reg. (EC) 763/2008 and defined in Article 2(2-6) of Reg. (EU) 1151/2010. 4.1. To what extent do the data sources used for the 2011 census meet the "essential feature" of: A - Individual enumeration? Completely To a large extent Partially Poorly Not at all B - Simultaneity? Completely To a large extent Partially Poorly Not at all

C - Universality within the defined territory? Completely To a large extent Partially Poorly Not at all D - Availability of small-area data? Completely To a large extent Partially Poorly Not at all Please provide a short explanation of why the essential feature of "availability of small-area data" is not met by the data sources used for the 2011 census: Results from the (annual) sample survey only allow statistical analyses for the cantons or for groups of at least 15,000 people. E - Defined periodicity? Completely To a large extent Partially Poorly Not at all 5. Transmition of data concerning primary and secondary homeless persons

According to Reg. (EU) 519/2010 "data on the total population shall include the number of all primary homeless persons (persons living in the streets without shelter) and secondary homeless persons (persons moving frequently between temporary accommodation). However, Member States are free not to include the number of homeless persons in their data on the total population, or to include the number on the homeless but not to break the data on the homeless down by any breakdown or category (figure included only in the total and/or categorised under Not stated ). If Member States do not include the number of homeless persons in their data on the total population, they shall provide the Commission with the best available estimate for the number of all primary and the number of all secondary homeless persons in the whole Member State." This part of the questionnaire is designed to respond to these requirements and, for sake of clarity, reporting on primary and secondary homelessness is split into two separate sections. 5A) Primary homeless persons 5A.1. Which of the following sentences describes best the level of inclusion of primary homeless persons in the data transmitted for the 2011 census? Census data include primary homeless persons with detailed information for all census topics Census data include primary homeless persons with detailed information only for limited set of census topics Census data include primary homeless persons with no detailed information on any census topic Census data do not include primary homeless persons In case that census data do not include primary homeless persons, please provide the best available estimate of the number of primary homeless persons resident in the territory of your Member State Unknown

5A.2. Please provide a short description of the methodology used to estimate the number of primary homeless persons in your Member State None 5B) Secondary homeless persons 5B.1. Which of the following sentences describes best the level of inclusion of secondary homeless persons in the data transmitted for the 2011 census? Census data include secondary homeless persons with detailed information for all census topics Census data include secondary homeless persons with detailed information only for limited set of census topics Census data include secondary homeless persons with no detailed information on any census topic Census data do not include secondary homeless persons In case that census data do not include secondary homeless persons, please provide the best available estimate of the number of secondary homeless persons resident in the territory of your Member State Unknown

5B.2. Please provide a short description of the methodology used to estimate the number of secondary homeless persons in your Member State None THANK YOU FOR YOUR PARTICIPATION!