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Description of methods and sources for Albania - INSTAT

Description of methods and sources for Albania - INSTAT

Description of methods and sources for Albania - INSTAT

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IPA 2009 Multi-beneficiary StatisticalCooperation ProgrammeMethod used to impute <strong>for</strong> missing dataImputation is done to cover the non-response <strong>of</strong> large enterprises. It is based on three<strong>methods</strong>: historical trend imputation <strong>for</strong> units with data from previous quarters; colddeck with use <strong>of</strong> the previous year, administrative data <strong>for</strong> units <strong>for</strong> which we havedata from administrative <strong>sources</strong>; mean value imputation <strong>for</strong> the rest <strong>of</strong> the responselarge units.Variable used <strong>for</strong> grossing-up to the populationThe weights are different <strong>for</strong> the turnover, production, value added index <strong>and</strong>domestic <strong>and</strong> non domestic turnover. The weights <strong>for</strong> the turnover index are based onthe turnover from the SBS statistics <strong>for</strong> the reference year 2005. The weights <strong>for</strong> theproduction <strong>and</strong> value added index are based on value added from the SBS statistics<strong>for</strong> the reference year 2005. The weights <strong>for</strong> the domestic <strong>and</strong> export turnover arebased on the data from the STS statistics <strong>for</strong> the reference year 2007.Main variables collectedThe following variables are covered each quarter:- turnover on domestic market;- labor costs;- number <strong>of</strong> employeesRetail trade survey: Methodological explanationsIndices on Retail trade <strong>and</strong> Sale <strong>and</strong> Repair <strong>of</strong> Motor vehicles from first quarter 2008are calculated with 2005=100 as a base year. Weights are calculated on the basis <strong>of</strong>Retail trade <strong>and</strong> Sale <strong>and</strong> Repair <strong>of</strong> Motor Vehicles survey in 2005, conducted by<strong>INSTAT</strong>.The turnover is estimated on CPA (Classification <strong>of</strong> Products by Activity)classification level. The main groups are in accordance with the main groups used inthe Consumers’ Price Index.Main activities included in the survey are:• Retail trade activity, group 52-NACE-Rev 1 (excluding 52.6 <strong>and</strong> 52.7)• Sale <strong>and</strong> repair <strong>of</strong> motor vehicles, group 50 NACE Rev 1.Sample: The enterprises with 5 <strong>and</strong> more employed are exhaustive whereas theenterprises with 1 - 4 employed are surveyed by sample survey.Data collection: the data is directly collected to the enterprises; in a face to faceinterview, by the interviewer.The response rate was 94.4 %.200/236

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