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PREÅ¢URI - Institutul National de Statistica

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sunt înregistrate pe baza informaţiilor primite <strong>de</strong> launităţile care le practică.iii) Eşantionul <strong>de</strong> mărfuri şi servicii - cuprin<strong>de</strong>sortimente care au o pon<strong>de</strong>re semnificativă înconsumul populaţiei. Nomenclatorul utilizat estestructurat pe 3 nivele <strong>de</strong> agregare: grupe, posturi şisortimente astfel:- grupa mărfurilor alimentare cuprin<strong>de</strong> 54 posturi cu395 sortimente;- grupa mărfurilor nealimentare cuprin<strong>de</strong> 111 posturicu 977 sortimente;- grupa serviciilor cuprin<strong>de</strong> 49 posturi cu 448sortimente.Sortimentele se individualizează în teren prin varietăţi<strong>de</strong> mărfuri şi servicii.2. Informaţiile colectate prin această cercetare suntcompletate cu cele provenite din cercetarea privindpreţurile principalelor produse agricole vândute<strong>de</strong> producătorii particulari pe pieţeleagroalimentare, asigurându-se astfel acoperireaprincipalelor surse <strong>de</strong> aprovizionare a populaţiei.Sistemul <strong>de</strong> pon<strong>de</strong>rarePon<strong>de</strong>rile utilizate pentru calculul indicilor preţurilor<strong>de</strong> consum sunt obţinute din Ancheta Bugetelor <strong>de</strong>Familie (ABF) şi rezultă din structura cheltuielilormedii lunare efectuate <strong>de</strong> o gospodărie pentrucumpărarea bunurilor şi pentru plata serviciilornecesare satisfacerii nevoilor <strong>de</strong> trai. Periodic seanalizează structura cheltuielilor efectuate <strong>de</strong>populaţie, iar când mutaţiile intervenite suntsemnificative, pon<strong>de</strong>rile se actualizează. Astfel,începând din ianuarie 2012 în calculul IPC seutilizează pon<strong>de</strong>rile rezultate din structura cheltuielilormedii efectuate <strong>de</strong> o gospodărie în anul 2010.Metoda <strong>de</strong> calcul a IPCIPC se calculează ca un indice <strong>de</strong> tip Laspeyres cubază fixă. Începând din ianuarie 2012, calcululindicilor lunari cu bază fixă se va face cu preţurilemedii din anul 2010 (anul 2010=100) şi pon<strong>de</strong>riledin acelaşi an <strong>de</strong>terminate pe baza cheltuielilormedii din Ancheta Bugetelor <strong>de</strong> Familie.Pentru asigurarea continuităţii seriilor <strong>de</strong> indiciconstruiţi cu baze diferite s-a utilizat un „coeficient <strong>de</strong>racordare“ care permite legarea (racordarea) seriei<strong>de</strong> indici lunari din anul 2012 cu bază 2010=100 laseria <strong>de</strong> indici cu bază 2009=100. Coeficientul <strong>de</strong>racordare s-a <strong>de</strong>terminat ca raport între un indice <strong>de</strong>registered based on the information received from theunits setting them.iii) Sample of goods and services - inclu<strong>de</strong>s items thathave an important weight in the populationconsumption. The nomenclature used is divi<strong>de</strong>d into 3aggregation levels: groups, positions and items asfollows:- the group of food goods contains 54 positions with395 items;- the group of non-food goods contains 111 positionswith 977 items;- the group of services contains 49 positions with448 items.The items are individualized in the field by varieties ofgoods and services.2. To the information collected through this survey isad<strong>de</strong>d the information resulting from the survey onthe prices for the main agricultural productssold by private producers on agro-food markets,thus covering the main supply sources of thepopulation.Weighting systemThe weights used to calculate the consumer priceindices are obtained from the Household BudgetSurvey (HBS) and result from the structure ofmonthly average expenditure of a household for thepurchase of goods and the payment of servicesnecessary for meeting the living needs. The structureof population expenditure is periodically analysed;when changes are significant, weights are updated.Thus, beginning with January 2012, the CPI iscalculated using the weights resulted from thestructure of a household average expenditure in 2010.CPI computation methodThe CPI is calculated as a Laspeyres-type in<strong>de</strong>xwith a fixed base. Beginning with January 2012, themonthly indices with fixed base are calculated usingthe average prices of 2010 (2010 = 100) and theweights of the same year resulting from the averageexpenditure i<strong>de</strong>ntified by the Household BudgetSurvey.With a view to ensuring the continuity in the indicesseries built up with different bases, a “junctioncoefficient” was used, enabling the linking (junction) ofthe 2012 series of monthly indices (2010 = 100) to theindices series with the base 2009 = 100. The junctioncoefficient was calculated as a ratio between a6

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