网络数据在官方统计中的新用途.pdf

1、New Use-cases of web data for official statisticsWeb intelligence Network ConferenceFrom Web to Data4 Feb 2025,GdanskWIN work package 3 on new use cases Exploration of new web data sources for the production of official statistics,as primary or auxiliary datasource 6 use cases(UCs):PL,BG,DE-HSL/BBB,

2、FI,FRDE-HSL,DE-BBB,SEPL,BGNL,AT,DE-HSL,SE,FISE,UKSE,BGChallengesDeduplicationSearch-engine leakageChanged privacy concernsLack of dataML modelsFind the right urls/textsMissing dataWeighting issuesLack of standardisation among sitesAPI legalsDuplicate offersCoverageStabilityHedonic pricesUC1:characte

3、ristics of the real estate market(1)Aim:to monitor the real estate market that responds quickly to the economic cycles and is not fully covered by administrative dataPotential use:Flash estimates In-depth research,hedonic indices,modeling real estate characteristicsLandscaping phase:Each candidate p

4、ortal was assessed using a standardised checklist forassessment of data sources Consistent indicatorsacross countries:010000200003000040000500006000070000800002019M012019M042019M072019M102020M012020M042020M072020M102021M012021M042021M072021M102022M012022M042022M072022M102023M012023M042023M072023M102

5、024M012024M042024M07housesapartmentsFigure 30.Number of offers for sale on Oikotie 2019M01 to 2024M08Some sources had good coverage and were stable over time.Yearly cycles in real estate sales market are visible(less offers in winter holiday seasons).The COVID pandemic in 2020 to 2021 decreased the

6、numbers of sale offers considerably and the pre-pandemic levels were reached again in 2023Monitor trendsUC1:characteristics of the real estate market(2)-Countries have shown high stability level of web data and good level of reflecting the current market situation in real estate-The data that have b