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Integrating Representative Sample and High Net Worth Survey Data on Giving. René Bekkers Center for Philanthropic Studies VU University Amsterdam. The Representative Sample. Since 2002 we biennially collect data on giving in the Giving in the Netherlands Panel Survey .
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IntegratingRepresentative Sample and High Net WorthSurvey Data onGiving René Bekkers Center forPhilanthropic Studies VU University Amsterdam
The Representative Sample • Since 2002 we bienniallycollect data ongiving in the Giving in the Netherlands Panel Survey. • We startedwith a sample of 1707 individualsthat are representativefor the Dutch populationonkeydemographics. • We have justcompleted the sixth wave, GINPS12.
PreviousSupplements • Protestant Christians: anoversample (n=257) was included in GINPS02 to study high levels of givingamong Protestants. • Ethnicminoritycitizens: constitutinganincreasingproportion of the population. • Surveysamong the 4 major minoritygroups (Turks, Moroccans, Surinamese, Antillians, each n=150) have been fieldedsince 2008.
Properlycounting in • Weights have been createdfor Protestant and ethnicminorityoversamplesusingpopulationvaluesfromStatisticsNetherlands. • Religion, education: surveybased • Ethnicity, age, gender, region, home ownership: population register data
We maystill miss something • Ifgiving in the Netherlands is similar to othercountries, the wealthy are responsiblefor a largeproportion of totalgiving. • But in GINPS surveys we typicallyencounter ≈10% withincomefromwealth. • And < 1% withincome > € 1,000,000. • The low n at the high end willmakeestimatesunreliable and sensitive to outliers.
Household income > €100k x 1,000
That is why… • We decided to conduct a surveyamongwealthyindividuals. • We workwith a the ‘Millionaire Database’ of Elite Research, containingaddresses of 120,000 wealthyindividuals (thanks Jos!). • The privatelyowned database was constructedfrom public records from the chamber of commerce, the residentialproperty register, and realtor websites.
Response rates • A pilot paper & pencil questionnaire mailed to a target sample of 500 randomlyselectedaddresses: 18.8% (31 online). • The GINPS 2010 HNW Studymailed to a random sample of 10,000 addressesyielded a response rate of 13.4% (358 online). • One reminder was sent aftertwo weeks to all non respondinghouseholds.
The HNW 2012 Survey • Supplement to GINPS12 • Replication and refinement of HNW 2010 survey • Again, target sample n = 10,000 • 13.6% response rate (after reminder) • 948 paper and pencil (PAPI) • 413 online (CAWI)
Weights • Thisyear we askedquestionsaboutwealth, home equity, and income (salary, business) thatcanbecompared to taxincome data. • ThisallowsStatisticsNetherlands to createweightsforwealth and incomebasedonincometax returns. • These weightscanbeused to integrate the HNW data with the representative sample.
Warning • Givingestimatesfrom the HNW2012 Survey are preliminary. • The raw data includeseveralstrongoutliers. • These outliers are excludedfrom the analyses presentedhere. • Amountsdonated are conservativeestimates.
Contact René Bekkers Center for Philanthropic Studies VU University Amsterdam r.bekkers@vu.nl http://www.giving.nlorhttp://www.geveninnederland.nl Twitter: @renebekkers Blog: http://renebekkers.wordpress.com/