Bilendi commissioned online survey (Germany, restricted access)

Bespoke confidential survey: not exercised here

This is an author-commissioned survey, fielded through the panel provider Bilendi. It is not an off-the-shelf product and not publicly downloadable: it carries no provenance badge because there is no standing access path we can run here. The individual-level responses belong to a specific research project and were collected under that arrangement. The page documents what the survey is and the gotchas; treat it as unverified. This is the honest grade under the institute’s Verified discipline.

The Bilendi survey is a one-off, author-commissioned online survey of German respondents, fielded through the survey-panel provider Bilendi. It collects individual-level responses on attitudes, stock-market participation, demographics, trust, and risk tolerance, designed to be representative of the target population. Because it is bespoke, the questionnaire and sample are defined by the research project rather than by a vendor catalog. A paper we distill uses it: Laudenbach, Malmendier & Niessen-Ruenzi use a 2023 Bilendi survey of 9,695 Germans (5,286 East, 4,409 West) on attitudes, stock-market participation, trust, and risk tolerance, alongside the online-broker and proprietary bank data.

• Cost: commissioned (the authors pay the panel provider to field it); not a resold product.
• Provider: Bilendi (the online-panel fieldwork); design by the authors.
• Coverage: the surveyed sample, weighted to be representative of the target German population; a single cross-section, not a panel.

Access (restricted)

• No off-the-shelf access. The survey is specific to the project; there is no catalog product to buy and no public file.
• Project-bound. The microdata belongs to the commissioning researchers under the fielding arrangement; obtaining the same data means commissioning a new survey, not licensing this one.

Gotchas (the ones that bite pipelines)

These are the failure modes to expect; they are documented, not verified here.

• Online panels are not random samples. Respondents are drawn from an opt-in panel and quota-balanced, not a probability sample; representativeness depends on the weights and quotas, and some groups are reached poorly. Use the weights and report them.
• Self-reported, single cross-section. Attitudes, participation, and risk tolerance are self-reported at one point in time; there is no panel dimension and no administrative check. Treat the measures as stated preferences.
• Recruitment and wording drive answers. Question order, framing, and the recruitment script shape responses; results are not comparable to a differently worded survey. Pin the instrument.
• Region splits rely on self-report or current location. East/West (or similar) splits depend on where respondents say they grew up or now live; misclassification is possible. Check how the split is defined.
• Not reproducible from a public source. Others cannot re-pull the same responses; replication means a new survey with the same instrument. Plan for that.

Citation

Cite the design and provider, e.g.: Author-commissioned online survey fielded by Bilendi, YYYY; individual responses used under the project arrangement. State the fielding year, the sample size and quotas, and the use of weights.