Frame 01
BLS Contingent Worker Supplement: exposure frames beside the main job record
What the CWS asks about contingent and alternative work, and where secondary earnings can sit outside the primary catalog slots.
Proof Strip
Independent notes that review how published research files secondary earnings and platform work—frame by frame, like a darkroom contact sheet
A contact-sheet style index for method: named sources, visible coverage limits, and no assumption about any reader’s circumstances.
Strip proof · Sep 2026
On this strip
Three exposure frames
Notes review published instruments and papers on secondary jobs, platform-mediated work and how household surveys list those flows—not income playbooks.
Household surveys, administrative records and international measurement guidance are compared with methodological critique in the same text.
Proof Strip does not publish testimonials, reviews or outcome stories. The index describes how others measure; it does not prescribe conduct or forecast effects.
Catalog
Recent frames
Frame 02
Katz and Krueger on alternative arrangements: exposing definitions before counting rows
How a widely cited paper defines alternative work arrangements and what those definitions do—and do not—cover about secondary earnings.
Frame 03
OECD platform measurement: density checks before a count enters the frame
How international measurement pilots define platform-mediated work before it enters employment or income statistics.
Standards
Editorial criteria
- No presupposition about the reader. Proof Strip does not claim or imply knowledge of any visitor’s personal, labor or financial situation.
- Named source or no claim. Every figure or pattern is attributed to an identifiable study or instrument. Contested evidence is marked as contested in the same paragraph.
- Method critique on the page. Each note states sample, definition or coverage limits; findings are not presented as universal conclusions.
- No outcome framing. Content is not described as a system, protocol or sequence that produces income, employment or a change of condition.
Boundaries
What Proof Strip is not
- Not therapy, career coaching or professional counseling.
- Not a diagnosis, treatment or personalized assessment of anyone’s earnings.
- Not individualized guidance on tax, labor law or platform accounts.
- Not a promise of results, income change or employment outcomes.
- Not a crisis or emergency service.
- Not intended for readers under 18.
FAQ
Common questions
Does Proof Strip tell people how to earn more?
No. The desk publishes notes on how research and surveys measure secondary earnings and related constructs. It does not publish earnings instructions.
Is access free?
Editorial pages on this site are available without a purchase. If a separate product is offered elsewhere, refund terms for that product are stated on the refund page.
What is the refund window for a paid product?
When a paid product is sold, refund requests may be submitted within 30 days under the conditions on the refund page.
Does Proof Strip offer consultations?
No. There is no individualized counseling, coaching or case review.
Are testimonials published?
No. Proof Strip does not publish testimonials, reviews or success stories.
How are contact details handled?
Email sent to [email protected] is used to reply to the request. The privacy page describes retention and rights under LGPD and GDPR framing.
Support
Editorial desk contact
Questions about sources, corrections or access: [email protected]. Proof Strip operates from Brazil with email-only support and no public walk-in address.