About the notebook

This is the opening post of the notebook, written alongside the other five seed essays, and serves as a tonal index for whoever arrives here for the first time.

At some point in 2024 I noticed I had two parallel practices that didn't speak to each other: scribble in private notebook and technical report in PDF. The private notebook was honest but not auditable, the technical report was auditable but lied by omission, hiding the hesitation, the discarded error, the hypothesis that didn't pan out.

The intent of the site is to make these two things converge.

Why open

Public research in hobby time has three advantages over closed report:

1. Errors are caught early. If I publish a wrong analysis, someone will correct me before it becomes the foundation of another analysis of mine. That is expensive in closed environment.
2. The final version comes out simpler. When you write in public, there is pressure to cut what is not essential. Closed reports accumulate appendix and qualification.
3. The work takes on its own life. An open study is citable, indexable, linkable. A private PDF dies in email.

None of this is original, it is the tradition of open notebook science applied to a different niche.

Why insist on method

There is a way to write about data that privileges narrative over provenance. "Brazil exports X billions in commodities", without citing source, without explaining aggregation, without qualifying caveat. That is the dominant mode of Brazilian economic journalism, and I don't write well in that register.

The alternative register is slower, more technical, more tedious. Always cite primary source. Declare extraction date. Show the formula. Warn the caveat. Almost no one reads. Those who do, read for decades.

What's here

The other five seed essays cover themes that recur often: why I published Panorama SUSEP instead of a closed report, the difference between data-argument and data-ornament, the cascading routine I apply before accepting non-trivial change, the treatment of errata as editorial infrastructure, and the thesis of hobby as long-term infrastructure. All were written alongside this one, with voice extracted from personal notes and revised at publication.

The expected cadence is low: long essays, rare, ideally one or two per month. No newsletter, no promo, no expectation of virality. Whoever wants to follow subscribes to the RSS. Whoever arrives via search finds the related articles via tag and cross-reference.

— Natan, Apr/2026