01Where else it exists
- Local presence(Marginal → Widespread)
- Exported from Brazil(Marginal → Widespread)
- Brazil
- Absent (checked)
- No data
Sovereign projection: Equal Earth centered on 60° W, south up, as on IBGE's world maps. Colonial projection: Equal Earth. Places with uncertain presence take the color of the highest possible level; the table shows the full range.
02What exactly is being measured
Staff member who controls access to residential buildings full time.
03Context
The job exists in few countries with the same frequency [1].
04How we got this number
- Presence abroad
Sum of each place's weight: widespread = 1, regional = 0.5, marginal = 0.1. Where it only exists as a Brazilian export, the weight is multiplied by 0.5.
- 3.1
- Exclusivity E
From 0 (exists everywhere) to 1 (only in Brazil), on a log scale.
- 0.69
- Intensity I
How much more common it is in Brazil than in the other places where it exists.
Present in most middle-class buildings in big cities (fictional data). [1]
- 2 of 4
- Rarity coefficient R
R = E + 0.5 × (I ÷ 4) × (1 − E)
R = 0.69 + 0.5 × (2 ÷ 4) × (1 − 0.69) = 0.77
- 0.77
- Jabuticaba Index®
- 77%
Not part of the score
How aware Brazilians are that this is rare abroad.
Rarely perceived as unusual. editorial judgment
1 of 4
Computed from source types: from A (official and academic data) to D (editorial judgment). It does not change the index.
A
05Sources
- [1]
A. Nonymous, P. Laceholder. A Global Survey of Allegedly Unique Things
University of Nowhere Press · Jun 2024 · Academic
example.org/fictional-survey · accessed Sep 25, 2026