# Schema: PopulationTier

**Entity Type:** `PopulationTier`

## Fields

| Field | Type | Notes |
|------|------|------|
| id | string | stable anchor id |
| name | string | tier name (e.g., Liberti, Plebeians) |
| region | string | Latium / Albion |
| workforceFraction | number | percentage of population providing labor (0.0-1.0) |
| needsCategories | array | Food, Public Service, Fashion, etc. |
| notes | string | general guidance |
| commonPitfalls | string | common mistakes |