babylon.engine.dialectics.rent

RentDialectic — Ground Rent extraction (V3 Ch37-47).

Three-category decomposition: agricultural, resource, urban.

See also

babylon.economics.rent: Ground rent extraction calculations.

Classes

`RentDialectic`(**data)	Ground Rent extraction — Absolute ↔ Differential.
`RentPole`(**data)	Pole A for the Rent dialectic — three-category decomposition.

class babylon.engine.dialectics.rent.RentDialectic(**data)[source]

Bases: Dialectic[RentPole, EmptyPole]

Ground Rent extraction — Absolute ↔ Differential.

Pole A holds the three-category rent decomposition (agricultural, resource, urban) from economics.rent.types.

Weight semantics:: < 0: Rent is a minor claims category (small rentier share). > 0: Rent dominates surplus distribution (rentier economy).
Motion law:: Reads upstream total_surplus to compute rentier share. Weight = 2 * (rent_share) - 1, clamped to [-1, 1].

Parameters:

id (UUID)
type_tag (str)
pole_a (RentPole)
pole_b (EmptyPole)
weight (Annotated[float, Ge(ge=-1.0), Le(le=1.0)])
parent_id (UUID | None)
tick_created (int)
tick_updated (int)

type_tag: str

step(inputs, world)[source]

Motion law T for rent dynamics.

Parameters:

inputs (TickInputs) – Upstream outputs. Looks for total_surplus.
world (WorldView) – Read-only world context.

Return type:

RentDialectic

Returns:

New RentDialectic with updated weight.

observe()[source]

Project rent extraction state.

Return type:: dict[str, Any]
Returns:: Observation dict with rent categories and total.

invariants()[source]

Verify rent components are non-negative.

Return type:: list[str]
Returns:: List of violation descriptions.

model_config: ClassVar[ConfigDict] = {'frozen': True}: Configuration for the model, should be a dictionary conforming to [ConfigDict][pydantic.config.ConfigDict].

id: UUID

pole_a: A

pole_b: B

weight: float

parent_id: UUID | None

tick_created: int

tick_updated: int

class babylon.engine.dialectics.rent.RentPole(**data)[source]

Bases: BaseModel

Pole A for the Rent dialectic — three-category decomposition.

Reimplements the three-category rent aggregation from economics.rent.types.RentExtraction. The formula total_rent = agri + resource + urban is identical. This is intentional: the dialectic receives pre-aggregated county-level data and does not perform data-source lookups.