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Fiscal Geometry is an institutional analysis framework for observing how fiscal rules shape system-level outcomes through rule-triggered fiscal events mapped in a two-axis fiscal space (jurisdictional shift × intergenerational capacity).
Spatial patterns—such as clustering, redirection, and constraint—indicate structural tension in institutional design, describing system behavior under rule interaction rather than individual decisions or social narratives.
It is a descriptive mapping layer and does not function as prediction, ranking, or policy prescription.
An Upstream Analytical Interface
Fiscal Geometry operates as a neutral interface that standardizes fragmented institutional inputs into a shared structural space. Interpretation remains downstream; visibility comes first.
The interface does not evaluate or prescribe. It renders structural visibility first, allowing patterns such as clustering and bottlenecks to be observed downstream.
ITI / IDI (Core Definition — Same Dataset)
ITI is computed from the same interaction records in two readings.
Arithmetic ITI = scalar aggregation of the records.
Geometric ITI = XY rendering of the same records; computed only on the dominant cloud.
IDI = the controlled difference between Arithmetic ITI and the cloud-projected Geometric ITI.
The Index Family
ITI (Institutional Tension Index): an arithmetic reading of expected tension from formal rules, budgets, or planned structures.
gITI (Geometric ITI): a geometric reading of realized tension from observed shapes, densities, and clustering in outcomes.
IDI (Institutional Distortion Index): the absolute gap between ITI (intent) and gITI (realization), making misalignment visible as a structural integrity-gap.
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