Source: https://guthlabs.ai/docs/instruments/unemployment-labor-force-rate-calculator/implementation/

instrument implementation / implementation-contract

# Unemployment & Labor Force Rate Calculator implementation

A source-bound implementation contract for Unemployment & Labor Force Rate Calculator; deployment and executable qualification remain separate.

Status: **VERIFIED_CLEAN**Lifecycle: **implementation-contract**

## Binding contract

This record describes what an executable surface must bind and validate. It does not claim that a public calculator, package, or production route is deployed.

**Record owner**: Guth Instruments

**Lifecycle**: verified-clean

**Evidence ID**: t5-184

**Effect**: Computation or source lookup only

## Input and validation requirements

A zero labor force produces unemployment_rate = 0/0, which is undefined and must be rejected or handled as an error. Inputs with labor force greater than the working-age population also produce mathematically defined but economically invalid percentages unless validation rejects them.

## Required corrections

No binding erratum is attached to this unique-name record. Implementers must still preserve the declared units, domain, and failure behavior.

## Inspectable interface fixture

The sample below is evidence for interface and validation tests, not a production implementation.

````
{
  "inputs": {
    "employed": 1500,
    "unemployed": 100,
    "working_age_population": 3000
  },
  "expected_outputs": {
    "unemployment_percent": 6.25,
    "participation_percent": 53.3333333333
  },
  "working": "labor_force = employed + unemployed = 1500 + 100 = 1600; unemployment rate = unemployed / labor_force = 100 / 1600 = 0.0625; unemployment percent = 0.0625 × 100 = 6.25%; participation rate = labor_force / working_age_population = 1600 / 3000 = 0.5333333333; participation percent = 0.5333333333 × 100 = 53.3333333333%."
}
````

## Other records

[01**Overview**](<https://guthlabs.ai/docs/instruments/unemployment-labor-force-rate-calculator/>)[02**Mechanism**](<https://guthlabs.ai/docs/instruments/unemployment-labor-force-rate-calculator/mechanism/>)[04**Qualification**](<https://guthlabs.ai/docs/instruments/unemployment-labor-force-rate-calculator/qualification/>)

## Sources and evidence

These pointers bind the page to evidence. They do not grant authority or collapse verification into deployment.

- `VERIFIED_LEDGER.json`

- `evidence-tranche5/tranche5-results.json`