MarkBankruptFirms

class bamengine.events.bankruptcy.MarkBankruptFirms

Bases: Event

Detect insolvent firms and remove them from the economy.

Firms are bankrupt if net_worth < 0 or production_prev = 0 (ghost firm rule). Bankrupt firms fire all workers and have all loans purged from LoanBook.

Note: We check production_prev (not production) because production is zeroed at the start of each period’s planning phase. production_prev holds the previous period’s actual production.

Examples

>>> import bamengine as be
>>> sim = be.Simulation.init(n_firms=100, seed=42)
>>> event = sim.get_event("mark_bankrupt_firms")
>>> event.execute(sim)
>>> sim.ec.n_firm_failures
2

See also

SpawnReplacementFirms

Creates replacements

bamengine.events._internal.bankruptcy.mark_bankrupt_firms

Implementation

execute(sim)

Execute the event’s logic.

Mutates simulation state in-place. This method must be implemented by all Event subclasses.

Parameters:

sim (Simulation) – The simulation instance containing all state and configuration.

Returns:

All mutations are in-place.

Return type:

None

Examples

Implement execute in a custom event:

>>> from bamengine import event, ops
>>>
>>> @event
... class CustomPricingEvent:
...     def execute(self, sim):
...         prod = sim.get_role("Producer")
...         # Apply 10% markup to all prices
...         new_prices = ops.multiply(prod.price, 1.1)
...         ops.assign(prod.price, new_prices)

Access configuration and RNG:

>>> @event
... class StochasticEvent:
...     def execute(self, sim):
...         shock = sim.config.h_rho
...         random_values = sim.rng.uniform(0, shock, size=sim.n_firms)
...         # Use random_values in calculations

Notes

The execute method receives full Simulation access, including: - All roles: sim.get_role(“RoleName”) or sim.prod, sim.wrk, etc. - Configuration: sim.config - RNG: sim.rng - Economy state: sim.ec

__init__()

name = 'mark_bankrupt_firms'