sov-strat-game

This is the first release: a toy game with one strategic dependency.
An EU firm depends on a US tech supplier who passes tariff costs through 100% (pricing power). Exit takes 3 years and is expensive. Tariffs may be imposed, removed, re-imposed unpredictably as trade wars evolve.
The model optimizes migration policy (wait/hedge/accelerate/exit) under two layers of uncertainty:

• Risk: Tariff regime switches (Markov dynamics)
• Ambiguity: Unknown transition probabilities (Wasserstein ball around forecast)

This captures both random political shocks and forecast errors about their persistence.