What are the key factors that contribute to the sustainability of a perfectly competitive market in the long run?

In a perfectly competitive market, key factors contributing to sustainability in the long run include:

1. Low barriers to entry and exit for firms, promoting competition and preventing monopolies.
2. Transparent information and price signals, allowing for efficient allocation of resources.
3. Rational consumer behavior, leading to stable demand and supply dynamics.
4. Absence of externalities or market distortions, ensuring fair competition and optimal market outcomes.