In a sequential game, the firm which is the first to enter a new market will certainly have a first mover advantage.

This seems to be a statement rather than a question. However, I can provide a response.

While it's often assumed that the first firm to enter a new market will have a first-mover advantage, this isn't always the case. The first-mover advantage refers to the competitive benefits that a company gains by being the first to enter a new market. These benefits can include brand recognition, customer loyalty, and the ability to set industry standards.

However, being the first mover also comes with risks. The firm may face high research and development costs, and there's also the risk that the market may not be ready for the product or service. Additionally, later entrants can learn from the mistakes of the first mover and enter the market with a more refined product or strategy.

So, while being the first to enter a new market can provide certain advantages, it doesn't guarantee success. Each situation needs to be evaluated individually, taking into account the specific market conditions, the firm's capabilities, and the potential risks and rewards.