shorten these sentence in one sentence We plan to utilize the CEO death event and terrorist attack event as plausibly exogenous shocks and adopt the difference-in-differences DID estimation approach T

Our research will use publicly listed firms in the US and the difference-in-differences estimation approach to analyze the effects of CEO death and terrorist attack events, which serve as examples of internal and external disruptions that would cause uncertainty for firms, and data will be collected from various relevant sources.