“经济影响”常见的英文表达是 "economic impact" 。
例句:
The new policy is expected to have a significant economic impact on the region.(预计新政策会对该地区产生重大的经济影响。)
We need to assess the economic impact of this project before making a decision.(在做决定之前,我们需要评估这个项目的经济影响。)