考虑在大国开放经济中，政府想提高产量而又不改变利率。政府为什么要这样做？你会建议采取哪种政策

组合？这种政策对汇率和贸易余额会有什么影响？ Consider a large open economy in which the govemment desires to increase output without chartgins the interest rate．Why would the government want to do this？What type of policy mix would you recommend？What are the effects of this policy on the exchange rate and the trade balance？