NO.PZ2023010401000165
问题如下：
A country that wishes to narrow its trade deficit devalues its currency. If domestic demand for imports is perfectly price-inelastic, whether devaluing the currency will result in a narrower trade deficit is least likely to depend on:
选项：
A.the size of the currency devaluation.
B.the country's ratio of imports to exports.
C.price elasticity of demand for the country's exports.
解释：
With perfectly inelastic demand for imports, currency devaluation of any size will increase total expenditures on imports (same quantity at higher prices in the home currency). The trade deficit will narrow only if the increase in export revenues is larger than the increase in import spending. To satisfy the Marshall-Lerner condition when import demand elasticity is zero, export demand elasticity must be larger than the ratio of imports to exports in the country's international trade.
中文解析：
在进口需求完全无弹性的情况下，任何规模的货币贬值都会增加进口总支出(同样数量的商品，以本国货币计价的价格更高)。只有出口收入的增长大于进口支出的增长，贸易逆差才会缩小。为了满足进口需求弹性为零时的马歇尔-勒纳条件，出口需求弹性必须大于该国在国际贸易中的进出口比率。
这题考察的是哪个知识点？
