问一道题：NO.PZ2016010801000090

问题如下：

In order to stimulate the domestic consumption on goods and services, the policymaker decides to lower the tax rate and increase government spending. It is expected that the economy will take half a year to act on the policy change. Which of the following is most likely correct?

选项：

The fiscal policy is discretionary and the time of half a year is called law-making lag.

The fiscal policy is automatic and the time of half a year is called recognition lag.

The fiscal policy is discretionary and the time of half a year is called impact lag.

解释：

C is correct.

The fiscal policy implemented by tax and government spending change is called discretionary fiscal policy. The time between implementing the policy and economic changes is called impact lag.

考点：财政政策

解析：

题目中说到政府为了刺激经济，有意识地减少税收并且增加政府支出，这样的财政政策被称为自由裁量财政政策。

并且政策实施和经济变化之间会有一定的时间间隔，这被称为影响滞后。所以C选项正确。