CA = Sp – I + (T – G – R)这个公式在课件哪里呀？

问题如下：

A country implements policies that are expected to increase taxes by €100 million, increase government spending by €50 million, and reduce investments and private sector savings by €25 million each. As a result, the country’s current account balance is most likely to:

选项：

A.decrease by €50 million. B.increase by €100 million. C.increase by €50 million.

解释：

CA = Sp – I + (T – G – R)
Where
CA = current account balance
Sp = private sector savings
I = investments
T = taxes
g = government spending
r = transfers
ΔCA = –25 – (–25) + (100 – 50 – 0) = 50
A is incorrect. It uses the wrong sign before the parenthesis for government sector:
ΔCA = –25 – (–25) – (100 – 50 – 0) = –50.
B is incorrect. It uses the wrong sign on savings: ΔCA = 25 – (–25) + (100 – 50 – 0) = 100.

中文解析：

CA = Sp - I + (T - G - R)
其中
CA =经常账户余额
Sp =私人部门储蓄
I =投资
T =税
政府开支
R =转移
Δca = - 25 - (- 25) + (100 - 50 - 0) = 50
A不正确。它在政府部门的括号前使用了错误的符号:
Δca = - 25 -(- 25) -(100 - 50 - 0) = - 50。
B不正确。它使用了错误的储蓄符号:ΔCA = 25 -(- 25) +(100 - 50 - 0) = 100。