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\begin_body

\begin_layout Subsection
开放经济的收入决定
\end_layout

\begin_layout Standard
基本逻辑
\end_layout

\begin_layout Standard
国民收入恒等式为
\begin_inset Formula \[
Y=C+I+G+X-M\]

\end_inset


\end_layout

\begin_layout Standard
消费函数为
\begin_inset Formula \[
C=C_{0}+bY\]

\end_inset


\begin_inset Marginal
status open

\begin_layout Standard
\begin_inset Formula \[
b=\Delta C/\Delta Y\]

\end_inset


\end_layout

\end_inset


\end_layout

\begin_layout Standard
进口函数为
\begin_inset Formula \[
M=M_{0}+mY\]

\end_inset


\begin_inset Marginal
status open

\begin_layout Standard
其中
\begin_inset Formula $M_{0}$
\end_inset

是自发进口，
\begin_inset Formula $mY$
\end_inset

是诱发进口
\end_layout

\end_inset

 
\end_layout

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