之前看csdn上的大佬说修改r包的安装路径，原文是这么说的： 使用install.packages ()命令进行安装，默认情况下首先从 cran.rstudio.com 网站上下载二进制安装包文件到windows系统c盘下. Money supply = currency + demand deposit, or m = c + d， monetary base=currency + reserve，or b=c+r monetary base（b，基础货币）是受中央银行控制. 推算过程如下： m=c+d：货币供给是通货与活期存款 b=c+r：基础货币是通货与银行准备金之和。 用第一式除以第二式：m/b= (c+d)/ (c+r) 右边分子和分母除以d：m/b=.
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