各项冗余资源的计算：
1) recoverable slack, measured by the ratio ofselling, general and administrative expenses to sales; 2) available slack,measured by the ratio of current assets to current liabilities;
3)potential slack, measured by the ratio of total equity to total debt.


综合指标的计算：
I standardized these three proxies and summed them up to obtain a general slack index following Chen, 2008.


原数据+计算结果中，包含冗余资源net的所有数据。如果大家只需要计算结果，可以只下载net；如果想要查看原数据和命令，可以下载原数据+stata命令。没有必要重复下载哈。

chen2008 Determinants of firms' backward- and forward-looking R&D search .pdf
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03-18 冗余资源 net.xlsx
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03-18 冗余资源 原始数据及计算结果.xlsx
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stata命令.txt
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