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did
双重差分估计
双重差分模型（difference-in-difference，DID）近年来多用于计量经济学中对于公共政策或项目实施效果 的定量评估。
通常大范围的公共政策有别于普通科研性研究，难以保证对于政策实施组和对照组在样本分配上的完全随机。非随机分配政策实施组和对照组的试验称为自然试验（naturaltrial），此类试验存在较显著的特点，即不同组间样本在政策实施前可能存在事前差异，仅通过单一前后对比或横向对比的分析方法会忽略这种差异，继而导致对政策实施效果的有偏估计。(Quantitative evaluation of policy or project implementation effect. Generally, a wide range of public policies is different from general scientific research, and it is difficult to ensure that the sample allocation for the policy implementation group and the control group is completely random. The non-randomly assigned policy implementation group and the control group are called natural trials, which have significant characteristics, i.e. there may be prior differences between the different groups of samples before the implementation of the policy, and this difference will be ignored only through a single pre-and post-comparison or horizontal comparison analysis method, which leads to the policy. Biased estimation of implementation)
- 2020-07-03 20:00:01下载
- 积分：1
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R-Programming-for-Data-Science
较基础的R语言学习书籍，初学时比较适用。(R language programming)
- 2016-05-25 11:23:01下载
- 积分：1
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R语言用于多元回归树分析，适用高版本的R mvpart_1.6-1
R语言用于多元回归树分析，适用高版本的R。(Multiple regression tree analysis in R language)
- 2021-03-22 17:29:15下载
- 积分：1
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FAVAR-master
FAVAR。运用结构化变量进行因子分析，拟合VAR模型(FAVAR. Structural variables were used for factor analysis to fit the VAR model)
- 2017-11-08 20:37:01下载
- 积分：1
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7.1 Bagging,RF&Adaboost
说明： 代码详细解释了bagging方法的运用，以及包含了详细的bagging代码(The code explains the application of bagging method in detail, and contains detailed bagging code.)
- 2019-05-23 13:28:17下载
- 积分：1
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cmd
说明： 制作pcoa、饼图、venn图、热图、柱状图的脚本，可直接改参数使用，内有注释，适用于微生物多样性(the Script to make PCOA)
- 2020-06-20 01:40:01下载
- 积分：1
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选择最近气象站
说明： 从plots文件中读取目标站点信息 从station文件读取气象站点信息 自动匹配距离目标站点最近的气象站名称(Automatically match the closest meteorogical station of subject plot.)
- 2019-04-18 10:59:48下载
- 积分：1
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these_final
these of diagnosis electrical machine
- 2016-01-17 18:37:27下载
- 积分：1
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选择最近气象站
从plots文件中读取目标站点信息 从station文件读取气象站点信息 自动匹配距离目标站点最近的气象站名称(Automatically match the closest meteorogical station of subject plot.)
- 2019-04-18 10:59:48下载
- 积分：1
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全年日降雨数据处理教程
说明： 数据集实体文件名称：中国降水日值0.5°×0.5°格点数据集文件命名由数据集代码（SURF_CLI_CHN_PRE_DAY_GRID_0.5）、年月日标识（YYYYMMDD）组成。具体形式：SURF_CLI_CHN_PRE_DAY_GRID_0.5-YYYYMMDD.TXT(Specific form:SURF_CLI_CHN_PRE_DAY_GRID_0.5-YYYYMMDD.TXT)
- 2021-01-05 21:48:54下载
- 积分：1
