请教 关于instrumental variable_百度知道
请教 关于instrumental variable
我有更好的答案
u) = 0 ( ⇐⇒ E(wu) = 0)(ii) 0 =&#47。（当然;= COR(w，那么他就可以成为Instrument variable 而被使用了, x4) (“inclusion restriction” )
x4: the endogenous regressor(iii) w does not appear in the y equation (“exclusion restriction”)只要满足这三个条件，不完全满足以上的三个条件。其实，管他是几个，工具变量的个数应该大于等于内生变量个数）而，根据楼主的提示，这应该是说你的工具变量没有找对首先，在使用IV(w)的时候需要三个前提：(i) COR(w
采纳率：93%
来自团队：
为您推荐：
其他类似问题
换一换
回答问题，赢新手礼包
个人、企业类
违法有害信息,请在下方选择后提交
色情、暴力
我们会通过消息、邮箱等方式尽快将举报结果通知您。医学会议频道
聚焦转化医学和多学科融合
MedSci梅斯医学APP下载
大家还在关注：
工具变量（instrumental variable）理论与因果推断
作者：丁鹏&&&来源：统计之都
相关资讯：
猜你感兴趣
资讯分类阅读
关注Medsci
免责声明：MedSci(梅斯医学)登载此文出于传递信息目的，并不意味着赞同其观点或证实其描述。内容仅供专业医生学习，不可替代医师诊断或处方，具体诊断和治疗请咨询专科医生，本站不承担由此导致的相关责任。
MedSci备案号
扫码领取IF曲线
IF连续增长的期刊Instrumental Variables: A Study of Implicit Behavioral Assumptions Used in Making Program Evaluations on JSTOR
Have library access?
Instrumental Variabl...
Journal Article
James Heckman
The Journal of Human Resources
Vol. 32, No. 3 (Summer, 1997), pp. 441-462
Published by:
Stable URL: http://www.jstor.org/stable/146178
Page Count: 22
You can always find the topics here!
Were these topics helpful?
Instrumental variables
Instrumental variables estimation
Mathematical independent variables
Economic models
Random variables
Unobservables
Human resources
Estimation methods
Selection bias
Cite This Item
Copy Citation
Export Citation
(For EndNote, ProCite, Reference Manager, Zotero…)
(For BibTex)
Note: Always review your references and make any necessary corrections before using. Pay attention to names, capitalization, and dates.
Article Tools
You have javascript disabled.
In order to preview this item and view access options please enable javascript.
Since scans are not currently available to screen readers, please
We'll provide a PDF copy for your screen reader.
Read Online (Beta)
Read Online (Free) relies on page scans, which are not currently available to screen readers. To access this article, please
We'll provide a PDF copy for your screen reader.
Add to your shelf
Read this item online for free by registering for a MyJSTOR account.
Already have an account?
How does it work?
Register for a MyJSTOR account.
Add up to 3 free items to your shelf.
Items added to your shelf can be removed after 14 days.
How does it work?
Select the
purchase option.
Check out using a credit card or bank account with .
Read your article online and download the PDF from your email or your MyJSTOR account.
Access supplemental materials and multimedia.
Unlimited access to purchased articles.
Ability to save and export citations.
Custom alerts when new content is added.
Yearly Plan
Access everything in the JPASS collection
Read the full-text of every article
Download up to 60 article PDFs to save and keep
This paper considers the use of instrumental variables to estimate the mean effect of treatment on the treated, the mean effect of treatment on randomly selected persons and the local average treatment effect. It examines what economic questions these parameters address. When responses to treatment vary, the standard argument justifying the use of instrumental variables fails unless person-specific responses to treatment do not influence decisions to participate in the program being evaluated. This requires that individual gains from the program that cannot be predicted from variables in outcome equations do not influence the decision of the persons being studied to participate in the program. In the likely case in which individuals possess and act on private information about gains from the program that cannot be fully predicted by variables in the outcome equation, instrumental variables methods do not estimate economically interesting evaluation parameters. Instrumental variable methods are extremely sensitive to assumptions about how people process information. These arguments are developed for both continuous and discrete treatment variables and several explicit economic models are presented.
Page Thumbnails
Processing your request...
Processing your request...instrumental variable
[经] 工具变量；工具变数
工具变量（Instrumental Variable）
基于1110个网页-
为防止这样的 问题发生，最好的方法就是采用工具变数(instrumental variable)，其条件为与当 期消防人员数目相关，但与误差项不相关之变数。
基于58个网页-
摘要:辅助变量(Instrumental Variable)在抽样调查中，变量按具体作用可分为调查变量和辅助变量两种。
基于23个网页-
运用工具变量法（instrumental variable）估计 VEU，可以将公式（19）改写 成公式（21）的形式：
基于8个网页-
工具变量估计量
工具变量估计式
工具变量估计法
工具变量估计
工具变数法
辅助变量法
工具变量法
仪器变量法
工具变量法
迭代工具变量法
迭代工具变数法
工具变量正规方程
工具变量估计法
辅助变量辩识方法
更多收起网络短语
- 引用次数：9
参考来源 -
- 引用次数：11
Iterative Instrumental Variable Least Squares method with controller was used in the algorithm, to solve the difficulty of identification of delay time and identifiability of close loop systems.
该方法采用带控制器的迭代辅助变量最小二乘法,解决了纯滞后时间估计和闭环系统可辨识性的问题。
参考来源 -
- 引用次数：1
参考来源 - 临床试验数据的EV模型
- 引用次数：2
Error variances are necessaryto estimate parameters in measurement error model. An important alternativemethod is to adopt instrumental variable.
测量误差模型的识别不能仅仅依靠变量的观测值,还需要误差方差等有关的信息,然而并不是所有的研究都可以得到这样的信息,这时可以借助于辅助变量来完成测量误差模型的识别和参数估计。
参考来源 - 测量误差模型及其医学研究应用
- 引用次数：4
参考来源 -
&2,447,543篇论文数据，部分数据来源于
Instrumental variable
In statistics, econometrics, epidemiology and related disciplines, the method of instrumental variables (IV) is used to estimate causal relationships when controlled experiments are not feasible or when a treatment is not successfully delivered to every unit in a randomized experiment.
以上来源于:
However, the authors control for this with a cunning instrumental variable - the fact that there are more hospitals in areas with lots of marginal constituencies.
然而，作者用一种狡猾的工具变量控制了数据。 事实上，在许多边远地区有更多的医院。
Instrumental variable analysis was used to address potential biases associated with unmeasured confounding variables.
应用实验室变量分析以修正由混杂变量所致的潜在偏倚。
Instrumental variable analysis attempts to do just that, standing in contrast to the standard approach used in clinical studies.
First, a brief discussion of instrumental variable analysis.
Economists attempt to make the fudge factor as grounded in reality as possible, but instrumental variable analysis inevitably requires the analyst to give short shrift to the hard data and make assumptions about the differences between two populations, and how external factors (like insurance status) affect them.
$firstVoiceSent
- 来自原声例句
请问您想要如何调整此模块？
感谢您的反馈，我们会尽快进行适当修改！
请问您想要如何调整此模块？
感谢您的反馈，我们会尽快进行适当修改！345被浏览25,528分享邀请回答13830 条评论分享收藏感谢收起