| 来源类型 | Discussion paper
|
| 规范类型 | 论文
|
| 来源ID | DP6166
|
| DP6166 The Impact of Oil Price Shocks on the U.S. Stock Market |
| Lutz Kilian; Cheolbeom Park
|
| 发表日期 | 2007-03-09
|
| 出版年 | 2007
|
| 语种 | 英语
|
| 摘要 | Instrumental variable estimation requires untestable exclusion restrictions. With policy effects on individual outcomes, there is typically a time interval between the moment the agent realizes that he may be exposed to the policy and the actual exposure or the announcement of the actual treatment status. In such cases there is an incentive for the agent to acquire information on the value of the IV. This leads to violation of the exclusion restriction. We analyze this in a dynamic economic model framework. This provides a foundation of exclusion restrictions in terms of economic behavior. The results are used to describe policy evaluation settings in which instrumental variables are likely or unlikely to make sense. For the latter cases we analyze the asymptotic bias. The exclusion restriction is more likely to be violated if the outcome of interest strongly depends on interactions between the agent's effort before the outcome is realized and the actual treatment status. The bias has the same sign as this interaction effect. Violation does not causally depend on the weakness of the candidate instrument or the size of the average treatment effect. With experiments, violation is more likely if the treatment and control groups are to be of similar size. We also address side-effects. We develop a novel economic interpretation of placebo effects and provide some empirical evidence for the relevance of the analysis. |
| 主题 | Labour Economics
|
| 关键词 | Information
Placebo effect
Policy evaluation
Randomization
Selection effects
Treatment
|
| URL | https://cepr.org/publications/dp6166
|
| 来源智库 | Centre for Economic Policy Research (United Kingdom)
|
| 资源类型 | 智库出版物
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| 条目标识符 | http://119.78.100.153/handle/2XGU8XDN/535004
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推荐引用方式
GB/T 7714 |
Lutz Kilian,Cheolbeom Park. DP6166 The Impact of Oil Price Shocks on the U.S. Stock Market. 2007.
|
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