Over two dozen different terms for identification appear in the econometrics literature, including set identification, causal identification, local identification, generic identification, weak identification, identification at infinity, and many more. This survey (i) gives a new framework unifying existing definitions of point identification; (ii) summarizes and compares the zooful of different terms associated with identification that appear in the literature; and (iii) discusses concepts closely related to identification, such as normalizations and the differences in identification between structural models and causal, reduced form models.

中文翻译：

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识别动物园：计量经济学中识别的意义

计量经济学文献中出现了超过二十种不同的标识术语，包括集合标识，因果标识，局部标识，通用标识，弱标识，无穷大标识等。这项调查（i）提出了一个统一现有点识别定义的新框架；（ii）总结和比较文献中出现的与识别相关的各种不同术语；（iii）讨论与识别紧密相关的概念，例如规范化以及结构模型与因果简化形式模型之间的识别差异。