Lewbel, Arthur <br/><br/>
The identification zoo: meanings of identification in econometrics 

 -  Journal of Economic Literature 
 - 57(4), Dec, 2019: p.835-903. 
<br/><br/> Over two dozen different terms for identification appear in the econometrics literature,<br/>including set identification, causal identification, local identification, generic identification,<br/>weak identification, identification at infinity, and many more. This survey: 1. gives a new<br/>framework unifying existing definitions of point identification, 2. summarizes and compares<br/>the zooful of different terms associated with identification that appear in the literature, and 3.<br/>discusses concepts closely related to identification, such as normalizations and the differences<br/>in identification between structural models and causal, reduced form models. - Reproduced