There's a question for textbooks here, but I would like to ask similar question about handbooks: what econometrics handbooks would you recommend?
Assumed audience is researchers and graduate-level students. It needs to include the material of Greene's Econometric Analysis and Wooldridge's Econometric Analysis of Cross Section and Panel Data in a denser form (without discussions and proofs), as well as mainstream techniques not mentioned in these two books.
One option is Elsevier's 6 volumes of Handbook of Econometrics series edited by Griliches and Instriligator. However, perhaps you would recommend other handbooks, more concise or otherwise?
I suggest two possible formats: one is a reference-card format with minimum explanations, and the other one is a more extended format with proofs and more detailed exposition.