biblatex has an option firstinits which will abbreviate first and middle names in the bibliography. Is there any way to limit this behavior for the editor field only, so that it doesn't abbreviate names in the author field?
In the example below, the author should appear as Lennon, John, but the editors should appear as P. McCartney, J. Lennon, G. Harrison, and R. Starkey.
\documentclass{article}
\usepackage[style = authoryear-comp, maxnames = 99]{biblatex}
\usepackage{filecontents}
\begin{filecontents}{\jobname.bib}
@incollection{lennon1965,
AUTHOR = "John Lennon",
BOOKTITLE = "A book with articles",
EDITOR = "Paul McCartney and John Lennon and George Harrison and Richard Starkey",
TITLE = "This is my article in this book",
YEAR = "1965",
LOCATION = "Liverpool",
PAGES = "65--87",
PUBLISHER = "Cavern Club"}
\end{filecontents}
\addbibresource{\jobname.bib}
\begin{document}
\nocite{*}
\printbibliography
\end{document}

\DeclareNameAlias{editorin}{first-last}there, change that line to\DeclareNameAlias{editorin}{first-last-inits}. – moewe Apr 27 '14 at 13:39