Biblatex: Manually sorting one paper and its regarding corrigendum

Question

I have one paper, with a corresponding (distinctly published) corrigendum. However, I want the corrigendum to be listed directly after the original paper.

Here is a short MWE:

\documentclass[a4paper,12pt]{scrartcl}

\usepackage[ngerman]{babel}

\usepackage{csquotes}
\usepackage[style=ext-authoryear,
sorting=nyt,maxbibnames=9,maxcitenames=2,uniquelist=false, backend=biber, 
doi=false,isbn=false,url=false,
uniquename=false, date=year, giveninits=true, dashed=false]
{biblatex}
\usepackage{filecontents}
\begin{filecontents}{\jobname2.bib}
@Article{Hansen2011,
  author  = {Hansen, Peter R. and Lunde, Asger and Nason, James M.},
  title   = {The Model Confidence Set},
  journal = {Econometrica},
  year    = {2011},
  volume  = {79},
  number  = {2},
  pages   = {453-497},
  url     = {https://EconPapers.repec.org/RePEc:ecm:emetrp:v:79:y:2011:i:2:p:453-497},
}

@Article{Hansen2011b,
  author  = {Hansen, Peter R. and Lunde, Asger and Nason, James M.},
  title   = {Corrigendum to “The Model Confidence Set”},
  journal = {Econometrica},
  year    = {2011},
  volume  = {79},
  number  = {2},
}

\end{filecontents}
\addbibresource{\jobname2.bib} 

\begin{document}
\textcite{Hansen2011}
\textcite{Hansen2011b}
\printbibliography
\end{document}

I just want to change the sort order for the two papers. Otherwise, the paper that was first published should continue to be listed with the same authors. Maybe it helps to say that I quoted him text first the original paper and then the corrigendium

Answer 1

I suggest that you make use of the sorttitle BibLaTeX field (see pg. 30, within § 4.5.9 "Fine Tuning Sorting", of the BibLaTeX manual) for this purpose, as discussed in a related answer.

Specifically, you can simply add sorttitle = {The Model Confidence Set corrigendum} to Hansen2011b, which will ensure that it is placed after Hansen2011.

You could alternatively use sortyear or presort in conjunction with other modifications, as outlined elsewhere.