I am trying to generate a bibliography to summarize research in a certain field. The bibliography is required to be formatted Chicago style. Since this bibliography is not accompanying an actual document I'd like to suppress certain behaviours.

  • biblatex-chicago replaces recurrent authors names with 3 em-dashes. This isn't desirable since this bibliography must be sorted nyt rather then ynt. Using the dashed=false option do not work (biblatex-chicago doesn't seem to support this option)
  • To differentiate multiple bibliography entries by the same author in the same year biblatex-chicago adds a letter suffix to the year in the bib entry. This is not desirable since without in-text citations they don't serve any purpose.

Here is a simple example:


    Author = {Author B},
    Title = {Book 1},
    Year = {2008}}

    Author = {Author B},
    Title = {Book 2},
    Year = {2009}}

    Author = {Author A},
    Title = {Book 3},
    Year = {2010}}

    Author = {Author A},
    Title = {Book 4},
    Year = {2010}}





Which produces the following:

B, Author. 2008. Book 1.

———, Author. 2009. Book 2.

A, Author. 2010a. Book 3.

———, Author. 2010b. Book 4.

I'd like it to look like this:

B, Author. 2008. Book 1.

B, Author. 2009. Book 2.

A, Author. 2010. Book 3.

A, Author. 2010. Book 4.

2 Answers 2


biblatex-chicago unfortunately doesn't have a dashed option like the standard styles. To avoid printing the dash, you can clear \bbx@lasthash before printing each entry using the \AtEveryBibitem hook. \bbx@lasthash normally expands to the name hash of the last entry. It is used by the drivers for dash checks.

The alphabetic year suffix used for disambiguation corresponds to the extrayear field. It can be cleared with \AtEveryBibitem as well.

Just add the following to your preamble:


To remove the letter suffix after the year, add the following to your preamble:

  • 2
    This stopped working for me and I had to use extradate instead of extrayear.
    – dayne
    Commented Jul 17, 2018 at 20:22
  • This answer for me when every alternative solution on here didn't. If someone can explain why different solutions are working for some people and not for others, I'm sure that would be helpful.
    – ASGM
    Commented Jan 31, 2020 at 23:22
  • Conceptually, it does not feel nice to suppress a field from the output by making its field format empty, but it works (because biblatex explicitly checks for that case). To completely get rid of a field it is usually nicer to use a sourcemap (in case it's an input field), tell Biber not to generate the field (in case it is an auto-generated field like extradate) or to stop it being read from the .bbl file with \DeclareFieldInputHandler{extradate}{\def\NewValue{}}, cf. tex.stackexchange.com/a/550110/35864
    – moewe
    Commented Jun 19, 2020 at 14:06

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