This is what I am getting

I am not sure to see what you are mentioning. Is the above having the issue ?

I used a web CSL for reproducibility (test.bib is yours unchanged)

---
title: "Test"
author: ""
date: "February 2023"
fontsize: 12pt
output: pdf_document
bibliography: test.bib
csl: https://www.zotero.org/styles/chicago-author-date
---

I have citations using both [@pereiraWhatConditionsPresidents2005] or Pereira, Power and Renno [-@pereiraWhatConditionsPresidents2005].

Otherwise can you share a screenshot of the wrong output ?

Can you share the pandoc version you are using ? rmarkdown::pandoc_version()

thanks

Thank you for your reply. My pandoc version is 2.14.0.3.

In the screenshot you sent you have the correct format, but when I try I get the full name again (as shown in the screenshot below), even using a web CSL as you did.

Here is the code in Rmarkdown:

And here is the output:

One interesting thing that I just noticed is that if I use only one reference (like in the screenshot below), I have the correct format as you have in your output too.

Code with one reference only:

Output with one reference only:

I emphasize that I have this issue only with these two authors called Pereira, when they come as first authors (i.e., when they come as second author there is no problem). Other people do not result in the same issue, regardless how many different papers from them I am citing.

Thank you for your time and support!

One interesting thing that I just noticed is that if I use only one reference (like in the screenshot below), I have the correct format as you have in your output too.

Can you share with me more references in the bib file then to try out on my side ?

it seems that using the first example providing which I try before you are having no issue like me right ?

Possibly something related to disambiguation that we find in CSL spec . CSL for chicago style seems to have configuration about this - see its source

I found this information in a possibly related issue in another tools that use Pandoc and Pandoc citeproc like R Markdown See quarto-dev/quarto-cli#4294 (comment) there.

CSL for chicago style seems to have configuration about this - see its source

Can you share with me more references in the bib file then to try out on my side ?

it seems that using the first example providing which I try before you are having no issue like me right ?

Here goes the other references:

@article{pereiraSurprisingSuccessMultiparty2012,
	title = {The {Surprising} {Success} of {Multiparty} {Presidentialism}},
	volume = {23},
	doi = {10.1353/jod.2012.0041},
	number = {3},
	journal = {Journal of Democracy},
	author = {Pereira, Carlos and Melo, Marcus Andr{\'e}},
	year = {2012},
	pages = {156--170}
}


@article{pereiraCostGoverningStrategic2004,
	title = {The {Cost} of {Governing}: {Strategic} {Behavior} of the {President} and {Legislators} in {Brazil}’s {Budgetary} {Process}},
	volume = {37},
	doi = {10.1177/0010414004266866},
	number = {7},
	journal = {Comparative Political Studies},
	author = {Pereira, Carlos and Mueller, Bernardo},
	year = {2004},
	pages = {781--815}
}

@article{pereiraWhatConditionsPresidents2005,
	title = {Under {What} {Conditions} {Do} {Presidents} {Resort} to {Decree} {Power}? {Theory} and {Evidence} from the {Brazilian} {Case}},
	volume = {67},
	doi = {10.1111/j.1468-2508.2005.00313.x},
	number = {1},
	journal = {The Journal of Politics},
	author = {Pereira, Carlos and Power, Timothy J. and Renno, Lucio},
	year = {2005},
	pages = {178--200}
}

@article{pereira2003successful,
  title={Successful Re-election Strategies in Brazil: The Electoral Impact of Distinct Institutional Incentives},
  author={Pereira, Carlos and Renno, Lucio},
  journal={Electoral Studies},
  volume={22},
  number={3},
  pages={425--448},
  year={2003},
  doi={10.1016/S0261-3794(01)00057-9}
}

@article{pereiraHemogramaGovernabilidadeNo,
	title = {Hemograma da Governabilidade no {Brasil}: Checando a Sa{\'u}de do Presidencialismo de Coaliz{\~a}o},
	author = {Pereira, Celina and Co{\^e}lho, Denilson Bandeira},
	year = {2016},
	journal = {Revista {\'I}bero-Americana de Estudos Legislativos},
	volume = {5},
	number = {1},
	pages = {1--23}
}

Possibly something related to disambiguation that we find in CSL spec . CSL for chicago style seems to have configuration about this - see its source

I found this information in a possibly related issue in another tools that use Pandoc and Pandoc citeproc like R Markdown See quarto-dev/quarto-cli#4294 (comment) there.

CSL for chicago style seems to have configuration about this - see its source

Following this reply, I tried once more without the second author and indeed there was no problem, so I will take a look at the links you provided and try to solve the issue. Thank you very much.

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