natbib: supressing first name abbreviations in text

I cite two authors with the same last name. When citing them in the document, natbib automatically adds the first names (abbreviated), to differentiate between them. I saw that with biblatex, one can add [uniquename=false], to suppress such a thing happening. I have not found a similar option in natbib. Is it possible to suppress it in natbib in some way though?

documentclass[a4paper, bibtotocnumbered,liststotoc,12pt]{scrartcl}
usepackage{apacite}
usepackage{hyperref}
usepackage{natbib}
usepackage[T1]{fontenc}
usepackage[latin1]{inputenc} 
usepackage[english]{babel}

begin{document}

... citet{jones1991} ... citet{jonesetal2008}
bibliographystyle{apacite}
bibliography{testxyz}

end{document}

The respective .bib file is as follows:

@article{jones1991,
author = {Jones, Jennifer J.},
journal = {Journal of Accounting Research},
number = {2},
pages = {193--228},
publisher = {[Accounting Research Center, Booth School of Business, University of Chicago, Wiley]},
title = {Earnings Management During Import Relief Investigations},
volume = {29},
year = {1991}
}

@article{jonesetal2008,
author = {Jones, Keith L. and Krishnan, Gopal V. and Melendrez, Kevin D.},
     title = {Do Models of Discretionary Accruals Detect Actual Cases of Fraudulent and Restated    Earnings? An        Empirical Analysis},
 journal = {Contemporary Accounting Research},
 volume = {25},
 number = {2},
 pages = {499-531},
 year = {2008}
 }