When using pwt9 in publications, please cite both the pwt9 package and the Penn World Table itself:
Zeileis A (2019). pwt9: Penn World Table (Version 9.x). R package version 9.1-0, https://CRAN.R-project.org/package=pwt9.
To cite the Penn World Table (version 9.x), please use:
Feenstra RC, Inklaar R, Timmer MP (2015). “The Next Generation of the Penn World Table.” American Economic Review, 105(10), 3150–3182. http://www.ggdc.net/pwt/.
Corresponding BibTeX entries:
@Manual{,
title = {pwt9: Penn World Table (Version 9.x)},
author = {Achim Zeileis},
year = {2019},
note = {R package version 9.1-0},
url = {https://CRAN.R-project.org/package=pwt9},
}
@Article{,
title = {The Next Generation of the Penn World Table},
author = {Robert C. Feenstra and Robert Inklaar and Marcel P.
Timmer},
year = {2015},
journal = {American Economic Review},
volume = {105},
number = {10},
pages = {3150--3182},
url = {http://www.ggdc.net/pwt/},
}