@book{BALT:01,
	author={B.H. Baltagi},
	title={Econometric Analysis of Panel Data},
	publisher={John Wiley and Sons ltd},
	year={2001},
	edition={3rd}
}

@book{BALT:13,
	author={B.H. Baltagi},
	title={Econometric Analysis of Panel Data},
	publisher={John Wiley and Sons ltd},
	year={2013},
	edition={5th}
}


@Article{BALT:PINN:95,
  author = 	 {Baltagi, Badi H. and Pinnoi, Nat},
  title = 	 {Public capital stock and state productivity growth:
                  further evidence from an error components model},
  journal = 	 {Empirical Economics},
  year = 	 {1995},
  OPTkey = 	 {},
  volume = 	 {20},
  OPTnumber = 	 {},
  pages = 	 {351-359},
  OPTmonth = 	 {},
  OPTnote = 	 {},
  OPTannote = 	 {}
}


@article{MUNN:90,
	author={A. Munnell},
	title={Why Has Productivity Growth Declined? Productivity and Public Investment},
	journal={New England Economic Review},
	year={1990},
	pages={3--22}
}


@Article{ZEIL:CROI:10,
    title = {Extended Model Formulas in {R}: Multiple Parts and Multiple Responses},
    author = {Achim Zeileis and Yves Croissant},
    journal = {Journal of Statistical Software},
    year = {2010},
    volume = {34},
    number = {1},
    pages = {1--13},
    url = {https://www.jstatsoft.org/v34/i01/}
}

@Manual{WICK:FRAN:23,
    title = {{dplyr}: A Grammar of Data Manipulation},
    author = {Hadley Wickham and Romain François and Lionel Henry and Kirill Müller and Davis Vaughan},
    year = {2023},
    note = {R package version 1.1.4},
    url = {https://CRAN.R-project.org/package=dplyr},
}

@Manual{BACH:WICK:22,
    title = {{magrittr}: A Forward-Pipe Operator for {R}},
    author = {Stefan Milton Bache and Hadley Wickham},
    year = {2022},
    note = {R package version 2.0.3},
    url = {https://CRAN.R-project.org/package=magrittr},
 }

@Manual{MULL:WICK:23,
    title = {{tibble}: Simple Data Frames},
    author = {Kirill Müller and Hadley Wickham},
    year = {2023},
    note = {R package version 3.2.1},
    url = {https://CRAN.R-project.org/package=tibble},
  }


@Book{PEBE:BIVA:23,
    author = {Edzer Pebesma and Roger Bivand},
    title = {{Spatial Data Science: With applications in R}},
    year = {2023},
    publisher = {{Chapman and Hall/CRC}},
    url = {https://r-spatial.org/book/},
    doi = {10.1201/9780429459016},
}

@Article{PEBE:18,
    author = {Edzer Pebesma},
    title = {{Simple Features for R: Standardized Support for Spatial Vector Data}},
    year = {2018},
    journal = {{The R Journal}},
    doi = {10.32614/RJ-2018-009},
    url = {https://doi.org/10.32614/RJ-2018-009},
    pages = {439--446},
    volume = {10},
    number = {1},
}

@Manual{EAST:23,
    title = {poorman: A Poor Man's Dependency Free Recreation of 'dplyr'},
    author = {Nathan Eastwood},
    year = {2023},
    note = {R package version 0.2.7},
    url = {https://CRAN.R-project.org/package=poorman},
}
