here is a weird one:
I am working on the following data frame:
str(ccomb)
'data.frame': 358 obs. of 36 variables:
$ Country.Name : chr "Albania" "Albania" "Albania" ...
$ Donor : chr "EU Institutions" "EU Institutions" ...
$ Aid.type : chr "ODA: Total Net" "ODA: Total Net" ...
$ Amount.type : chr "Constant Prices" "Constant Prices" ...
$ year : num 2002 2003 2004 ...
$ Unit : chr "US Dollar" "US Dollar" "US Dollar" ...
$ PowerCode : chr "Millions" "Millions" "Millions" ...
$ Reference.Period : int 2020 2020 2020 ...
$ Total_Net_ODA : num 48.3 43.6 50.8 ...
$ geo : chr "EU27_2020" "EU27_2020" "EU27_2020" ...
$ EU_Exp : num 1166 1281 1376 ...
$ EU_Imp : num 355 396 416 ...
$ Control_of_Corruption : num -0.854 -0.724 -0.813 ...
$ Government_Effectiveness : num -0.569 -0.409 -0.705 ...
$ Political_Stability_and_Absence_of_Violence_and_Terrorism: num -0.31 -0.427 -0.505 ...
$ Regulatory_Quality : num -0.4902 -0.1875 -0.4007 ...
$ Rule_of_Law : num -0.716 -0.701 -0.764 ...
$ Voice_and_Accountability : num 0.07031 0.00724 0.00367 ...
$ pop : num 3.04 3.03 3.01 2.99 2.97 ...
$ GDPpC : num 2381 2522 2676 2851 3045 ...
$ aNNI : num 6.66 7.06 7.33 7.85 8.14 ...
$ openness : num 67 67 70.9 74.3 83.2 ...
$ import : num 46.2 44.8 47.9 ...
$ export : num 20.8 22.2 23 ...
$ infmort : num 20.4 19.1 17.8 ...
$ unemploy : num 17 16.3 16 15.6 16 ...
$ v2x_polyarchy : num 0.491 0.485 0.508 ...
$ v2x_libdem : num 0.398 0.4 0.416 0.436 ...
$ v2x_partipdem : num 0.318 0.322 0.341 ...
$ v2x_delibdem : num 0.383 0.382 0.422 ...
$ v2x_egaldem : num 0.355 0.353 0.361 ...
$ ref_UNHCR_EU : int 3851 3720 5385 ...
$ ref_asyl_seekers_EU : int 667 504 543 ...
$ refugees_EU : int 4518 4224 5928 ...
$ Governance : num -2.87 -2.44 -3.18 ...
$ region : chr "Western Balkan" "Western Balkan" ...
When using plm() on this data, there are several issues, resulting in the error messages: First, the error message occurs:
Error in plm(Total_Net_ODA ~ logpop, logGDPpC, openness, import, export, : arguments 'restrict.matrix' and 'restrict.rhs' cannot yet be used for single equations
When resolving this by setting restrict.matrix = NULL and restrict.rhs = NULL, it cannot find most of the variables anymore. So, I used pdata.frame() to deal with this. It actually works, but causes another problem. I used the following code for the transformation:
ccomb <- comb
str(ccomb)
rowvec <- c(1:358)
make.unique(.rowNamesDF(ccomb, make.names = TRUE) <- as.character(rowvec))
unique(rownames(ccomb))
duplicated(rownames(ccomb))
ccomb <- pdata.frame(comb, index=c("Country.Name", "year"), row.names = FALSE)
modE<-plm(Total_Net_ODA ~ openness, import, export, index=c("Country.Name", "year"),data = ccomb, model="within")
So, the code results in this error message:
Error in
.rowNamesDF<-(x, value = value) : duplicate 'row.names' not allowed In addition: Warning message: non-unique values when setting 'row.names': ‘19’, ‘21’, ‘22’, ‘23’, ‘24’, ‘25’, ‘26’, ‘27’, ‘28’, ‘29’, ‘30’, ‘31’, ‘32’, ‘33’, ‘34’, ‘35’, ‘36’, ‘37’, ‘38’, ‘39’, ‘40’, ‘41’, ‘42’, ‘43’, ‘44’, ‘45’, ‘46’, ‘47’, ‘48’, ‘49’, ‘50’, ‘51’, ‘52’, ‘53’, ‘54’, ‘55’, ‘56’, ‘58’, ‘59’, ‘60’, ‘61’, ‘62’, ‘63’, ‘64’, ‘65’, ‘66’, ‘67’, ‘68’, ‘69’, ‘71’, ‘73’, ‘76’, ‘78’
Which is weird, as the code above explicitly cancels out any nun-unique row names and the duplicated(rownames(ccomb)) line explicitly states FALSE to every row.
I hope that this information is sufficient. If not, please let me know.
Here is my session info, in case that helps:
─ Session info ─────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────
setting value
version R version 4.2.2 (2022-10-31 ucrt)
os Windows 10 x64 (build 19044)
system x86_64, mingw32
ui RStudio
language (EN)
collate German_Germany.utf8
ctype German_Germany.utf8
tz Europe/Berlin
date 2023-02-23
rstudio 2022.12.0+353 Elsbeth Geranium (desktop)
pandoc 2.19.2 @ C:/Program Files/RStudio/resources/app/bin/quarto/bin/tools/ (via rmarkdown)
─ Packages ─────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────
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This line seems flawed:
modE<-plm(Total_Net_ODA ~ openness, import, export, index=c("Country.Name", "year"),data = ccomb, model="within")
Seems like you want to estimate coefficients for variables import and export, so you would need to specify them within the formula argument, the first argument, like so:
modE<-plm(Total_Net_ODA ~ openness + import + export, index=c("Country.Name", "year"),data = ccomb, model="within")
Your command inputs import and export as 2nd and 3rd argument to plm, respectively, which is the data and subset argument.