[R] Synthetic Control Method

[Bert Gunter]

Note that your unit.variable and unit.names.variable are indentical. Is
this what you intended?

(I have no idea how the Synth package works).

Bert

On Tue, Apr 16, 2024 at 12:58 AM <nadja.delliehausen using bluewin.ch> wrote:

> Good Morning
>
>
>
> I want to perform a synthetic control method with R. For this purpose, I
> created the following code:
>
>
>
> # Re-load packages
>
> library(Synth)
>
> library(readxl)
>
>
>
> # Pfadeinstellung Excel-Blatt
>
> excel_file_path <-
> ("C:\\Users\\xxxxx\\Desktop\\DATA_INVESTMENTVOLUMEN_FOR_R_WITHOUT_NA.xlsx")
>
>
>
> # Load the Excel file
>
> INVESTMENTVOLUME <- read_excel(excel_file_path)
>
>
>
> # Anzeigen des gesamten Dataframes
>
> print(INVESTMENTVOLUME)
>
>
>
> # Make sure BFS is numeric right before dataprep
>
> INVESTMENTVOLUME$BFS <- as.numeric(INVESTMENTVOLUME$BFS)
>
>
>
> # running dataprep
>
> dataprep_out <- dataprep(
>
>   foo = INVESTMENTVOLUME,
>
>   predictors = c("Predictor 1", " Predictor 2", " Predictor 3" Predictor
> 4",
> " Predictor 5", " Predictor 6"),
>
>   special.predictors = list(list("Special Predictor 1", seq(1, 12, by =
> 1))),
>
>   dependent = "INVESTMENTVOLUME_12_MONTH_AVERAGE",
>
>   unit.variable = "BFS",
>
>   time.variable = "DATE",
>
>   treatment.identifier = XXXX,
>
>   controls.identifier =
> unique(INVESTMENTVOLUME$BFS[-which(INVESTMENTVOLUME$BFS == XXXX)]),
>
>   time.predictors.prior = as.Date("2010-01-01"):as.Date("2017-10-01"),
>
>   time.optimize.ssr = as.Date("2010-01-01"):as.Date("2017-10-01"),
>
>   time.plot = as.Date("2010-01-01"):as.Date("2024-03-01"),
>
>   unit.names.variable = "BFS"
>
> )
>
>
>
> synth_out <- synth(
>
>   data.prep.obj = dataprep_out
>
> )
>
>
>
> I keep getting the same error message. Unfortunately, ChatGPT and solutions
> from various forums do not help. My unit variables are all numeric except
> one, which is a date and has POSIXct as type.
>
> Fehler in dataprep(foo = INVESTMENTVOLUME, predictors = c("Predictor 1",
> :
>
>
>
>  unit.variable not found as numeric variable in foo.
>
>
>
> I would be very grateful if you could help me with my problem.
>
>
>
> Thank you in advance for your efforts.
>
>
>
> Kind regards
>
> Nadja Delliehausen
>
>
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>
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