concord_hs_isic - R version

[kajalk27]

Hi,

I am trying to install and use the 'Concord_hs_isic' function to map HS to ISIC codes.

However, when I try to use it, I get this error:

concord_hs_isic(sourcevar, origin, destination, dest.digit = 4, all = FALSE)
Error in concord_hs_isic(sourcevar, origin, destination, dest.digit = 4, :
could not find function "concord_hs_isic"

So, I figured I need to install it first, and tried to do that, but I am getting this error about my R version:

install.packages("concord_hs_isic")
WARNING: Rtools is required to build R packages but is not currently installed. Please download and install the appropriate version of Rtools before proceeding:

https://cran.rstudio.com/bin/windows/Rtools/
Installing package into ‘C:/Users/kajal.kumar/AppData/Local/R/win-library/4.4’
(as ‘lib’ is unspecified)
Warning in install.packages :
package ‘concord_hs_isic’ is not available for this version of R

Can you help?

[stevenliaotw]

Hi,

Thanks for your interest in our package. ISIC-related code support should
be in the developer's version of the package. See installation instructions
here (https://github.com/insongkim/concordance?tab=readme-ov-file#installation-instructions).
Let me know if that fixes the issue.

Also, we usually use the main wrapper function “concord” instead of the
underlying sub-functions like “concord_naics_isic” to make everything
easier.

Best,
Steven

[kajalk27]

Hi Steven,

Thank you for sharing, i followed the installation instructions and it worked!

Can I check how to interpret the matches for example if i run:
concord(sourcevar = c("20"),
origin = "HS6", destination = "ISIC4",
dest.digit = 1, all = TRUE)

I get:
$ 20`$match
[1] "C" "D"

$20$weight
[1] 0.98165138 0.01834862

This tells me that HS code 20 matches to 98% of ISIC C and 2% of ISIC D. Is that correct?

Lastly, is there an option to match COICOP classifications to ISIC4?

Thanks very much,
Kajal

[stevenliaotw]

Hi Kajal,

No problem. Your interpretation is correct. Unfortunately, our package doesn't support the COICOP classification.

Steven

[kajalk27]

Hi Steven,

Thank you for confirming! and thanks for building such a great function

[kajalk27]

Hi Steven,

One more question: How do you come up with the weightings?

E.g. HS code 20 matches to 98% of ISIC C and 2% of ISIC D.

Is the 98% weight based on trade volume, trade value? If so, which country/year

Thanks,
Kajal

[stevenliaotw]

Hi Kajal,

The weightings represent the share of matches for each input code among all matched outputs, according to existing concordance tables. For example, see HS-ISIC concordance here https://wits.worldbank.org/product_concordance.html. Please see the README https://github.com/insongkim/concordance/tree/master#concording-different-classification-codes and the concord function for more details.

Best,
Steven