concordance 2.0.0

Major improvements

• concord() is now a wrapper function for various concordance sub-functions: concord_hs_naics, concord_hs_sitc, concord_sitc_naics, concord_hs, and concord_sitc. The compartmentalizing of the original function allows the package to incorporate new product classification systems and versions more easily. Additionally, users can now choose (1) whether they want to return all matched outputs for each input, and (2) the preferred number of digits for outputs.

• All functions in the package are now vectorized with significant speed improvements.

Minor improvements

• get_sigma subsumes getSigma and listSigma. It now allows users to (1) choose the country for which to return import demand elasticities, and (2) use 5-digit SITC3 estimates for the United States (instead of the 3-digit HS0 default).

• For replication purposes, raw concordance data, along with R scripts that clean them, are now stored under https://github.com/insongkim/concordance/tree/master/data-raw.

Deleted Functions and Data

Functions

• extend_concordance has been removed as it is no longer needed in the main concord function.

• concord_test has been removed. Instead, see the various test scripts under https://github.com/insongkim/concordance/tree/master/data-raw, e.g., test-concord.R.

• getRauch and proddiff have been subsumed by get_proddiff.

• getSigma and listSigma have been subsumed by get_sigma.

• desc has been renamed as get_desc to improve the consistency in function names in the package.

Data

• Description data codedesc, code_lengths, and desclen have been removed. Instead, a separate description table for each classification and version is now visible in the package and can be loaded, e.g., data(sitc4_desc), data(hs5_desc), etc.

• Concordance data concord_data, concord_long, hs2sitc, and long_codes have been removed. Instead, a separate and cleaned concordance table for each pair of classification systems is now visible in the package and can be loaded, e.g., data(hs5_sitc4), data(hs5_naics), etc.

• Elasticity data BWsigma, sigma, and sigmatab have been removed. Instead, see data(sigma_hs0) and data(sigma_sitc3).

• Product differentiation data Rauch has been removed. Instead, see data(sitc2_rauch).