get_proddiff {concordance}

Looking Up Product Differentiation

Description

Returns Rauch's classification of product differentiation. Rauch classifies 4-digit SITC2 codes according to three possible types: differentiated products ("n"), reference priced ("r"), and homogeneous goods traded on an organized exchange ("w").

Usage

get_proddiff(sourcevar, origin, setting = "CON", prop = "")

Arguments

sourcevar

An input character vector of industry/product codes.

origin

A string setting the input coding scheme. Supports the following classifications: "HS0" (1988/92), "HS1" (1996), "HS2" (2002), "HS3" (2007), "HS4" (2012), "HS5" (2017), "HS" (combined), "SITC1" (1950), "SITC2" (1974), "SITC3" (1985), "SITC4" (2006), "NAICS" (combined).

setting

Choose "CON" (conservative, default) or "LIB" (liberal) classification.

prop

Can be set to "n", "r", or "w", in which case the function will return, respectively, the proportion of type "n", "r", or "w" in the resulting vector of Rauch indices. If prop is not set to any of these, then the function returns, for each input code, a dataframe that summarizes all the frequencies and proportions of type "w", "r", and "n".

Value

Concords each element of the input vector to 4-digit SITC2 codes, then uses the corresponding codes as input to extract Rauch product differentiation indices.

Note

Always include leading zeros in codes (e.g. use HS code 010110 instead of 10110)—results may be buggy otherwise.

Source

Data from Jon Haveman's International Trade Data page <http://www.macalester.edu/research/economics/PAGE/HAVEMAN/Trade.Resources/TradeData.html#Rauch>.

References

Rauch, James E. 1999. "Networks Versus Markets in International Trade," Journal of International Economics 48(1): 7–35.

Examples

# SITC2 input
get_proddiff(sourcevar = c("22240", "04110"), origin = "SITC2", setting = "CON", prop = "")

get_proddiff(sourcevar = c("22240", "04110"), origin = "SITC2", setting = "CON", prop = "r")

get_proddiff(sourcevar = c("22240", "04110"), origin = "SITC2", setting = "CON", prop = "w")

get_proddiff(sourcevar = c("22240", "04110"), origin = "SITC2", setting = "CON", prop = "n")

get_proddiff(sourcevar = c("22240", "04110"), origin = "SITC2", setting = "LIB", prop = "")

# SITC3 input
get_proddiff(sourcevar = c("22240", "04110"), origin = "SITC3", setting = "CON", prop = "")

# SITC4 input
get_proddiff(sourcevar = c("22240", "04110"), origin = "SITC4", setting = "CON", prop = "")

# HS input
get_proddiff(sourcevar = c("1206", "1001", "8546"), origin = "HS", setting = "CON", prop = "")

# NAICS input
get_proddiff(sourcevar = c("111120", "326199"), origin = "NAICS", setting = "CON", prop = "")