concordance (version 1.6)

proddiff: proddiff

Description

proddiff is used to return a measure of product differentiation for a given product.

Usage

proddiff(sourcevar, origin, setting='CON', prop='')

Arguments

sourcevar

Vector which contains the codes to be converted

origin

Coding scheme of origin (name enclosed in quotes "")

setting

For Rauch classification: choose "CON" (conservative, default) or "LIB" (liberal)

prop

If set to 'w', 'r', or 'n', counts proportion of letter in resulting vector of Rauch classifications.)

Value

Concords given list of codes to list of SITC2 codes, then uses this as input to concord to Rauch product differentiation indices. Does not differentiate between codes corresponding to different codes in input vector.

Details

Rauch classifies each SITC Rev. 2 industry according to three possible types: differentiated products ('n'), reference priced ('r'), and homogeneous goods traded on an organized exchange ('w').

Supports the following classifications: HS, HS0, HS1, HS2, HS3, HS4, ISIC2, ISIC3, SITC1, SITC2, SITC3, SITC4, NAICS

The following strings can be used as arguments for origin: "naics", "hs" (for HS Combined), "hs0" (1988/92), "hs1" (1996), "hs2" (2002), "hs3" (2007), "hs4" (2012), "isic2", "isic3", "sitc1", "sitc2", "sitc3", "sitc4".

Also accepts aggregated (shorter) or disaggregated (longer) codes.

setting may be set to 'CON' (conservative, the default setting) or 'LIB' (liberal.)

prop may be set to 'w', 'r', or 'n', in which case the function will return the proportion of 'w', 'r', or 'n' in the resulting vector of Rauch indices (or, at the moment, NA if the proportion is zero.) If prop is not set to any of these then the function returns a table showing counts of 'w', 'r', and 'n' in the resulting vector of Rauch indices.

You may also wish to look up the getRauch function, which has similar but more specialised functionality, and may work better in some cases.

References

Rauch, James E. "Networks versus markets in international trade." Journal of international Economics 48.1 (1999): 7-35.

C. Broda and D. Weinstein, "Globalization and the Gains from Variety," Quarterly Journal of Economics Volume 121, Issue 2 - May 2006

Examples

# NOT RUN {
proddiff("020", "hs")
## % Returns "rauch
## % n r w 
## % 1 2 3"

proddiff("020", "hs", setting="lib")
## % Returns "rauch
## % n r w 
## % 1 2 3"

proddiff("020", "hs", prop='w')
## % Returns "w 
## % 0.5" 

proddiff("020", "hs", setting='lib', prop='r')
## % Returns "r 
## % 0.3333333" 
# }