help for iskotrei                                                John Hendrickx


iskotrei newvarname , isko(varname)


The isko package consists of a series of programs to recode ISCO-88 (International Classification of Occupations) codes into other occupational scales. Use the isco package to recode ISCO-68 occupational codes. These programs are Stata versions of the SPSS recode files by Harry B.G. Ganzeboom and Donald J. Treiman, which are available at http://www.fss.uu.nl/soc/hg/ismf.

iskotrei transforms ISCO-88 codes into Treiman's SIOPS scale (Standard International Occupational Prestige Scale); cf Treiman (1977). The argument for the isko commands must be a new variable name in which the recoded occupational scale is to be placed. The isko option is used specify the variable containing the ISCO-88 occupational codes.


isko specifies the variable to be recoded. This must be a 4 digit integer containing ISCO-88 occupational codes.


Ganzeboom, H.B.G., de Graaf, P.M. & D.J. Treiman. 1992. A Standard International Socio-Economic Index of Occupational Status. Social Science Research 21: 1-56.

ILO (International Labour Office). 1990. International standard classification of occupations: ISCO-88. Geneva: International Labour Office.

Treiman, D.J. 1977. Occupational Prestige in Comparative Perspective. New York: Academic Press.

Direct comments to:

John Hendrickx Management Studies Group Wageningen University Hollandseweg 1 6706 KN Wageningen The Netherlands

The isko package is available at SSC-IDEAS. Use ssc install isko to obtain the latest version.

Also see

On-line: help for isko, iskoegp, iskoisei, isko8868, iskolab, isco, iscoegp, iscoisei, iscotrei, isco6888, iscolab