Derivations of Social Class (SC) and Socio-economic Groups (SEG)
from the Standard Occupational Classification 2000 (SOC2000)


In addition to occupation coded to SOC2000 you will need 
information on the employment status. This is use to create 
a variable - empstat - with the following categories:

1 self-employed with 25 or more employees
2 self-employed with less than 25 employees
3 self-employed with no employees
4 manager in an establishment with 25 or more employees
5 manager in an establishment with less than 25 employees
6 supervisor
7 employee


The appropriate derivation matrix is matched onto your data by 
SOC2000. This will create seven new variables in your data - 
se25p, sel25, seno, man25p, manl25, sup, and emp.


To use these to create a SC or SEG variable is as follows:

if empstat=1 then SC/SEG=se25p
if empstat=2 then SC/SEG=sel25
if empstat=3 then SC/SEG=seno
if empstat=4 then SC/SEG=man25p
if empstat=5 then SC/SEG=manl25
if empstat=6 then SC/SEG=sup
if empstat=7 then SC/SEG=emp

These derivation matrices are 'open' - that is, not all the
cells have a corresponding SC or SEG value.

If the combination of SOC2000 and employment status results 
in a value of -8 then it is an invalid combination. ONS 
provides 'priority rules' for selecting an alternative 
employment status value. See their web page at:
http://www.statistics.gov.uk/nsbase/methods_quality/ns_sec/steps_full_method.asp

The values in the SC/SEG variables are:

Social Class

Value	Class		Description
10	I		Professional, etc occupations
20	II		Managerial and Technical occupations
31	IIIN		Skilled occupations - Non-manual
32	IIIM		Skilled occupations - Manual
40	IV		Partly skilled occupations
50	V		Unskilled occupations
60	VI		Armed forces

Socio-economic Groups

Value	Class		Description
11	1.1		Employers in industry, commerce, etc large 
                  establishments
12	1.2		Managers in central and local government, industry, 
                  commerce, etc large establishments
21	2.1		Employers in industry, commerce, etc small 
                  establishments
22	2.2		Managers in industry, commerce, etc small 
                  establishments
30	3		Professional workers - self-employed
40	4		Professional workers - employees
51	5.1		Intermediate non-manual workers - ancillary works 
                  and artists
52	5.2		Intermediate non-manual workers - foremen and 
                  supervisors non-manual
60	6		Junior non-manual workers
70	7		Personal service workers
80	8		Foremen and supervisors - manual
90	9		Skilled manual workers
100	10		Semi-skilled manual workers
110	11		Unskilled manual workers
120	12		Own account workers other than professional
130	13		Farmers - employers and managers
140	14		Farmers - own account
150	15		Agricultural workers
160	16		Members of armed forces