CAMSIS PROJECT : LIST OF MAJOR ADDITIONS / REVISIONS TO WEB PAGES, AND ASSOCIATED DOWNLOADABLE FILES, SINCE FIRST RELEASE OF WEBPAGES, FEB 28 2002. CAMSIS PROJECT HOMEPAGE : http://www.cf.ac.uk/socsi/CAMSIS/ ------------------------------------------------ [latest revisions from top down] ----------------------------------------------------- 12.7.04 ADDITION OF A CAMSIS INDEX FILE FOR USA 2000, USING US SOC 2000 VIA IPUMS CENSUS 2000 EXTRACT ----------------------------------------------------- 3.4.03 UPDATE TO THE CAMSIS INDEX FILES STORED ON THE MACHINES OF THE LISPROJECT, SEE http://www.cf.ac.uk/socsi/CAMSIS/lisles.html VERSIONS ALLOW LINKING CAMSIS SCORES WITH LIS DATASETS FOR: Austria, Britain, Czech Republic, Germany, Hungary, Ireland, Russia, Slovakia, Slovenia, Sweden, Switzerland, USA . ----------------------------------------------------- 1.4.03 RE-RELEASE OF RUSSIAN SCORES CORRECTING A SINGLE FALSE SCORE ASSIGNED TO THE ARMED FORCES ISCO88 OCCUPATION 110. ---------------------------------------------------- 26.3.03 ADDITION OF 4 NEW CAMSIS VERSIONS COVERING : AUSTRIA CZECH REPUBLIC SLOVAKIA SLOVENIA (SEE THE VERSIONS PAGE AND ITS LINKS TO DOWNLOAD RELEVANT FILES) ALL OF THESE VERSIONS ARE PRODUCED FOR ISCO-88 UNITS BASED UPON ANALYSIS OF FILES AVAILABLE THROUGH THE LIS PROJECT (WWW.LISPROJECT.ORG). ---------------------------------------------------- 3.3.03 RE-RELEASE OF AN APPROXIMATE VERSION FOR UK 1991 SOC 2000 UNITS, BASED UPON THE SCORES DERIVED FOR UK 1991 SOC 1990 UNITS. THESE FILES SUPERSEDE A RELEASE DOWNLOADABLE BETWEEN AUGUST 2002 AND FEB 2003. ---------------------------------------------------- 11.2.03 RELEASE OF A VERSION FOR RUSSIA, ISCO88 UNITS USING DATA FROM 1992 AND 1995 ----------------------------------------------------- 4.2.03 RE-RELEASE OF VERSIONS FOR SWITZERLAND AND SWEDEN THESE RELEASES, VERSION 2.1 FOR SWIZERLAND AND 1.1 FOR SWEDEN, CORRECT A SMALL ERROR MADE DURING THE PROCESS OF DISTRIBUTING MODEL RESULTS TO THE INDEX FILES ON THE PREVIOUS RELEASES FOR THESE TWO COUNTRIES. THE SCORES FOR MOST OCCUPATIONS SHOULD BE BARELY ALTERED BETWEEN THE RELEASES. ---------------------------------------------------- 22.1.03 USA 1960 ADDITION OF DOWNLOADABLE INDEX FILE AND ACCOMPANYING NOTES FOR A CAMSIS VERSION FOR THE USA IN 1960, BASED UPON THE US 1960 CENSUS OCCUPATIONAL CLASSIFICATION --------------------------------------------------- 22.1.03 CORRECTION OF A MINOR ERROR WITHIN THE INSTRUCTIONS ON MATCHING CAMSIS INDEX FILES WITH USERS' OWN DATA, FOUND IN THE README FILES OF MANY OF THE DOWNLOADABLE ARCHIVES. ---------------------------------------------------- 6.1.03 ADDITION OF CAMSIS CODES FOR A COUPLE OF NEW COUNTRIES. THROUGH THE 'CHER' CAMSIS DATASET, WE HAVE MADE AVAILABLE SIMPLE CAMSIS DERIVATIONS AT THE 2 DIGIT ISCO88 LEVEL FOR A FEW CHER COUNTRIES NOT OTHERWISE COVERED IN THE CAMSIS PROJECT. THE LEVEL OF DETAIL IS LESS THAN WE NORMALLY FAVOUR BUT THEY SHOULD PROVIDE SOME WORKING APPROXIMATIONS FOR : - BELGIUM - DENMARK - LUXEMBOURG - POLAND - PORTUGAL ----------------------------------------------------------- 6.1.03 UPDATE TO THE PAGES CONCERNING THE LIS DATAFILES, AND CORRESPONDING REVISION TO DATAFILES STORED ON THE LIS PROJECT MACHINES. THE NOTES ON THE LIS PAGE, http://www.cf.ac.uk/socsi/CAMSIS/lisles.html SHOULD BE SELF EXPLANATORY ---------------------------------------------------- 16.12.02 - MANY OF THE MAIN WEBPAGES HAVE BEEN UPDATED, TIDYING UP SOME OF THE TEXT DESCRIPTIONS AND CHANGING THE DOCUMENTATION WITH REGARD TO A NUMBER OF DATA FILES WHICH HAVE BEEN RE-RELEASED - 'RELEASE 2' OF MANY OF THE DOWNLOADABLE FILES. THIS RELEASE CHANGES THE WAY WE DEAL WITH THE PRESENCE OR ABSENCE OF EMPLOYMENT STATUS DATA ON THE CAMSIS FILES. PREVIOUSLY, WE CALCULATED SEPARATE VERSIONS ON THE SAME DATASET, ONE AT THE 'TITLE ONLY' LEVEL AND ONE USING 'TITLE-BY-STATUS' UNITS. THIS SEEMED IN SOME WAYS INEFFICIENT, AND IN RECENT RELEASES WE NOW ONLY RELEASE A SINGLE VERSION FOR EACH DATASET / COUNTRY, WHERE SCORE VALUES CAN BE LINKED TO THE SAME OCCUPATIONAL UNITS WHATHEVER THE DEGREE OF EMPLOYMENT STATUS INFORMATION HELD IS. - FURTHER PLANNED UPDATES ARE : -- REVISION AND UPDATE OF THE WEBPAGES DESCRIBING THE LIS AND LES STUDIES (AND UPDATING OF THE DATAFILES STORED AT LIS) -- COMPLETE UPDATE TO THE 'CONSTRUCTION GUIDE' DESCRIBING THE CHANGES ADOPTED FOR THE RELEASE 2 DOCUMENTS (ANY USERS UNCERTAIN OF CURRENT STATUS OF FILES, PLEASE FEEL FREE TO CONTACT US) ----------------------------------------------------- 23.10.02 ADDITION OF A PAGE ALONG WITH APPROPRIATE DOWNLOADABLE FILES ALLOWING FOR MATCHING OF CAMSIS SCORES WITH THE CROSS-NATIONALLY HARMONISED PANEL DATASETS OF THE CHER STUDY. SEE LINK FROM THE 'VERSIONS' PAGE. ----------------------------------------------------- 15.8.02 UPDATING OF WEBPAGE WITH GUIDELINES ON USE OF CAMSIS VERSIONS WITH THE LIS AND LES STUDIES (AND SUPPLY OF FURTHER FILES TO THE LIS PROJECT MACHINES IN LUXEMBOURG). THE GUIDELINES PAGE, ACCESSED THROUGH THE LINK NEAR THE TOP OF THE NATIONAL VERSIONS PAGE, AND http://www.cardiff.ac.uk/socsi/CAMSIS/lisles.html NOW INCLUDES A LONGER DESCRIPTION OF THE HARMONISED FORMAT OF THE FILES STORED WITH THE PROJECTS, AND LINKS TO EXAMPLE COMMAND FILE SYNTAX FOR ACCESSING AND USING THE CAMSIS SCORE FILES IN THE FORMAT NECESSARY FOR THE LIS AND LES PROJECTS. --------------------------------------------------- 2.8.02 ADDITION OF A ZIP ARCHIVE WHICH SHOWS APPROXIMATE CAMSIS SCORES FOR UK SOC 2000 UNITS (LINKED FROM THE 'VERSIONS' PAGE). THESE SCORES ARE DERIVED FROM THE SCORES GIVEN TO SOC90 UNITS AND ARE A TEMPORARY MEASURE PROVIDED UNIL A SET OF CAMSIS SCORES IS FORMALLY DERIVED FOR SOC 2000 UNITS USING THE UK 2001 CENSUS SARS (EXPECTED AUTUMN 2002). --------------------------------------------------- 29.7.02 SOME MINOR ADDITIONS (ADDITION OF SPSS SYNTAX FILES SHOWING LINEAR RECODES FROM OCCUPATIONAL UNITS TO CAMSIS SCORES) TO A NUMBER OF THE DOWNLOADABLE ARCHIVES : -BRITAIN 1971, 1991, GERMANY 1991, 1995, IRELAND 1996, SWITZERLAND 1995, SWEDEN 1990, TURKEY 1990 --------------------------------------------------- 3.7.02 ADDITION OF LINK FROM FRONTPAGE OF SITE, TO DOWNLOAD A PAPER WHICH AMOUNTS TO AN OVERVIEW OF THE CAMSIS PROJECT. THE PAPER IS BEING GIVEN TO THE ISA RC20 MEETING, BRISBANE, JULY 12 2002. THE FULL TITLE OF PAPER IS: National Contexts and Cross-National Comparisons of Structures of Social Stratification Ken Prandy Paul S. Lambert Manfred Max Bergman ----------------------------------------------------- 27.5.02 BRITAIN 1971 CAMSIS INDEX FILES VERSION 1.0 DOWNLOADABLE, FOLLOW LINK FROM NATIONAL VERSIONS PAGE. FILES FOR OPCS 1970 SOC UNITS, SCALE CONSTRUCTED USING 1971 CENSUS SUBSAMPLE DATA. FURTHER DETAILS AND DOCUMENTATION STILL TO BE ADDED (ALSO SEE THE README.TXT FILE IN THE DOWNLOADABLE ARCHIVE). --------------------------------------------------- 20.5.02 TURKEY 1990 CAMSIS INDEX FILES VERSION 1.0 DOWNLOADABLE, FOLLOW LINK FROM NATIONAL VERSIONS PAGE. FILES FOR ISCO-68 UNITS, SCALE CONSTRUCTED FROM 1990 LABOUR FORCE SURVEY DATA. FURTHER DETAILS AND DOCUMENTATION STILL TO BE ADDED (ALSO SEE THE README.TXT FILE IN THE DOWNLOADABLE ARCHIVE). ----------------------------------------------------- 14.5.02 ADDITION OF FILEs, TO THE UK 1991 V1.0 CAMSIS ARCHIVE, AND THE USA 1990 V1.0 CAMSIS ARCHIVE, WHICH LINKS THE DERIVED CAMSIS SCALE SCORES WITH ISCO-88 OCCUPATIONAL UNITS. ---------------------------------------------------- 13.5.02 ADDITION OF PAGE, intragenmobility.html , TO TOP DIRECTORY OF SITE. THIS DESCRIBES A PRELIMINARY INVESTIGATION RELATED TO THE CAMSIS PROJECT WHERE DATA ON INTRA-GENERATIONAL JOB TRANSITIONS WAS USED AS AN ALTERNATIVE POSSIBLE INDICATOR OF SOCIAL DISTANCE BETWEEN OCCUPATIONS. ----------------------------------------------------- 30.4.02 ADDITION OF A FILE, TO THE IRISH 96 V1.0 CAMSIS ARCHIVE, WHICH LINKS THE CSO-96 DERIVED CAMSIS SCALE SCORES WITH ISCO-88 OCCUPATIONAL UNITS. ---------------------------------------------------- 29.4.02 RE-RELEASE OF GERMAN CAMSIS INDEX SCORE ARCHIVE, AS VERSION 1.1. MINOR DIFFERENCES FROM PRECEDING VERSION 1.0 : CHANGE IN LABELLING ON EXCEL FILES; CHANGE IN IMPUTATION METHODS USED TO ASSIGN SCORES TO NON-REPRESENTED OCCUPATIONS ON THE BASIS OF THEIR SUBGROUP SHARERS' MEAN VALUES. --------------------------------------------------- 29.4.02 IRELAND 1996 CAMSIS INDEX FILES VERSION 1.0 DOWNLOADABLE, FOLLOW LINK FROM NATIONAL VERSIONS PAGE. FILES FOR IRISH CSO UNITS, SCALE CONSTRUCTED FROM 1996 CENSUS DATA. FURTHER DETAILS AND DOCUMENTATION STILL TO BE ADDED (ALSO SEE THE README.TXT FILE IN THE DOWNLOADABLE ARCHIVE). --------------------------------------------------- 24.4.02 SWEDEN 1990 CAMSIS INDEX FILES VERSION 1.0 DOWNLOADABLE, FOLLOW LINK FROM NATIONAL VERSIONS PAGE. FILES FOR SWEDISH NYK(85/90) UNITS, SCALE CONSTRUCTED FROM 1990 CENSUS DATA. FURTHER DETAILS AND DOCUMENTATION STILL TO BE ADDED (ALSO SEE THE README.TXT FILE IN THE DOWNLOADABLE ARCHIVE). --------------------------------------------------- 24.4.02 USA 1990 CAMSIS INDEX FILES VERSION 1.0 DOWNLOADABLE, FOLLOW LINK FROM NATIONAL VERSIONS PAGE. FILES FOR US-SOC90 UNITS CONSTRUCTED FROM US 1990 CENSUS DATA. FURTHER DETAILS AND DOCUMENTATION STILL TO BE ADDED (ALSO SEE THE README.TXT FILE IN THE DOWNLAODABLE ARCHIVE). --------------------------------------------------- 23.4.02 UK 1991 CAMSIS INDEX FILES VERSION 1.0 DOWNLOADABLE, FOLLOW LINK FROM NATIONAL VERSIONS PAGE. FILES FOR SOC90 UNITS CONSTRUCTED FROM UK 1991 CENSUS DATA. FURTHER DETAILS AND DOCUMENTATION STILL TO BE ADDED. --------------------------------------------------- 22.4.02 GERMAN CAMSIS INDEX FILES VERSION 1.0 DOWNLOADABLE, FOLLOW LINK FROM 'NATIONAL VERSIONS' PAGE. FILES FOR ISCO-88 AND GERMAN 'KLDB' BASE UNITS AVAILABLE. FURTHER DOCUMENTATION - SCALE CONSTRUCTION REPORT, ANALYIS FILES, USAGE NOTE - NOT YET ADDED. --------------------------------------------------- 19.4.02 ADDITION OF A PAGE "OCCUPATIONAL UNIT HANDLING", WHICH CONTAINS A SELECTION OF NOTES, LINKS AND DOWNLOADABLE FILES CONCERNING HANDLING OCCUPATIONAL TITLE UNIT INFORMATION IN THE VARIOUS CAMSIS COUNTRIES --------------------------------------------------- 4.4.02 SWISS CAMSIS INDEX FILES VERSION 2.0 DOWNLOADABLE, FOLLOW LINK FROM 'NATIONAL VERSIONS' PAGE -------------------------------------------------- -------------------------------------------------- ------------------------------------------------ 4.4.02 [Paul Lambert] REVISION OF SCALE CONSTRUCTION PROCEDURE, AND WEBPAGE USER NOTES, IN RELATION TO THE SCALING OF SCORES BETWEEN NATIONAL VERSIONS AND GENDER GROUPS. SUMMARY : RESCALING OF RELEASED SCORES REVISED : RANGE 1-99, MEAN 50, STANDARD DEVIATION 15, ALL VERSIONS PREVIOUS : RANGE 1-999, RANGE SCALED FOR EACH VERSION SEPARATELY Our intention in constructing the CAMSIS scales is to produce derived scale scores which are a linear transformation of the 'raw' scores obtained from RC-II association models (or Correspondence Analysis models). In the early release of these webpages, and with regard to the Swiss scores made available from these webpages until 4.4.02, we achieved this rescaling by a method of 'range scaling', ie fixing the minimum and maximum values of the raw scores to translate directly to a minimum CAMSIS value of 1, and maximum of 999. Details on how and why this was chosen were also described on the project webpages. A drawback of this method, however, is that there is no guarantee, in using the range scaling, that scores from different versions (for instance between different national versions, and between gender groups), based on separate sets of raw scores, would have equivalent mean values. This is particularly significant when comparing scores between genders, where if one or two 'extreme' occupational scores are particularly _differentially_ influential between genders, then the male and female derived scale ranges could be quite different. Indeed, in the example for Switzerland, we saw that the male scores had an average of approx 350 in a nationally representative population, but the female scores an average of approx 600. It should be noted that this property is NOT theoretically inconsistent - the male and female scores are meant to refer to separate occupational structures, as are the sets of scores for different national versions. Furthermore in some ways the difference is an asset, as it serves to reiterate the above to users. Nevertheless we subsequently felt that the scores could be much more consistently communicated by setting other national level distribution parameters (ie the mean and standard deviations) to be fixed between all versions. Since 4.4.02 therefore we have replaced the range standardisation with a mean standardisation, namely that all scale versions should have mean 50 and standard deviation 15 (we have also reduced the score magnitudes by a factor of ten in order to increase comparability with other occupational scales). Thus the magnitude of all score values can be interpreted as relative to the same baseline across versions (that baseline itself being the mean value on the nationally representative census/sample dataset used for scale construction). Additionally, the analysis of mixed gender populations is made less complicated (for more details see the CAMSIS webpage notes on the use of the downloadable index files). Since the revision, the use of a derived scale which represents the male scores for men and the female scores for women is more defensible. A possible drawback with this strategy of mean standardisation, however, is that we cannot be sure that all 'raw' score values will be translated into scores within our desired range (which is now from 1-99). This possibility affects, by definition, few cases, but to overcome it we have adopted the strategy of truncating the mean standardised values, so that scores below 1 or above 99 are truncated to exactly 1 or 99 respectively. Notes relating to each specific CAMSIS version will be used to highlight any cases where such a truncation may possibly have a non-trivial influence on the scale scores. This revision, therefore, affects the values of the Swiss scale scores in the CAMSIS archive (and as available for the LIS and LES datasets), and also the descriptions of the scale construction procedure and the guidelines on the use of the CAMSIS scale scores, both found on the project webpages. --------------------------------------------------- 28.3.02 SWISS CAMSIS INDEX FILES VERSION 1.0 DOWNLOADABLE, FOLLOW LINK FROM 'NATIONAL VERSIONS' PAGE -------------------------------------------------- -------------------------------------------------- --------------------------------------------------- THESE NOTES ARE UPDATED BY KEN PRANDY AND PAUL LAMBERT