Friday, March 30, 2007
Tweet[IWS] BLS: OCCUPATION INDICATOR STRENGTH as SKILL PROXY [26 March 2007]
IWS Documented News Service
_______________________________
Institute for Workplace Studies----------------- Professor Samuel B. Bacharach
School of Industrial & Labor Relations-------- Director, Institute for Workplace Studies
Cornell University
16 East 34th Street, 4th floor---------------------- Stuart Basefsky
New York, NY 10016 -------------------------------Director, IWS News Bureau
________________________________________________________________________
BLS Working Paper 404
The Strength of Occupation Indicators as a Proxy for Skill [26 March 2007]
Alec Levenson and Cindy Zoghi (2007)
http://www.bls.gov/ore/abstract/ec/ec070030.htm
or
http://www.bls.gov/ore/pdf/ec070030.pdf
[full-text, 39 pages]
Abstract:
Labor economists have long used occupation indicators as a proxy for unobserved skills that a worker possesses. In this paper, we consider whether inter-occupational wage differentials that are unexplained by measured human capital are indeed due to differences in often-unmeasured skill. Using the National Compensation Survey, a large, nationally- representative dataset on jobs and ten different components of requisite skill, we compare the effects on residual wage variation of including occupation indicators and including additional skills measures. We find that although skills do vary across 3-digit occupations, occupation indicators decrease wage residuals by far more than can be explained by skill differentials. This indicates that "controlling for occupation" does not equate to controlling for skill alone, but also for some other factors to a great extent.
Additionally, we find that there is considerable within occupation variation in skills, and that the amount of variation is not constant across skill levels. As a result, including occupation indicators in a wage model introduces heteroskedasticity that must be accounted for. We suggest that greater caution be applied when using and interpreting occupation indicators as controls in wage regressions.
______________________________
This information is provided to subscribers, friends, faculty, students and alumni of the School of Industrial & Labor Relations (ILR). It is a service of the Institute for Workplace Studies (IWS) in New York City. Stuart Basefsky is responsible for the selection of the contents which is intended to keep researchers, companies, workers, and governments aware of the latest information related to ILR disciplines as it becomes available for the purposes of research, understanding and debate. The content does not reflect the opinions or positions of Cornell University, the School of Industrial & Labor Relations, or that of Mr. Basefsky and should not be construed as such. The service is unique in that it provides the original source documentation, via links, behind the news and research of the day. Use of the information provided is unrestricted. However, it is requested that users acknowledge that the information was found via the IWS Documented News Service.
Stuart Basefsky
Director, IWS News Bureau
Institute for Workplace Studies
Cornell/ILR School
16 E. 34th Street, 4th Floor
New York, NY 10016
Telephone: (607) 255-2703
Fax: (607) 255-9641
E-mail: smb6@cornell.edu
****************************************
_______________________________
Institute for Workplace Studies----------------- Professor Samuel B. Bacharach
School of Industrial & Labor Relations-------- Director, Institute for Workplace Studies
Cornell University
16 East 34th Street, 4th floor---------------------- Stuart Basefsky
New York, NY 10016 -------------------------------Director, IWS News Bureau
________________________________________________________________________
BLS Working Paper 404
The Strength of Occupation Indicators as a Proxy for Skill [26 March 2007]
Alec Levenson and Cindy Zoghi (2007)
http://www.bls.gov/ore/abstract/ec/ec070030.htm
or
http://www.bls.gov/ore/pdf/ec070030.pdf
[full-text, 39 pages]
Abstract:
Labor economists have long used occupation indicators as a proxy for unobserved skills that a worker possesses. In this paper, we consider whether inter-occupational wage differentials that are unexplained by measured human capital are indeed due to differences in often-unmeasured skill. Using the National Compensation Survey, a large, nationally- representative dataset on jobs and ten different components of requisite skill, we compare the effects on residual wage variation of including occupation indicators and including additional skills measures. We find that although skills do vary across 3-digit occupations, occupation indicators decrease wage residuals by far more than can be explained by skill differentials. This indicates that "controlling for occupation" does not equate to controlling for skill alone, but also for some other factors to a great extent.
Additionally, we find that there is considerable within occupation variation in skills, and that the amount of variation is not constant across skill levels. As a result, including occupation indicators in a wage model introduces heteroskedasticity that must be accounted for. We suggest that greater caution be applied when using and interpreting occupation indicators as controls in wage regressions.
______________________________
This information is provided to subscribers, friends, faculty, students and alumni of the School of Industrial & Labor Relations (ILR). It is a service of the Institute for Workplace Studies (IWS) in New York City. Stuart Basefsky is responsible for the selection of the contents which is intended to keep researchers, companies, workers, and governments aware of the latest information related to ILR disciplines as it becomes available for the purposes of research, understanding and debate. The content does not reflect the opinions or positions of Cornell University, the School of Industrial & Labor Relations, or that of Mr. Basefsky and should not be construed as such. The service is unique in that it provides the original source documentation, via links, behind the news and research of the day. Use of the information provided is unrestricted. However, it is requested that users acknowledge that the information was found via the IWS Documented News Service.
Stuart Basefsky
Director, IWS News Bureau
Institute for Workplace Studies
Cornell/ILR School
16 E. 34th Street, 4th Floor
New York, NY 10016
Telephone: (607) 255-2703
Fax: (607) 255-9641
E-mail: smb6@cornell.edu
****************************************
# posted by SBasefsky : 4:40 PM
