The paper reviews recent evidence suggesting that computer skills by themselves do not command a wage premium. The authors review the literature and use data from a survey of higher education graduates in Vietnam. Results support the unobserved heterogeneity explanation for computer wage premiums.
Link
http://www-wds.worldbank.org/servlet/WDSContentServer/WDSP/IB/2003/04/23/000094946_03040404262958/Rendered/PDF/multi0page.pdf