Stats

Some additional research:

http://www.poea.gov.ph/stats/2008_stats.pdf

http://www.adb.org/Documents/ERD/Working_Papers/Wp112.pdf

http://www3.pids.gov.ph/ris/dps/pidsdps0040.pdf

http://www-wds.worldbank.org/external/default/WDSContentServer/WDSP/IB/2002/01/07/000094946_01121904064580/Rendered/PDF/multi0page.pdf

http://www.idrc.ca/uploads/user-S/10951172131mrp50.pdf

http://mpra.ub.uni-muenchen.de/16553/1/MPRA_paper_16553.pdf