Thailand, as a result of its own successful anti-poverty measures, actually imports regional poverty from bordering Laos, Burma and Cambodia. It is estimated that there are between 1.8 million and 3 million documented and undocumented workers and their families in the country. Therefore it is necessary to measure poverty in wider terms than just national borders – otherwise the failure of one country's anti-poverty measures could, through encouraging migration, result in an apparent fall in poverty rates and praise for their policies.