For example, in 1956, 65,000 Mexicans legally entered the United States as documented migrants while another 445,000 came as guest workers.
The participants reported being documented migrants.
To conclude, their socioeconomic position can be considered worse than that of documented migrants.
While several studies found undocumented migrants worked in poorer conditions than documented migrants, only one analysed potential health effects in detail (Sousa et al. 2010).
A Dutch providers survey found undocumented migrants had significantly more skin and digestive issues than documented migrants (Van Oort et al. 2001).
Research on documented migrants in the Netherlands often focuses on the most prominent ethnic minority populations, that is, Turkish and Moroccan labour migrants.
There are an estimated 2.1 million documented migrant workers like Bhandari in Malaysia, many of them hired through third-party labour supply companies who recruit foreign workers from Nepal, Indonesia, India and Bangladesh to drive Malaysia's industrial boom.
Most participants were Caucasian, and although not adequately documented, migrant parents and children were relatively underrepresented.
But, as Human Rights Watch has documented, many migrants who get caught while crossing the border are returning to family with whom they have built lives in the US.
Yet the high-risk behavior that various surveys have documented among many Mexican migrants worries researchers.
