Subsequently, variations in the proportion of immigrants across skill cells are used to assess the impact of immigration on labour market outcomes (see Annex 4.A1 for methodological details). One can imagine a broad range of other meaningful labour market indicators which can be similarly analysed, including unemployment or underemployment rates, vulnerable employment rates, wages, or hours worked. The degree to which these indicators can be analysed depends on the quality and availability of data, which in the case of Thailand is challenging. As unemployment data were not recorded in the 2010 Thai census wave, it was not possible to look at immigration impacts on unemployment.