In a new article from the Bulletin of Indonesian Economic Studies, Chris Manning and Devanto S. Pratomo looks the labor market outcomes for migrants and non-migrants, particularly if they end up in the informal sectors. The link to the article is here, but requires access. Here are the findings from the abstract:
We find that long-term migrants (LTMs) tend to gravitate to the small-business sector and to jobs with regular wages, whereas recent and very recent migrants are more likely to work in the informal sector. Our findings on the labour-market outcomes of successive generations of migrants are less conclusive. While a larger proportion of LTM children than that of their parents work in the formal sector, the children of migrant heads of households are less likely than those of non-migrants to find formal-sector jobs. We also find that distortionary labour-market regulations appear to diminish the overall benefits of migration.