I'm conducting a comparative analysis of state economies in India, and for Kerala, I'm having difficulty assessing the sustainability of its remittance-driven growth model. What are the key indicators and data sources I should use to evaluate this?

As part of my master's thesis, I'm comparing economic models across Indian states. For Kerala, I've reviewed GDP data from government reports, but I need to dig deeper into remittances' long-term impact. I've tried using Reserve Bank of India (RBI) bulletins and Kerala Migration Surveys, but they seem limited in scope for sustainability analysis. Are there more comprehensive datasets or methods, like econometric models, that I should consider?