How can Ghanaians living abroad contribute to our national development

Ghana abounds not only in natural resources but also human capital. Unfortunately (or should we say 'fortunately') a good number of these professionals live and work outside Ghana. It is on record that remittances from Ghanaians living abroad forms a significant contribution to our GDP however, what the nation is missing is how to tap into the skills and expertise of our professionals living abroad. The question is, 'How can Ghana maximise the potential of these Ghanaians living abroad? Your say please!!!!