I want to compare different approaches to developing and retaining talent on an individual and group level? Could you give me some pointers?

Firstly, this question is requiring a comparison of different approaches to developing and retaining talent on an individual and group level. There are many different approaches - some more obviously suitable at an individual rather than group level - to developing and retaining talent. Approaches to developing talent (which in themselves are likely to support retention!) include: training and development, lateral moves, job enrichment, etc. Approaches to retaining talent include: flexible working and work-life balance, fair and equitable reward, and so on. For example compare formal training with lateral moves, and then go on to compare flexible working with fair reward.