Certificate courses in Public / Social Policy and Labour Studies

Good Day sir/ma, I will like to have updated information on short certificate courses in Pubilc / Social Policy for Public servants from Africa especially Nigeria. This is to enable me to understand the methods of policy formulation, implementation as well as assessment in your country. Over the years there has been a problem with formulating/ implementing proper policies to solve the litanies of problems facing Nigeria. This the desire for this course.
Thank you