For the economy to rise substaintielly i believe that the countries must invest in prior in thhe human ressources and the standards of living of its population, by that i mean access to education, free healthcare, electricity, ..etc. Without that basics the economy can rise with a hight growth rate btu it cant be sustainable.. as we can see on the so Called African Lions ... i am afraid that those growth rate will not be for long.
And there is an indice for that the HDI The Human Developement Index that i think its a faire indication of how a country is developped in that regard.