The study looked at government spending on health, education, and capital investment in Nigeria and Angola to see how it affects economic growth. They found that there is no long-term relationship between these types of spending and economic growth. However, spending on health does lead to economic growth in both countries, supporting Wagner's theory. Spending on education also boosts economic growth in Angola, following both Wagner's theory and Keynes's hypothesis. Lastly, spending on capital investment helps economic growth in both Nigeria and Angola, confirming Keynes's hypothesis.