The study looked at how public and private investments affect economic growth in Zimbabwe from 1970 to 2014. They found that public investment has a bigger short-term impact on growth, but in the long run, private investment is more important. Infrastructure public investment helps private investment grow in the long run, while non-infrastructural public investment hinders it. To boost economic growth in Zimbabwe, it's suggested to reduce non-infrastructural public investment and focus on improving infrastructure public investment.