This research has as main objective to determine the impact of public spending on private investment (displacement effect) in Peru in the period 1990: 01-2015: 04. This will have a clearer idea of the impact that may constitute public spending on private investment. If there is a complementary effect of public spending on private investment, we talk about crowding in; however, if government spending merely displace private investment talk about crowding out. the following problem arises: What is the impact of public spending on private investment in Peru, during the period 1990: 01-2015: 04? The hypothesis formulated indicates that public spending has an impact on the behavior of private investment in Peru, over the period 1990: 01-2015: 04. The methodology followed, both for information and for analyzing the data obtained, involved recourse to statistics provided by the Central Reserve ...