Abstract
The relationship between public spending and national income has been the subject of research for many years in the economic literature within the framework of various theories and perspectives. In the study, this relationship is analyzed within the framework of Keynes and Wagner’s theories for the Turkish economy. Granger causality test and Vector autoregression (VAR) model are used to determine this relationship and the current theory. In the study in which 1998-2018 period data is used, it is concluded that there is no causal relationship between the variables. On the other hand, according to the impact-response analysis in the established VAR model, shocks in public expenditures are determined to have an impact on GDP for approximately five periods. In addition, according to the results of variance decomposition, it is seen that public expenditures are an important factor in explaining GDP. The findings reveal that the Keynesian hypothesis is valid for the Turkish economy.