“…The model reveals the relationships between economic variables as a closed trajectory in the u−v phase space [26]. After Goodwin [28] published his basic model, many studies have been carried out that test the validity of the model [27], trying to develop the model by extending its basic assumptions or adding theoretical contributions [28,29,30,31,32,33,34,35,48,50], and examining the empirical results of the model [26,36,37,38,39,40,51,57,58].…”