The study found that in a model with sticky prices and strategic complementarities, the best price is only optimal for inflation rates below 5.5% per year. This is lower than recent average inflation rates. Additionally, the slope of the Phillips curve in this model decreases as inflation rises, which goes against the idea that Phillips curves are flatter in low-inflation situations. Using endogenous price stickiness instead of the Calvo pricing model can help address these issues.