Price Stickiness: The tendency for prices to remain unchanged, even in the face of changes in demand or supply conditions, due to various factors such as menu costs, customer perceptions, and long-term contracts.
Nominal Rigidities:The inability or unwillingness of firms to adjust nominal prices, wages, or other nominal variables in response to changes in economic conditions, often due to menu costs and other factors.
Keynesian Economics:An economic theory that emphasizes the role of aggregate demand in determining economic output and the presence of market imperfections, such as price and wage rigidities, that can lead to suboptimal economic outcomes.