Understanding WS-PC Model: Long, Short, and Medium Runs

In the short run of the Wage Setting-Price Curve model, prices and wages demonstrate a unique characteristic: they're sticky.Price stickiness means that prices don't immediately adjust to changes in economic conditions.When aggregate demand increases, firms initially respond by adjusting production levels rather than prices.This creates a horizontal Wage Setting-Price Curve in the short run, showing that inflation remains stable despite changes in unemployment.As demand shifts, we see movement along this horizontal curve, with unemployment changing while inflation stays relatively constant.Firms continue to adjust production and employment levels to meet changing demand, while prices remain sticky in the short run.These adjustments create temporary equilibrium points along the horizontal curve, representing different levels of unemployment with stable inflation.This short-run behavior sets the stage for longer-term adjustments in the economy.In the long run, all prices and wages become fully flexible and can adjust completely to economic changes.The economy naturally gravitates toward its natural rate of unemployment, shown here by the vertical line.At this natural rate, actual inflation equals expected inflation, creating a stable equilibrium point.If unemployment deviates from the natural rate, economic forces will push it back toward equilibrium.Any attempt to maintain unemployment below the natural rate results in continuously accelerating inflation.This creates an inflationary spiral, as wages and prices chase each other higher and higher.In the medium run, the economy undergoes a transition as expectations and prices begin to adjust.The initial WS-PC curve reflects a period where some price and wage stickiness remains.During this phase, several key economic features characterize the adjustment process.The economy starts from a point of higher inflation and unemployment different from the natural rate.As expectations adjust and prices become more flexible, the WS-PC curve gradually shifts.The economy follows an adjustment path toward its long-run equilibrium.During this adjustment process, expectations play a crucial role in determining how quickly the economy moves toward equilibrium.Eventually, the WS-PC curve becomes steeper as the economy approaches its long-run equilibrium position.