What is the difference between short-run equilibrium and long-run equilibrium in the goods and services market?

Short-run equilibrium occurs at prices where aggregate demand and short-run aggregate supply intersect. Here the aggregate quantity demanded equals the aggregate quantity supplied. An economy can be in short-run equilibrium without being in long-run equilibrium, but if it is in long-run equilibrium, it must also be in short-run equilibrium. Long-run equilibrium occurs when decision makers correctly anticipated prices when their decisions were made. Thus, an economy in short-run equilibrium will also be in long-run equilibrium only if actual prices were correctly anticipated.