An unanticipated increase in aggregate demand initially increases the price level and real output, and then reduces short-run aggregate supply, bringing the economy back to the full-employment level of output.
- The new classical economists argue that an unanticipated increase in aggregate demand first increases the price level and real output, and then reduces short-run aggregate supply such that the economy returns to the full-employment level of output.
- In the long run, the increase in price level puts downward pressure on the price level, and wages and prices adjust to their new levels.
- The short-run Keynesian aggregate supply curve shifts to the right, and the economy returns to its potential GDP.
- Therefore, the correct option is: increases the price level and real output, and then reduces short-run aggregate supply such that the economy returns to the full-employment level of output.