A line drawn through points A, B, and C traces out the short-run aggregate supply curve SRAS. Short-Run Aggregate Supply (SRAS) Short-run aggregate supply refers to the total production of goods and services available in an economy at different price levels while some production factors and resources are fixed. If aggregate demand decreases to AD3, in the short run, both real GDP and the price level fall. What relationship is shown by the aggregate supply curve? In the short-run, the aggregate supply is graphed as an upward sloping curve. Short Run Aggregate Supply (SRAS) SRAS slopes upwards because as prices increase, it becomes more profitable for firms to increase their output and new firms start producing. Reasons why Short Run Aggregate Supply shifts: Shifts in the short-run aggregate supply curve are much rarer than shifts in the aggregate demand curve. Producers do this by increasing the utilization of existing resources to meet a higher level of aggregate demand. This simply means that output supply has no relation to the level of prices and costs. This means certain capital-intensive resources are pretty much impossible to achieve in the short run. In the short run, firms will respond to higher demand by raising both production and prices. These factors are enhanced by the availability of financial capital. SRAS ends when input prices increase the same percentage as, or in proportion to, price level increases. The short-run aggregate supply equation is: Y = Y* + α(P-P e ). The Bottom Line. Short-run aggregate supply (SRAS) is the measure of aggregate supply that begins when price levels of goods and services increase but input prices, such as wages and raw materials, remain constant. If aggregate demand increases to AD2, in the short run, both real GDP and the price level rise. It's driven by the four factors of production: labor, capital goods, natural resources, and entrepreneurship. Thus, as output increases the price increases at a faster pace giving us a short run aggregate supply curve which is upward sloping. In the equation, Y is the production of the economy, Y* is the natural level of production of the economy, the coefficient α is always greater than 0, P is the price level, and P e is the expected price level from consumers. To sum up, aggregate supply will differ from potential output in the short run because of inflexible elements of costs. But, when a supply shock occurs, the short-run aggregate supply curve shifts without prompting from the aggregate demand curve. Aggregate supply is the goods and services produced by an economy. Definition: Aggregate supply is the total value of goods and services produced in an economy over a given period of time. In the short run, rising prices (ceteris paribus) or higher demand causes an increase in aggregate supply. 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