Difference between short run demand and long run demand?

Answer 1

In microeconomics, the long run is the conceptual time period in which there are no fixed factors of production, as to changing the output level by changing the capital stock or by entering or leaving an industry. The long run contrasts with the short run, in which some factors are variable and others are fixed, constraining entry or exit from an industry. In macroeconomics, the long run is the period when the general price level, contractual wage rates, and expectations adjust fully to the state of the economy, in contrast to the short run when these variables may not fully adjust

Answer 2

Short Run is defined as the decision period that takes into consideration that during the time-span of implementation of the decision there would be some constraints where somethings would remain constant. Ex: In short run you cannot have a huge plant size, because it would take capital investment and time to put them together, the decisions taken, this constraint into consideration is the short run decision.

Long Run is when all decision variables are completely flexible, that from the above example when capital accumulation has been enough to adjust plant size instantaneously.

Answer 3

The short run is a quick-happening effect, and the long run is a long term effect.