rgonzalez

hvb4096:

First of all, shifts are generally a concept of the long-run, while movements are generally concepts of the short-run.

Now, the website that you referenced above, explains and graphically depicts exactly what I am saying. The short-run supply curve shifts to the right (but is still upward sloping to the right) and the long-run supply curve is a horizontal line (perfectly elastic).

I think you may have the long-run average cost curve and the long-run supply curve confused. But, at NO point, does the supply curve slope down and to the right (not the short-run nor the long-run).