Final answer:
An increase in aggregate demand in the Phillips curve model results in a shift to the right of the short-run Phillips curve.
Step-by-step explanation:
An increase in aggregate demand within the Phillips curve model translates to a shift to the right of the short-run Phillips curve. This shift is associated with lower unemployment and higher inflation rates in the short run. The Phillips curve represents the trade-off between inflation and unemployment, and a movement to the right indicates that for a given level of inflation, unemployment has decreased.