Michael Norman, JTF chief economist, provides a number of metrics to evaluate the effectiveness of the stimulus program (aka American Recovery Act). Each graph below has a horizontal axis ranging from March 2007 to March 2012. In addition Norman has indicated with an arrow the implementation of the stimulus program. To see a larger version of the graphs go to his pdf file referenced at the end of this post.
Norman, Michael. The U.S. Economy: Pre-Stimulus Post-Stimulus