Greg Mankiw, David Romer, and David Wiel's "A Contribution to the Empirics of Economic Growth"
www.econ.nyu.edu/user/debraj/Courses/Readings/MankiwRomerWeil.pdf
Many economists think the Solow Growth Model is of limited use. But does the Solow model give "...the right answer to the questions it is designed to address?"
What are some things that the Solow model does not explain that we might like explained? (ie what would it take to make the Solow model "a complete theory of growth"?)