An important question is whether underdeveloped countries will converge to the per-capita income level of developed countries. Economists have used the disequilibrium adjustment property of growth models to justify the view that convergence should occur. Unfortunately, the empirical literature...

Lucas (1976) criticized Keynesian models because of parametric instability. For many economists, the "Lucas critique" provided a reason to replace the Keynesian approach with equilibrium models of the business cycle. One example of the equilibrium approach is the Real Business Cycle (RBC) model....