·Technology shocks Proponents of RBC theory argue that the strong correlation between output growth and Solow residuals is evidence that productivity shocks are an important source of economic fluctuations. Critics note that the measured Solow residual is biased,appearing more cyclical than the true,underlying technology.• Technology shocks • Proponents of RBC theory argue that the strong correlation between output growth and Solow residuals is evidence that productivity shocks are an important source of economic fluctuations. • Critics note that the measured Solow residual is biased, appearing more cyclical than the true, underlying technology