Solving the Diamond–Mortensen–Pissarides model: A hybrid perturbation approach

Projection methods are deemed necessary to accurately solve various variants of the Diamond–Mortensen–Pissarides model used in business cycle research. This paper argues that hybrid perturbation, once combined with a non-linear change of variable, can provide an alternative, producing accurate solutions while retaining most of the simplicity of standard perturbation: Applying the method to the Hagedorn and Manovskii (2008) model, it delivers high accuracy and nearly identical business cycle moments as recent projection approaches.