Many modelling issues and policy debates in macroeconomics depend on whether macroeconomic time series are best characterized as linear or nonlinear. If departures from linearity exist, it is important to know whether these are endogenously generated (as in, e.g. a threshold autoregressive...

The paper shows how increases in the inflation rate can cause the output growth rate to decrease by a lessor amount as the inflation rate rises. This is the so-called non-linearity in the inflation-growth effect. Our explanation helps show how model-based estimates of the inflation-growth effect...

Generalized method of moments (GMM) estimation of nonlinear systems has two important advantages over conventional maximum likelihood (ML) estimation: GMM estimation usually requires less restrictive distributional assumptions and remains computationally attractive when ML estimation becomes...