This paper considers a new class of heteroskedasticity and autocorrelation consistent (HAC) covariance matrix …

This paper is concerned with the estimation of covariance matrices in the presence of heteroskedasticity and …

heteroskedasticity. Contrary to Santos Silva and Tenreyro (2006), the results of a simulation study indicate that the Pseudo Poisson … concerning the pattern of heteroskedasticity is, in most cases, rejected by the data and PPML estimates are outperformed by OLS …