This paper evaluates the performance of alternative estimation methods for multiplicative and log models with heteroskedasticity. Contrary to Santos Silva and Tenreyro (2006), the results of a simulation study indicate that the Pseudo Poisson Maximum Likelihood estimator (PPML) is not always the...

This paper investigates whether Aid for Trade (AfT) improves export performance, i.e. does AfT lead to greater exports? Using panel data and panel quantile regression, our results suggest that overall AfT disbursements promote the export of goods and services mainly for the .50 and .75...

This paper investigates the trade effects of Turkey’s trade integration into the EU. To this end sectoral trade flows to the EU based on panel data from the period 1988 to 2002 are examined concentrating on Turkey's sixteen most important export sectors. Emphasis is placed on the role of price...