... Emerald Publishing Limited Licensed re-use rights only Economics Panel data European Union Gravity model Negative binomial regression South Africa Wine industry The export performance of South Africa’s wine industry has improved over the years, with a growth rate in value of 153...

... is a fortified wine only produced in Portugal. In the period 2006-2014, an extended gravity model is applied to data on the exports of the top 20 importing countries, accounting for 94 per cent of total exports. The authors base their empirical strategy on the Hausman–Taylor estimator (1971), overcoming...