The Economist:
Free exchange: Down to earth
1 October 2016
Furthermore, according to Swati Dhingra of the London School of Economics, gravity models do a good job of predicting actual trading relationships today.
This article was published in The Economist on October 1, 2016
Link to article here
Related links
Swati Dhingra webpage
Trade Programme webpage
Swati Dhingra CEP publications webpage