The gravity literature has focused on distance, borders and contiguity to measure geography's impact on trade. We add value to this literature in terms of data, method and assessment of effects. First, we expand existing geographical databases by adding topographical features. We supply novel...

The gravity literature has focused on distance, borders and contiguity to measure geography's impact on trade. We add value to this literature in terms of data, method and assessment of effects. First, we expand existing geographical databases by adding topographical features. We supply novel...