This paper surveys the measurement of trade costs - what we know, and what we don't know but may usefully attempt to find out. Partial and incomplete data on direct measures of costs go together with inference on implicit costs from trade flows and prices. Total trade costs in rich countries are...

Several have shown that models with perfect international capital mobility can generate high correlations between aggregate savings and investment, as observed in the data. In this paper we decompose aggregate saving and investment into their two component parts, private and public. This leads...