Ivan Cherkashin, Svetlana Demidova, Susumu Imai, and Kala Krishna got their hands on the 3,032 submissions sent to the Journal of International Economics between 1995 and 2004. The product is a NBER working paper on how the journal operates.
We learn that the acceptance rate is around twenty percent, but falling fast. And non-native English speakers have more difficulty publishing. These interesting tidbits are scattered throughout the paper.
An obvious trend is the decrease in the share of submissions from the authors affiliated with the US universities from 50% in 1995 to 37% in 2004 and a corresponding increase in such number for researchers from the European universities from 12% to 28%, suggesting that at least in International Economics, the US may well be losing ground.
I should note that the bottom line is that the JIE does a pretty good job.