I am citing here from the conclusions of that book (better, have a look yourself): Overall, we found sanctions to be at least partially successful in 34 percen

I am citing here from the conclusions of that book (better, have a look yourself): Overall, we found sanctions to be at least partially successful in 34 percent of the cases that we documented. By our standards, successful cases are those with an overall success score of 9 or higher. We emphasize that a score of 9 does not mean that economic sanctions achieved a foreign policy triumph. It means only that sanctions made a modest contribution to a goal that was partly realized, often at some political cost to the sender country. Yet in many cases, it is fair to say that sanctions were a necessary component of the overall campaign that focused primarily on the projection of military force. Second, we classify some sanctions as failing to produce a real change in the target’s behavior when their primary if unstated purpose—namely, demonstrating resolve at home, signaling disapproval abroad, or simple punishment—may have been fully realized.