Claiming is a major expense and serious factor. And a major factor in the cost of acquiring library serials. Readmore's business is weighted toward the medical field, so medical pub- lishers and titles show up prominently in the charts. There are also a number of weekly publications in the titles list, along with journals of lesser frequency. I'd like to see in addition something that would balance out the size of publisher and the frequency of journals.
Timing is the problem.
In essence,the dialogue and educational effort that must take place must be directed to a vast, heterogeneous audience of publishers around the world. It should be expected that results from this group will take time. This implies added risk for both the publisher and the library as currency situations might be drastically different at the time the library is invoiced in October from what they were when the publisher set the price and exchange rate several months earlier. In short, earlier prices might be higher and will involve trade-offs from year to year due to currency fluctuation that occurs long after prices have been set. For example, if publishers set rates in June and the British pound happens to be especially strong at the time, US libraries will pay more for British journals than they would have if the price were set in September when the dollar was stronger.