Contact Details

I welcome corrections to errors in any of the data for which I'm responsible and mistakes I've made in putting it together. And, of course, I welcome contributions from readers who have data to offer me. However, much as I would enjoy doing so, I don't have the time to engage in email exchanges about users' own research. With the qualification that I don't promise to answer all (or even many) emails, if you've got a correction to provide, my email address is: