*  *  *  I am pleased to have the opportunity to be part of the Applied Physics Laboratory's commemoration of Black History Month. Your theme, "Celebrating Community: A Tribute to Black Technical, Educational, and Social/Civic Institutions," aptly highlights a number of the key building blocks that have enabled many African Americans to fulfill their personal dreams.
Repositories are well-established in some fields such as medicine, where the Cochrane Library or the McMaster Health Forum20 provide structured evidence on medical research, also by compiling meta-studies. Similarly, in the field of development economics, the International Initiative for Impact Evaluation (3ie) collects information on the effects of policies and programs in development economics.