Research History 213 Government policy 177 Finance 141 Medicine 112 Law and legislation 106 Evaluation 98 more ... Technological innovations 90 Social aspects 85 Social sciences 83 Education 82 Methodology 80 Prevention 76 Appropriations and expenditures 67 Science 58 Study and teaching 57 Moral and ethical aspects 53 Climatic changes 46 Treatment 46 Science and state 44 Cancer 42 Management 42 Study and teaching (Higher) 42 Universities and colleges 40 Federal aid to medical research 39 Economic aspects 37 Power resources 33 Political aspects 32 Federal aid to research 31 Health aspects 31 less ...