D90, D91, C93, I12, I1, D15, D62, D64, D81, I18
I Health, Education, an Welfare; J Labor and Demographic Economics
C93, I15, I18, O12
I21 Analysis of Educational, I25 Education and Economic Development, I28 Government Policy
I12; J15; I18
I18, I31, C93, O17, R23, R28
O - Economic Development, Innovation, Technological Change, and Growth, I12 (Health Behavior), D90
I18, I15, I12, I32, I38
D83 Search, Learning, Information and Knowledge, I12 Health Behavior, K32 Energy, Environmental, Health, and Safety Law
C93, I12, I18, D91