C93 Field Experiments,D12 Consumer Economics Empirical Analysis,Q53 Solid Waste • Recycling Q58
D12, D83, P16, Q11, Q13, Q18, Z18
D03, D12, D91, L94, Q41, C93
D12, G22, L81. C93
D12, Q48, Q41, H23
I21 — Analysis of Education O33 — Technological Change: Choices and Consequences; Diffusion
I21 – Analysis of Education: Education and Economic Development I28 – Education: Government Policy I31 – General Welfare, Well-Being
D12, D81, D91
Labor and Demographic Economics Education and Research Institutions
Q41, D12, Q48, O13, C93