Economics Asian history 2 Ethnic studies 2 Regional studies 2 Agglomeration 1 Asset pricing model 1 Business & management 1 COVID crisis 1 China 1 Corporate crime 1 Corporate finance 1 Corporate governance 1 Costs 1 Data envelopment analysis 1 Dynamic asset pricing model 1 Eastern China 1 Eco-efficiency evaluation 1 Ecological efficiency 1 Ecological protection 1 Economic and social effects 1 Economic development 1 Economic uncertainty 1 Efficiency 1 Environmental regulations 1 Financial markets 1 Highway & traffic engineering 1 Information technology. Information systems 1 Labor market. Labor supply. Labor demand, Including unemployment, manpower policy, occupational training, employment agencies 1 Labor systems 1 Latent Dirichlet Allocation topic model 1