Education -- Economic aspects -- Econometric models 2 Husband and wife -- Taxation -- United States -- Mathematical models 2 Marriage -- Economic aspects -- United States 2 Married people -- Taxation -- United States -- Mathematical models 2 Cell phones -- Caribbean Area -- Prices 1 Cell phones -- Economic aspects -- Caribbean Area 1 Cell phones -- Economic aspects -- Latin America 1 Cell phones -- Latin America -- Prices 1 Climatic changes -- Economic aspects -- Argentina 1 Climatic changes -- Economic aspects -- Brazil 1 Climatic changes -- Economic aspects -- Latin America 1 Climatic changes -- Government policy -- Argentina 1 Climatic changes -- Government policy -- Brazil 1 Climatic changes -- Government policy -- Latin America 1 Day care centers -- Economic aspects -- Argentina 1 Digital divide -- Caribbean Area 1 Digital divide -- Latin America 1 Economic development -- Effect of education on -- Econometric models 1 Education, Preschool -- Economic aspects -- Argentina 1 Emissions trading 1 Emissions trading -- Argentina 1 Emissions trading -- Brazil 1 Greenhouse gas mitigation -- Economic aspects -- Latin America 1 Human capital -- Econometric models 1 Income tax -- Joint returns -- United States 1 Latin America -- Foreign economic relations 1 Mothers -- Employment -- Argentina 1 Political corruption -- Economic aspects 1 Political corruption -- Economic aspects -- Mathematical models 1