enquête (1) productivité (1) papier (1) innovation (1) revenu (1) croissance économique (1) entreprise (1) Businesspeople (1) Social mobility (1) Paper (1) Migration, Internal (1) Middle class (1) Income (1) Growth (1) Evidence (1) Entrepreneurship (1) Economic development (1) Business enterprises (1) Business (1) Average (1) Productivity (1) Growth (1)