Firm innovation Cross section data 1 D22 1 Economic growth 1 Economic growths 1 Economics 1 Endogenous growth 1 Heterogeneity 1 Heterogeneous firms 1 Innovation 1 Innovative firms 1 Inter-sectoral knowledge spillovers 1 L25 1 L26 1 L53 1 Multiple sectors 1 O12 1 O25 1 O31 1 Productivity 1 R&D 1 Resource allocation 1 Services sectors 1 Simultaneity 1 Surveys 1 industrial development 1 industrial investment 1 industrial technology 1 innovation 1 knowledge economy 1