Commerce 1 Competition 1 Competitive strategy 1 Corporate environmental performance Corporate social responsibilities (CSR) 1 Differentiation (calculus) 1 Differentiation strategies 1 Environmental management 1 Environmental performance 1 Investments 1 Managers 1 Manufacturing firms 1 Market competition 1 Strategic investments 1 corporate social responsibility (CSR) 1 cost leadership 1 differentiation 1 environmental performance 1 market competition 1