1. Competition and innovation: an inverted-U relationship;Aghion;Q. J. Econ.,2005
2. Competition and growth with step-by-step innovation: an example;Aghion;Eur. Econ. Rev.,1997
3. Economic Welfare and the Allocation of Resources for Inventions;Arrow,1962
4. Environmental research joint ventures under emission taxes;Chiou;Environ. Resour. Econ.,2001
5. Is Emission Intensity or Output U-shaped in the Strictness of Environmental Policy?;Dijkstra,2014