Which of the following statements is incorrect? 2. The idea of how to make an effective vaccine is non-rivalry in consumption. Therefore, investment in coming up with the idea has increasing return to scale because larger economies have a lower average cost for the investment. O b. public goods are always provided by the government. 6. In addition to policy mistakes, there were institutional factors that contributed to the failure of the U.S. to control or mitigate the damages from the Covid-19 pandemic. These institutional factors may include hyper-individualism and Intense partisanship that politicalized mark-wearing. O d. One barrier to international trades is that contracts are more difficult to enforce for international trades than domestic trades. Q e Market equilibrium under perfect competition leads to the under-provision of public goods. Of. Complementarity in investments in different but related areas means that there may be multiple equilibria in economic development