[Optimal trade and industrial policies are derived for a home market that is supplied by a domestic firm and a foreign firm. The optimal policy combination can be quite sensitive to the nature of the duopoly's competition. For example, for some cost and demand structures, the optimal policy under Cournot competition consists of a domestic production tax and a tariff, but that under Bertrand competition consists of a production subsidy and free trade.]

Market reactions to non-fundamental news (or no-news) reverse for extreme firm information environments. A one percentage increase in intangible returns for small firms (large firms) lead to a 2.33% decrease (0.70% increase) in monthly returns over the next 12months. The results are robust to firm characteristics adjustments, alternative measures of firm information environment and private information, idiosyncratic risk, and microstructure effects. The results are consistent with the cross-sectional findings of confirmation bias, where investors show stronger bias when the information environment is rich. We derive a model with confirmation bias that further explains the cross-sectional momentum pattern for the majority of firms in the market.