Contributions published at Microeconomics, Industrial Organization, and Environmental Economics (Armin Schmutzler)

We consider a simple class of dynamic games. A continuum of players chooses between two actions (“locations”) in each period; per-period payoffs depend positively on the number of players choosing the same action. The resulting dynamics are investigated. If one location receives a favorable shock, the effects of the strength of externalities and the heterogeneity of the population on the extent of adjustment may be non-monotone and discontinuous, due to two competing effects. With stronger externalities (lower heterogeneity), less players move initially, but more players follow once the process has gained momentum.

We consider a regulator's choice between environmentally motivated emissions taxes and output taxes. We investigate how the optimal instrument depends on the monitoring cost function, the firm's technology, and on social preferences regarding output and environmental quality. Pure emissions taxes are usually not optimal with monitoring costs. Pure output taxes are optimal under sufficiently high monitoring costs, sufficiently limited options for emission reduction by means other than output reduction, and sufficiently high substitutability of the output. Finally, conditions for the optimality of mixed taxes are given.

This article studies several attributes of a firm's long-run decisions about organizational structure, attributes that affect the firm's short-run innovative activity. We focus on flexibility, which lowers the future costs of implementing innovations, and research capabilities, which improve the future opportunities for innovation. We consider two dimensions of innovation: demand-enhancing (product) and cost-reducing (process). These two types of innovation are complementary in terms of increasing the firm's net revenue in the short run. The complementarities between the firm's short-run decision variables then lead to complementarities between its long-run decisions about product and process flexibility and research capabilities.