We set up a model to analyze the effects of mergers between sellers of complementary components where firms invest in compatibility and can engage in bundling. We consider the impact of merger on prices, investment and consumer surplus. We also analyse when the merged firm may have an incentive...

In the European Union (EU), there are longstanding and ongoing pressures toward a tax that is levied on the EU level to substitute for national contributions. We discuss conditions under which such a transition can make sense, starting from what we call a ‘decentralization theorem of...

We model merger control procedures as a process of sequential acquisition of information and compare US and EU procedures. In the US, the authorities do not have to justify their decision to require further information (issue a second request), whereas in the EU, the authorities face a different...

In the EU there are longstanding and ongoing pressures towards a tax that is levied on the EU level to substitute for national contributions. We discuss conditions under which such a transition can make sense, starting from what we call a "decentralization theorem of taxation" that is analogous...

We model merger control procedures as a process of sequential acquisition of information in which mergers can be cleared after a first phase of investigation. We find that the enforceability of clearance decisions at the end of the first phase is unattractive to the extent that it prevents the...

We introduce tax competition for mobile labor into an optimal-taxation model with two skill levels. We analyze a symmetric subgame-perfect Nash equilibrium of the game between two governments and two taxpayer populations. Tax competition reduces the distortion from the informational asymmetry...

We sketch a model according to which tax havens attract corporate income generated in corrupted countries. In our framework, tax havens have two opposite effects on welfare. First, tax havens' services have a positive effect on welfare through encouraging investment by firms fearing...