Why do people appear to forgo information by sorting into 'echo chambers'? We construct a highly tractable multi-sender, multi-receiver cheap talk game in which players choose with whom to communicate. We show that segregation into small, homogeneous groups can improve everybody's information...

The paper analyses the European Union sub-national governments? tax revenue structures and their dynamic during the last decades. Tax composition obtained a considerable interest during the recent years, particularly after the recent global financial and economic crisis. In many European Union...

A common assumption in the optimal taxation literature is that the social planner maximizes a welfarist social welfare function with weights decreasing with income. However, high transfer withdrawal rates in many countries imply very low weights for the working poor in practice. We reconcile...

This paper studies second best policies for education, saving, and labour in an OLG model in which endogenous growth results from human capital accumulation. Government expenditures have to be financed by linear instruments so that growth equilibria are inefficient. The inefficiency is...

This paper studies the implications of (endogenously) directed technical change for the design of non-linear labor income taxes in a Mirrleesian economy augmented to include endogenous technology development and adoption choices by firms. First, I identify conditions under which any progressive...

This paper examines efficiency in the provision and utilization of a congestible public input in a symmetric tax competition framework with wage rigidities. Despite the fact that also lump-sum taxation is available for regional governments, second-best efficiency emerges only as a special case...

We build a model of collective reputation under moral hazard to analyze incentives under collective reputation. Producers can produce high quality, but it is only imperfectly detected. Products not detected as of high quality are pooled by to the collective reputation structure. Collective...

What is the optimal size of expert committees? To address this question, I present a model of a committee of experts with career concerns. Each expert may observe an argument about the state of the world and is unsure about the argument s soundness. Experts may remain silent or compete for the...

We analyze different committee designs in a model with the endogenous participation of experts who have private information about their own abilities. Each committee design involves a test of abilities whose accuracy influences experts’ decisions to participate. We derive the following...

Which decision rule should we use to make a binary collective choice? While voting procedures are applied ubiquitously, they are criticized for being inefficient. Using monetary transfers, efficient choices can be made at the cost of a budget imbalance. Is it optimal to do so? And why are...