We develop a framework to conduct experiments for estimating direct and spillover effects when units are grouped into mutually exclusive clusters. Crucially, our framework accounts for heterogeneous treatment effects across clusters and heterogeneous cluster sizes, which are pervasive in...

We develop a framework to analyze partial population experiments, a generalization of the cluster experimental design where clusters are assigned to different treatment intensities. Our framework allows for heterogeneity in cluster sizes and outcome distributions. We study the large-sample...

The article assesses the impact of a Common Corporate Tax Base (CCTB) as promoted by the European Commission and the related Working Groups on the effective tax burdens of companies in all 27 EU member states. The results shall help to evaluate the economic consequences of introducing a...

We study optimal nonlinear taxation of labor income and linear taxation of capital income in a life-cycle framework with private information and idiosyncratic risk. We focus on simple history-independent tax instruments. We first analyze the welfare losses from this simplification as compared to...

Value added taxes (VAT) are an important, and in many cases increasing, source of revenue in both developed and developing countries. Unsurprisingly there is an intense academic and policy debate about the appropriate VAT rate structure, for both equity and efficiency reasons. In this paper we...

The book offers a comprehensive treatment of tax theory and policy. It surveys the German tax system, portrays tax history, and describes principles of tax administration and the construction of schedules. Tax shifting, optimal taxation theory, and questions of tax justice are considered in...

Several recent articles claim that pre-tax income equality promotes growth. Equality is argued to dampen demand for redistributive economic policies that tax returns to growth-enhancing activities such as investment. These results rest heavily on the assumption that pre-tax income equality is an...

While a basic theoretical principle in public economics assumes that individuals' behaviour is fully-optimizer with respect to the introduction of a tax, an increasing body of research is presenting evidence that agents decision making is often affected by non-negligible cognitive biases, which...

We study the incidence and the optimal design of nonlinear income taxes in a Mirrleesian economy with a continuum of endogenous wages. We characterize analytically the incidence of any tax reform by showing that one can mathematically formalize this problem as an integral equation. For a CES...