Market concentration has been suggested as an enhancer of bargaining power imbalances for vertical commercial relationships. However, the empirical literature has not yet explored in which way this market concentration, as a result of -for instance- a M&A operations, could affect the...

It is well-known that group testing is an efficient strategy to screen for the presence of a virus. It consists in pooling n individual samples with a single test using RT-PCR. If at least one individual is infected, the test is positive, and it is negative otherwise. We show how group testing...

[Einführung] Der kommunale Finanzausgleich ist ein vertikaler Ausgleich mit horizontalem Effekt. Die originären Steuerquellen der Gemeinden reichen nicht aus, um ihre Ausgaben zu finanzieren. Der Finanzausgleich dient zunächst einmal dazu, die Finanzkraft der kommunalen Ebene insgesamt so...

This thesis consists of four chapters, all of which are related to credit risk and particularly modeling of default risk. The chapters can be read independently, and the intended audience differs somewhat among them. The first chapter is methodical; the intended audience consists of...

We examine the channels through which a randomized early childhood intervention in Colombia led to significant gains in cognitive and socio-emotional skills among a sample of disavantaged children aged 12 to 24 months at baseline. We estimate the determinants of parents' material and time...

The extent to which like-with like marry is particularly important for inequality as well as for the outcomes of children that result from the union. In this paper we discuss approaches to the measurement of changes in assortative mating. We derive two key conditions that a well-defined measure...

We show that a common (identical across investors) irrationality in information processing can be enough to create nontrivial trade, using one of standard partial-equilibrium environments. We can attribute this trade to their common irrationality because we strip the investors and their...

This Research Paper contains a detailed documentation of the dynamic computable general equilibrium model PuMA. The model is used for analysing economic, labour market and public finance effects of different policy options, structural changes and other important policy questions. PuMA is similar...