Apart from altruistic reasons, NGOs may engage in developing countries under conditions of conflict and war in order to secure funding and survive in the ‘market’ of humanitarian relief and development assistance. Applying a difference-in-difference-in-differences approach, we analyze...

In Germany persons who receive public assistance (Sozialhilfe) may keep only a small part of income from employment above a certain amount. This means that for some persons living on welfare the economic incentives to look for employment are rather weak. This working paper discusses different...

The stock of public debt in some developed countries continues to increase because of a lack of tax revenues and the burdens of social security. Many of those developed countries suffer from lower birth rates. Child allowances might help to raise fertility, leading to higher tax revenue in the...

There are only few estimates of the returns on contributions to the German public pension System (GPPS). Those that are published ränge between nominal rates of future returns between about 4,5 % and 48 %, indicating that GPPS treats different groups of people differently. The authors develop a...

This article explores the influence of competitive conditions on the evolutionary fitness of risk preferences, using the professional competition between fund managers as a practical example. To explore how different settings of competition parameters, the exclusion rate and the exclusion...

Human trafficking is a humanitarian problem of global scale, but quantitative research on the issue barely exists. This paper is a first attempt to explore the economic drivers of human trafficking and migrant exploitation using micro data. We argue that migration pressure combined with informal...

Diversification into non-agricultural activities in rural areas can be broadly classified as either survival-led or opportunity-led. The existence of these two types of non-agricultural activities implies a U-shaped relationship between the share of income derived from non-agricultural...

Corruption has fierce impacts on economic and societal development and is subject to a vast range of institutional, jurisdictional, societal and economic conditions. Research indicates that corruption's predominantly negative effects have arisen to a massive trans-border threat while creating...

Differential tax analysis is used to show how the socially optimal fiscal-tax to liquidity-tax ratio changes with the relative size of the tax-evading hidden economy. The smaller the relative size of the hidden economy, the larger the optimal fiscal-tax to liquidity-tax ratio. The empirical...