In this paper, we compare Principal Component Analysis (PCA) and Partial Least Squares (PLS) methods to generate weights for composite indices. In this context we also consider various treatments of non-metric variables when constructing such composite indices. Using simulation studies we find...

This article investigates the effect of natural resources on whether ethno-political groups choose to pursue their goals with non-violent as compared to violent means, distinguishing terrorism from insurgencies. It is hypothesized that whether or not the extraction of fossil fuels sparks...

When analyzing the impact of international organizations on the environment, two main issues arise. First, we have to quantify the participation of the organizations on countries they deal with. Second, the environmental impact of this involvement has to be measured. This paper attempts to do...

This paper analyzes the influence of the shadow economy on corruption and vice versa. We hypothesize that corruption and shadow economy are substitutes in high income countries while they are complements in low income countries. The hypotheses are tested for a crosssection of 120 countries and a...

For a number of OECD countries, the deterioration of labour market outcomes for less-skilled workers since the early 1980's has coincided with a steady decline in union membership. Globalisation is commonly believed to have contributed to both developments. However, recent studies fail to find...

The paper develops a theoretical model showing a mutual relationship between corruption and capital account restrictions. According to the model, higher corruption induces stricter restrictions and vice versa. We test the model using panel data for 112 countries over the period 1984-2002 and...