Political science data often contain grouped observations, which produces unobserved "cluster effects" in statistical models. Typical solutions include (1) ignoring the impact on coefficients and only adjusting the standard errors of generalized linear models (GLM) or (2) addressing clustering...

Abstract This article presents original mixed method research to describe the use of rare illicit psychoactive substances, with special emphasis on crack cocaine in France. We first introduce a unique monitoring system committed to the observation of hard-to-reach populations. Qualitative...

The Healing Warriors Program is a non-profit organization aiming to improve the quality of life for veterans suffering from Post-Traumatic Stress Disorder and Traumatic Brain Injury through alternative healing modalities. This article describes how various hypotheses were tested using data...

This study explores the effects of air pollution on self-reported health status and the health related costs in UK. The estimates are based on data from the British Household Panel Survey (BHPS). The effects of air pollution on individuals' health status are estimated and their monetary value is...

This article describes how foreign direct investment in Mongolia has reached 3.9 billion US$ mainly in the mining sector that amounted approximately 40% of the year's GDP. Even though FDI into Mongolia has been grown along with the country's economic development with trade openness to the world,...

The authors investigated several import retail e-commerce sellers through questionnaires and selected several types of variables based on Porter's competitive strategy theory. Then the authors used the panel data to empirically verify theoretical consumptions based on samples got by Python...

The objective of this paper is primarily methodological. Using a new specification, we reanalyze the data on worldwide environmental quality investigated by Gene Grossman and Alan Krueger in their well-known paper on the environmental Kuznets curve (which postulates an inverse U-shaped...

This paper shows how to take into account risk aversion when measuring poverty under income variability. An application to British panel data suggests that income and poverty comparisons between the self-employed and other groups of households are sensitive to assumptions on the degree of risk...

In December 1993, restrictions to foreign ownership across major Mexican economic sectors were abolished. This paper studies output, industrialization intensity, ``international infrastructure", and government expenditures on infrastructure as determinants of FDI inflows into Mexican states over...

In recent years, there has been a lack of empirical work devoted to the explanation of migration patterns into the European Union with the exception of country specific studies. At the same time, migration theories have undergone a considerable renewal, which has led to the development of new...