Tropical Data: Approach and Methodology as Applied to Trachoma Prevalence Surveys.

Purpose: Population-based prevalence surveys are essential for decision-making on interventions to achieve trachoma elimination as a public health problem. This paper outlines the methodologies of Tropical Data, which supports work to undertake those surveys.

Methods: Tropical Data is a consortium of partners that supports health ministries worldwide to conduct globally standardised prevalence surveys that conform to World Health Organization recommendations.

The impact of the shadow economy on economic growth and CO emissions: evidence from ECOWAS countries.

The Economic Community of West African States (ECOWAS) is one of the most dynamic African sub-regional organizations in several areas, such as economic integration and environmental conservation. On the other hand, it is also one of the sub-regions with the largest size of the shadow economy in the world. This article empirically explores the impact of the shadow economy on economic growth and CO emissions in ECOWAS countries.