This report, based on a household survey conducted in 2006, discusses options for discouraging qat consumption in Yemen. It draws on a survey-the first representative data collection exercise aimed specifically at assessing the qat consumption phenomena-which confirms that the use of this drug...

COVID-19 created a dynamic shock to the international tourism industry, with the related health concerns and travel restrictions impacting travelers' perceptions of risk. Among the most affected economies were Small Island Developing States (SIDS), which are highly dependent on tourism receipts,...

"Past research into the determinants of international trade highlighted the importance of the basic spatial gravity model augmented by additional variables representing sources of friction. Studies modeled many sources of friction using various proxies, including indices based on expert judgment...

Plastics have been a development driver for decades but have turned into a development problem due to their omnipresence in the environment. Marine litter and plastic pollution have attracted much attention and commitments from governments and the private sector alike in the past few years....

Cocoa is by far Ghana's most important crop. It dominates the agricultural sector and is a major source of income for approximately 800,000 farmers and many others engaged in trade, transportation, and processing of cocoa. Cocoa holds a unique position in Ghana's economy. It has long played a...

Biomass is the most important source of energy in Rwanda, especially for domestic cooking. Today approximately 86 percent of primary energy comes from biomass, mainly in the form of wood that is either used directly as a fuel (57 percent), or converted into charcoal (23 percent) together with...