This book is written in commemoration of Karel Jansen. It was originally planned as a Liber Amicorum for his retirement in 2011 to honour a valued and productive colleague, teacher and researcher. After Karel's sudden death the contributors decided to do just that and go on with the production...

This paper calculates and analyzes key indicators from Bolivia's Green National Accounts during the period 1990 - 2015, which covers an entire Commodity Super Cycle. The first half includes the Great Commodities Depression while the second half of the period is characterized by an unprecedented...

Despite favourable ecological and economic results, many developing countries have not yet adopted an integrated pesticide management (IPM). Given rising marginal costs and diminishing marginal benefits from IPM technology transfer, an optimal control framework is used to identify optimal rates...