Although the lot size problem (i.e., the economic order quantity model) has been widely accepted and used by researchers and practitioners, it has also been criticized by others on the grounds that not accounting for some of the hidden costs in inventory systems often lead to poor results. This paper postulates that estimating these hidden costs may be attained by applying the first and second ...

Innovative finance is now considered essential to mobilize the trillions projected as required meet sustainable development goals. The International Finance Facility for Immunisation (IFFIm), which issues vaccine bonds, an emblematic example of innovative in global health and development. Since its launch 2006, IFFIm has played a leading role developing social bonds funding health, securing ove...