This conceptual paper analyses the concept of development that is a process of progressive growth that generates a transition from simple to complex system. In economics, development is a multidimensional process that generates changes in economic, political, social and institutional structures...

We examine theoretically demand in a two-good economy where the demand of one good is influenced by either a spillover effect in the form of an externality from other consumers' choices and or a conformity effect representing a need for making similar choices as others. A positive spillover...