The ‘local’ represents a small-sized space, while ‘global’ concerns a territory of vast dimensions encompassing the entire space considered. The distinction between the local and the global levels is based on the notion of distance to cover, as represented in terms of cost or time. Depending on the sophistication of technology, this notion may vary a great deal, and the line between local and global is not always an easy one to draw. From a practical viewpoint, local and global scales may also be defined by access to data and technical limitations. The way individuals perceive the global scale is closely associated with their social status and income. The local level, which one may define as the base unit, could very well integrate, or be made to enter, into the global level represented by the world as a system.