Access (economics) - The Access Function

The Access Function

Access can be written as a formula, in which the independent variables of time (T), space (S) and information (I) collectively establish the degree of Access (A):

f (T, S, I) = A Greater Access is generated by reducing the space between the entity seeking Access and the thing (physical or informational) being sought; by reducing the time needed for its transport or communication; and by increasing the amount of information available about it.

Access also conveys benefits through these variables: Greater Access increases available time by reducing the time needed for transport or communication; it increases the amount of usable space in which individuals or corporations can function (e.g., from local to global markets); and greater access to information aids in decision making by reducing the level of uncertainty.

Graphed over time, the amount of Access in the world has increased exponentially since the Industrial Revolution (the age of steamships and railroads) and the communications revolution of the 19th century (i.e. the telegraph, telephone, undersea cables, and radio). “Individuals once had access only to those things within walking distance,” the report states. “As a result, their choices and capabilities were severely constrained by lack of access. A major reason for the emergence and growth of villages and towns was the desire of inhabitants to gain access – access to others, to security, to specialized trades, and to other factors associated with human commerce and interaction.”

But, “as transportation systems, technologies, and communications capabilities evolved and networks expanded in breadth and sophistication, degrees of access continuously increased. These changes led to the creation of advanced civilizations and, eventually, to the integration of all societies into a global society.” In this respect, Access would seem to be a beneficiary of the network effect originally expressed as Metcalfe’s Law, which states that the value of a network increases exponentially with each new member.

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