Spectrem Articles Subscription A Spectrem article subscription is required to access articles in this dashboard. Article Date: 03/01/2017 Investing from the Ground Up The appeal of real estate investing comes in large part from the classic economic standard principle of supply and demand.As long as the planet Earth remains our only source of land, the supply of real estate remains constant. As long as the population of the planet increases, the demand for real ... Log in to view full article. Sign In Forgot your password? For more information about Spectrem Articles Subscription Plan, or to purchase CLICK HERE