<P> Material infrastructure is defined as "those immobile, non-circulating capital goods that essentially contribute to the production of infrastructure goods and services needed to satisfy basic physical and social requirements of economic agents ." There are two distinct qualities of material infrastructures: 1) Fulfillment of social needs and 2) Mass production . The first characteristic deals with the basic needs of human life . The second characteristic is the non-availability of infrastructure goods and services . </P> <P> According to the business dictionary, economic infrastructure can be defined as "internal facilities of a country that make business activity possible, such as communication, transportation and distribution networks, financial institutions and markets, and energy supply systems ." Economic infrastructure support productive activities and events . This includes roads, highways, bridges, airports, water distribution networks, sewer systems, irrigation plants, etc . </P> <P> Social infrastructure can be broadly defined as the construction and maintenance of facilities that support social services . Social infrastructures are created to increase social comfort and act on economic activity . These being schools, parks and playgrounds, structures for public safety, waste disposal plants, hospitals, sports area, etc . </P> <P> Core assets provide essential services and have monopolistic characteristics . Investors seeking core infrastructure look for five different characteristics: Income, Low volatility of returns, Diversification, Inflation Protection, and Long - term liability matching . Core Infrastructure incorporates all the main types of infrastructure . For instance; roads, highways, railways, public transportation, water and gas supply, etc . </P>

A fundamental component of the is infrastructure is the