For example, expect the cost of a new roof with tile to be more than wood shingles. However, heavier and longer-lasting shingles of a low cost material can cost as much or more than the low-end of a more expensive roofing material, such as tile.he cost of a new roof with asphalt is among the lowest of any popular material and they carry a moderate lifespan. Advantages: 1  Average 20+ year lifespan. 2  Low cost.
Characteristics of Security Indexes. 1. A price weighted series is the average of the stocks' prices in the series. It is calculated by adding together each stock price and dividing the total by the number of stocks in the series.
Market structures. Market structure is defined by economists as the characteristics of the market. It can be organizational characteristics or competitive characteristics or any other features that can best describe a goods and services market.The major characteristics that economist have focused on in describing the market structures are the nature of competition and the mode of pricing in that market.he level of competition in firms will be influenced by the market structure. A competitive market structure and a monopoly will have different levels of competition. Features of market structure. 1  The number of firm operating in a market; It will cover both the local and foreign markets.