Margin visa a visa average variables in managerial economics analyses. I. Marginal value of a variable – the change in the variable associated with a unit increase in a driver, e. G. , amount earned by working one more hour; it. Average value of a variable – the total value of the variable divided by the total annuity of a driver, e. G. , total pay divided by total no. Of hours worked; iii. Driver – the independent variable, e. G. , no. Of hours worked; ‘v. The marginal value of a variable may be less that, equal to, or greater than the average value, depending on whether the marginal value is decreasing, constant or increasing with respect to the driver; v. If the marginal value of a variable is greater than its average value, the average value increases, and vice versa. (b) Stocks and flows. I. Tock – the quantity at a specific point in time, measured in units of the item, e. G. , teems on a balance sheet (assets and liabilities), the world’s oil reserves in the beginning of a year; it. Flow – the change in stock over some period of time, measured in units per
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Having analyses the effects of each factor, they can be put together for the complete picture. . Organizational boundaries. (a) Organizations include businesses, non-profits and households. (b) Vertical boundaries – delineate activities closer to or further from the end user. (c) Horizontal boundaries – relate to economies of scale (rate of production or delivery of a good or service) and scope (range of different items produced or delivered). 3 vertical and horizontal boundaries. 7. Competitive markets. (a) Markets. I. Market consists of buyers and sellers that communicate with one another for voluntary exchange. It is not limited by physical structure. It. In markets for consumer reduces, the buyers are households and sellers are businesses. Iii. In markets for industrial products, both buyers and sellers are businesses. ‘v. In markets for human resources, buyers are businesses and sellers are households. V. Note: an industry is made up of businesses engaged in the production or delivery of the same or similar items. (b) Competitive markets. . Markets with many buyers and many sellers, where buyers provide the demand and sellers provide the supply, e. G. , the silver market. It. The demand-supply model – basic starting point of managerial economics, the model describes the systematic effect of changes in prices and other economic variables on buyers and sellers, and the interaction of these choices. (c) Non-competitive markets – a market in which market power exists. 8. Market power. (a) Market power – the ability of a buyer or seller to influence market conditions.
A seller with market power will have the freedom to choose suppliers, set prices and influence demand. (b) Businesses with market power, whether buyers or sellers, still need to understand and manage their costs. (c) In addition to managing costs, sellers with market power need to manage their emend through price, advertising, and policy toward competitors. 9. Imperfect Market. (a) Imperfect market – where one party directly conveys a benefit or cost to others, or where one party has better information than others. (b) The challenge is to resolve the imperfection and be cost-effective. C) Imperfections can also arise within an organization, and hence, another issue in managerial economics is how to structure incentives and organizations. 10. Local visa a visa global markets. (a) Local markets – owing to relatively high costs of communication and trade, some markets are local, e. G. Housing, groceries. The price in one local market is independent of prices in other local markets. 4 (b) Global markets – owing to relatively low costs of communication and trade, some markets are global, e. G. , mining, shipping, financial services.
The price of an item with a global market in one place will move together with the pries elsewhere. (c) Whether a market is local or global, the same managerial economic principles (d) Note: Falling costs of communication and trade are causing more markets to be more integrated across geographical border – enabling the opportunity to sell in new arrests as well as global sourcing. Foreign sources may provide cheaper skilled labor, specialized resources, or superior quality, resulting in lower production costs and/or improved quality.
The managerial economics of the “new economy’ is much the same as that of the “old economy’ with two aspects being more important – network effects in demand and scale and scope economies. 1 B. Vertical boundaries delineate activities closer to or further from the end user. Horizontal boundaries define the scale and scope of operations. Marketing over the Internet is a scalable activity. Delivery through UPS is somewhat scalable: UPS already incurs the fixed cost of an international collection and distribution network; it may be willing to give Amazon bulk discounts for larger volumes of business. . Number of cars in service January 2002 + production + imports – exports – scrapped during 2002 = Number of cars in service January 2003. Number of cars in service is stock; other variables are flows. 3. [omitted]. 4. No, models must be less than completely realistic to be useful. 5. (a) Average price per minute = (210 + 120 x 4)/5 = 138 yen per minute. B) Price of marginal minute = enemy. 6. (a) Flow; (b) Stock; (c) Stock. 5 7. (a) The electricity market includes buyers and sellers. (b) industry consists of sellers only.
The electricity 8. (a) False. (b) False. 9. [omitted]. 10. If there are scale economies, the organization could product at a lower cost on a larger scale, which means wider horizontal boundaries; and vice versa. 1 1 . Yes. Horizontal boundaries: how many product categories should it sell? Vertical boundaries: should it operate its own warehouses and delivery service? 12. Intel has relatively more market power. 14. Both (a) and (b). 15. Competitive markets have large numbers of buyers and sellers, none of which can influence market conditions.
By contrast, a buyer or seller with market power can influence market conditions. A market is imperfect if one party directly conveys benefits or costs to others, or if one party has better information than another. Jupiter Car Rental offers two schemes for rental of a compact car. It charges $60 per day for an unlimited mileage plan, and $40 per day for a time-and-mileage plan with 100 free miles plus 20 cents a mile for mileage in excess of the free allowance. . For a customer who plans to drive 50 miles, which is the cheaper plan.
What are the average and marginal costs per mile of rental? (The marginal cost is the cost of an additional mile of usage. ) b. For a customer who plans to drive 150 miles, which is the cheaper plan. What are the average and marginal costs per mile of rental? C. If Jupiter raises the basic charge for the time-and-mileage plan to $44 per day, how would that affect the average and marginal costs for a customer who drives 50 miles? 6 Answer (a) It is helpful to sketch the total rental cost as a function of the mileage (see figure low).
The breakable between the two plans is at 200 miles per day. For 50 miles, the time-and-mileage plan is cheaper. Average cost = $40/50 = 80 cents per mile. Marginal cost = O. Total cost ($) time-and-mileage plan unlimited mileage plan $60 $40 200 Quantity (miles per day) (b) For the 1 50 mile customer, the time-and-mileage plan is still cheaper. Average (c) After the increase in the basic charge, the average cost = $(44 + 0. 2 x 50)/1 50 = 36 cents per mile, while marginal cost = 20 cents per mile. The increase in the basic charge doesn’t affect the marginal cost. 7