一、中国居民人均消费模型 例2.5.1 考察中国居民收入与消费支出的关系
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一、Ŷ0是条件均值E(Y|X=X0)或个值Y0的一个无偏估计 二、总体条件均值与个值预测值的置信区间
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一、一元线性回归模型的基本假设 二、参数的普通最小二乘估计(OLS) 三、参数估计的最大或然法(ML) 四、最小二乘估计量的性质 五、参数估计量的概率分布及随机干扰项方差的估计
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Electronic Commerce Prentice Hall © 2006 2 Learning Objectives 1. Discuss the major steps in developing an EC application. 2. Describe the major EC applications and list their major functionalities
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Electronic Commerce Prentice Hall © 2006 2 Learning Objectives 1. Describe the differences between legal and ethical issues in EC. 2. Understand the difficulties of protecting privacy in EC. 3. Discuss issues of intellectual property rights in EC
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Electronic Commerce Prentice Hall © 2006 2 Starting a New Online Business • Creating a New Company or Adding an Online Project – Step 1: Identify a consumer or business need in the marketplace – Step 2: Investigate the opportunity – Step 3: Determine the business owner’s ability to meet the need
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Electronic Commerce Prentice Hall © 2006 2 Learning Objectives 1. Describe the need for justifying EC investments, how it is done, and how metrics are used to determine justification. 2. Understand the difficulties in measuring and justifying EC investments. 3. Recognize the difficulties in establishing intangible metrics and describe how to overcome them
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Electronic Commerce Prentice Hall © 2006 2 Learning Objectives 1. Describe the strategic planning process. 2. Describe the purpose and content of a business plan. 3. Understand how e-commerce impacts the strategic planning process. 4. Understand how EC applications are formulated, justified, and prioritized
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Electronic Commerce Prentice Hall © 2006 2 Learning Objectives 1. Describe the role of support services in EC. 2. Define EC order fulfillment and describe the EC order fulfillment process. 3. Describe the major problems of EC order fulfillment. 4. Describe various solutions to EC order fulfillment problems
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