tailieunhanh - Báo cáo khoa học: "Opinion Mining Using Econometrics: A Case Study on Reputation Systems"

Deriving the polarity and strength of opinions is an important research topic, attracting significant attention over the last few years. In this work, to measure the strength and polarity of an opinion, we consider the economic context in which the opinion is evaluated, instead of using human annotators or linguistic resources. We rely on the fact that text in on-line systems influences the behavior of humans and this effect can be observed using some easy-to-measure economic variables, such as revenues or product prices. . | Opinion Mining Using Econometrics A Case Study on Reputation Systems Anindya Ghose Panagiotis G. Ipeirotis Arun Sundararajan Department of Information Operations and Management Sciences Leonard N. Stern School of Business New York University aghose panos arun @ Abstract Deriving the polarity and strength of opinions is an important research topic attracting significant attention over the last few years. In this work to measure the strength and polarity of an opinion we consider the economic context in which the opinion is evaluated instead of using human annotators or linguistic resources. We rely on the fact that text in on-line systems influences the behavior of humans and this effect can be observed using some easy-to-measure economic variables such as revenues or product prices. By reversing the logic we infer the semantic orientation and strength of an opinion by tracing the changes in the associated economic variable. In effect we use econometrics to identify the economic value of text and assign a dollar value to each opinion phrase measuring sentiment effectively and without the need for manual labeling. We argue that by interpreting opinions using econometrics we have the first objective quantifiable and contextsensitive evaluation of opinions. We make the discussion concrete by presenting results on the reputation system of . We show that user feedback affects the pricing power of merchants and by measuring their pricing power we can infer the polarity and strength of the underlying feedback postings. 1 Introduction A significant number of websites today allow users to post articles where they express opinions about products firms people and so on. For example usef 6 on post reviews about products they bought and users on post feedback describing their experiences with sellers. The goal of opinion mining systems is to identify such pieces of the text that express opinions Breck et al. 2007 Konig and Brill 2006 .

• Báo cáo khoa học
• Opinion Mining
• Econometrics
• A Case Study on Reputation Systems
• báo cáo khoa học
• mô hình ngôn ngữ
• xử lý ngôn ngữ tự nhiên
• Generalizing Dependency Features
• Mahesh Joshi
• báo cáo ngôn ngữ
• PageRanking WordNet Synsets
• An Application to Opinion Mining
• Andrea Esuli
• a Summarization System Integration
• Opinion Mining Techniques
• Summarize Blogs
• scientific reports
• model language
• process natural language
• Determining Term Subjectivity
• Term Orientation
• Aspect based sentiment analysis
• Sentiment analysis
• Shared task
• VLSP workshop
• Machine learning
• Vietnamese sentiment analysis
• Natural Language Processing
• Comparative sentences
• Support vector machines
• Conditional random fields
• Convolution neural network
• Deep learning
• Long short term memory
• Sentimental approaches
• Bài giảng Xử lý ngôn ngữ tự nhiên
• Ngôn ngữ tự nhiên
• Kỹ thuật lập trình
• Xử lý nhập nhằng ngữ nghĩa
• Xử lý ngữ nghĩa
• Xử lý ngôn ngữ
• Ngôn ngữ lập trình
• Nhập nhằng cấu trúc
• Tri thức về ngôn ngữ
• Mô hình n gram
• Dịch máy
• Phương pháp dịch máy
• Hiểu ngôn ngữ
• Phân tích ngữ nghĩa
• Phân loại tin tự động
• Biểu diễn vị từ
• Thuộc tính về sự kiện
• Thuộc tính về sự kiện
• Mô hình ngôn ngữ Google Book N grams
• Mô hình ngôn ngữ KenLM
• Phương pháp làm mịn
• Tách từ tiếng Việt
• Gán nhãn từ loại
• Phân tích cú pháp
• Nghĩa từ vựng
• Phân giải nhập nhằng từ
• Phân loại văn bản
• Lexical chain
• Phản hồi thông tin
• Bài toán PTCP
• Cấu trúc ngữ pháp
• Phân tích cú pháp xác suất
• CKY kết hợp xác suất
• Văn phạm phi ngữ cảnh xác suất
• Hình thái học