종속변수 모델을 배우면서 나온 대표적 모델은 data가 censored 되었을 경우와 truncated되었을 경우이다. 그리고 지금까지 다양한 모수와 준모수방법을 적용한 limited dependent variable 모형이 개발되었는데 그 중에서 준모수법을 사용한 가장 기본적인 censored sample selection model은 Tobin이 만든 모형을 기초로 한 방
Introduction
A. Chosun Daily’s background
1) History
Chosun Daily gets its name from Korea's last dynasty in Korean history. The Chosun Ilbo Establishment Union was created in September 1919, and the Chosun Daily company was founded on March 5, 1920. The newspaper was critical of, and sometimes directly opposed, the actions of the pro-Japanese government during Japanese colonial ru
III. Strategy
1. Understanding changes in the world and proper reaction.
Facebook recognizes change of consumer’s needs and reflects various needs immediately. Facebook has concentrated on providing credible information as well as a large number of information. Users prefer credible information source when the quantity of information increases.
Furthermore, Facebook provides easy and comf
관측하여 얻어진 자료를 완전자료(complete data)라 한다.
중도절단 자료
수명시험에서는 모든 제품의 고장이 관측되기 이전에 시험을 중단하는 경우가 많으며, 이 때에는 시험제품의 일부에 대해서만 수명에 대한 완전한 정보를 얻을 수 있다. 이와 같은 자료를 관측중단자료(censored data)라 한다.
censored data가 발생하는 경우에는 분석의 기간을 짧게 쪼개서 5년 survival rate, 10년 survival rate등으로 구해서 그 기간에 censored 되는 경우를 제외할 수 있도록 하는 방법을 사용해야 한다. 그러나.... 이 방법을 사용하게 되면 될 수록 실제 survival과 점점 더 먼 결과를 얻게 될 것이다. 또한 생명표법을 이용
◆ Modern Society and Web 2.0
Web 1.0 era as the word of "sea of information", we are exposed to a lot of information. Regardless of distance and time, we can easily send information as well as our own private information. Also, the amount of data, in 1989, the European Particle Physics in Switzerland, developed hypertext and MOSAIC invented first web browser in 1993. Those changes helped to
When Google censor the materials, it is still in the Google index itself. But the post-processing has removed it from any results shown to the user
- Users know that some information were blocked
To provide more information, Google tried to shift service to Hong-Kong by redirecting search traffic in China to unfiltered Hong-Kong page.
Right Theories
“they should not pursue actio
data about its segmentation, targeting, and pricing were explained. Now let us draw the attention to more specific aspects of WizWid and especially to the positive and negative sides it faces because of its business characteristics.
As mentioned earlier, WizWid is an importing agency as well as an online shopping mall where the imported (as well as domestic) products are sold to customers. In th
2. Background of the concept of MIS
Comparing to other product, dairy products such as milk requires the highest quality of taste and freshness through all the process from the ranch to the market. Lots of people today receive milk. Each time when they drink milk they expect freshness. Therefore the company should predict the exact demand, construct sophisticated customer database, logistics &