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Book

Prediction Machines

Everyone wants to know the future since no one won’t be caught off guard by the uncertain events. In Korea, internet users call the post or blog “Holy Place” when the prediction written a long time ago is realized.  Those predictions are buried among other general posts without catching attention from others when they are released. Because those […]

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Business

The Way Korean O2O Startups Do Their Business

O2O is becoming a common terminology to the public. Especially, young people use diverse on-demand apps to order food and call a taxi. Mega players in this industry are trying to raise funds for aggressive marketing and daily operation as competition is becoming more fierce with new players entering the market. Most O2O startups are […]

Categories
Business

What Matters in E-commerce

Next growth for e-commerce According to a recent news article, EU Commission is investigating antitrust issues in e-commerce. Everyone knows that by and large online shopping is replacing legacy shopping channels and some of the global players are dominant in this sector with their prowess. With this perspective in your mind, what is important is […]

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Data Science

Maximum-likelihood Estimation in R

If you are a marketer of a sports team and your mission is to boost the sales of annual membership for home games, what do you do first? You may want to know about which factors you should focus on to encourage customers to renew their annual membership. Actually, you need to wonder what is […]

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Data Science

Principal Component Analysis & Factor Analysis in R

Let’s say, there is a chunk of survey data, which consists of more than fifty questions. Even the number of total respondents reaches 60,000. Maybe it will take you a lot of time to analyze them according to your original intention or analysis objectives. Most people try to classify data or divide them into pieces […]

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Data Science

RFM: Simple & Efficient Way to Focus on Highly-responded Customers

When you try to focus on the target segments with a high response rate, RFM is one of the most useful methods. Most of all, RFM is intuitive and easy to get results in a way that it is a kind of heuristic analytics, which is different from a regression model. RFM is an acronym […]

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Data Science

How to Interpret Texts

If you have data regardless of whether they are obtained from social media or other sources, the next step is to analyze the meaning of those data. However, it is difficult to interpret the natural language in terms of sentiment analysis. Fortunately, there are several ways to understand text data and even provide quantification. TextBlob […]

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Data Science

How to Collect Tweets for Analysis

To analyze how a certain service or product is accepted in a market, many people have tried certain traditional methods such as market survey and FGI. However, it requires expenses and has some limitations of space and time needed to design the research from laying out questionnaire to obtaining survey respondents. There is a simpler […]

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Data Science

[Clustering Analysis in R] #4. Data Analysis

Finally, we can step into the process for clustering analysis, which is to separate customers for their characteristics and to find representative tendency of each group (segment). To that end, I will use two approaches: k-means and hierarchical clustering analysis. The former is to find if independent groups have high similarity from their representative observation […]

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Data Science

[Clustering Analysis in R] #3. Data Diagnostics

Now, we need to diagnose whether these data are adequate for analysis in a way that those results are not originated from biased sample distribution and correlated variables. To that end, muliticollinearity test clarifies correlation between independent variables and I used corrgram() for that matter, which is one of the packages in R. > install.packages(“corrgram”) […]