Articles by Florian Teschner

A look at AirBnB demographics

July 2, 2016 | Florian Teschner

Once in a while I use AirBnB. There are a couple of features that I (intuitively) use to judge if an apartment is save to book; ratings, images of the flat and the user avatar. Apparently, these avatars play an important part in the overall service and usage of AirBnB. ... [Read more...]

Is Online AD Space a Commodity?

June 11, 2016 | Florian Teschner

I just started reading Alvin Roth’s book “Who gets What - And why?” and it already got me thinking. The book discusses the principles of markets and market design using various examples. One starting point is the transition of markets into being commodity markets. Simplified; in a commodity market ... [Read more...]

Arbitrage in Euro’16 soccer odds?

May 28, 2016 | Florian Teschner

With the Euro’16 coming up in 2 weeks, I thought it would be great to look up the odds for each team. Using a small R-Script, I got the data from this site. As previously discussed, I cleaned the data (calculate the probability from the odds and then normalize the probability ... [Read more...]

From Image Recognition to Brand Logo Detection

March 27, 2016 | Florian Teschner

I previously did a short review on Microsoft’s image recognition and face detection API. A couple of weeks ago Google announced their vision API providing some similar features. Even though there is no R package or code to dive into this API and their API documentation is rather sparse, ... [Read more...]

Web-Scraping JavaScript rendered Sites

March 26, 2016 | Florian Teschner

Gathering data from the web is one of the key tasks in order to generate easy data-driven insights into various topics. Thanks to the fantastic Rvest R package web scraping is pretty straight forward. It basically works like this; go to a website, find the right items using the selector ... [Read more...]

Revisiting Data-driven Marketing, part III

March 6, 2016 | Florian Teschner

In the last two posts 1, 2, I tried to discuss how measurement and false metrics drive optimization towards low hanging fruits and in the end degrade ad effectiveness. I would like to follow up with a short example of how the issue extends into the paid search (e.g. Google Adwords) ... [Read more...]

Revisiting Data-driven Marketing, part II

March 1, 2016 | Florian Teschner

In the last post, I discussed how the current digital measurement approach is biased towards targeted ad buying. The key reason is that ad effectiveness is calculated on a cost per order/conversion basis. As particular user segments -which are addressed with digital targeting- have a high base purchase probability, ... [Read more...]

Revisiting Data-driven Marketing

February 27, 2016 | Florian Teschner

One of the key trends in the advertising industry is (digital) data-driven marketing. The whole thing starts with massive, passive data collection. No matter which website we visit or which app we use: We leave a digital footprint. These footprints are compiled for individual users and form so-called user profiles. ... [Read more...]

On Panel Sizes

January 22, 2016 | Florian Teschner

In the face of upcoming elections in the US and in Germany, polling is big news. One thing that strikes me as enormously missing in the debate is how inaccurate a single poll is. Moreover, one never reads about the uncertainty around a single poll. What is the range of ... [Read more...]

Artificial Intelligence in the News?

January 16, 2016 | Florian Teschner

In a previous post, I expressed the feeling that artificial intelligence, data science and big data are currently “hot” in the news. One of my favorite news outlet (“Die Zeit”) has an open data policy in a sense that they have a public API. I thought it would be worth ... [Read more...]

Who is going down? Bundesliga Betting Odds

January 8, 2016 | Florian Teschner

An essential part of the typical office talk in Germany is about soccer and the Bundesliga. One of the current key questions is; which team will be relegated. The two local teams (SV Darmstadt and Eintracht Frankfurt) are (hot) candidates. While I love the banter, let’s be data-driven and ... [Read more...]

Image Recognition and Face Detection

December 30, 2015 | Florian Teschner

Image recognition and face detection has been around for some years. However, usage and adoption was limited due to quality and ease of development. With the release of Microsoft’s Project Oxford, the accessibility to such tools has massively improved. Their simple to use REST API provides an excellent opportunity ... [Read more...]
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