I'm Griefberg and this is my blog. Its purpose is very simple: I want to learn something and then try to explain it as simple as I can. All topics will be connected with my interests: data science, analytics, economics, technologies, etc. I don't claim to be an expert in all these fields. I just want to have fun, systematize my knowledge and experience and share it with you. I hope you will find it interesting and useful as well.