I like analysis of data even in my free time. Sometimes it brings me some money, sometimes I do it just for fun. Below I describe several examples:

Taxi price analysis
Introduction I’ve always been fascinated by how data can reveal hidden patterns in everyday life. Like many urban dwellers, I often take taxis to save time—working on my laptop in the back seat instead of zoning out on public transport. But I couldn’t help noticing how wildly the prices fluctuated throughout the day! For my daily commuting needs, I regularly use Yandex.Taxi (internationally known as Yango), one of the largest ride-hailing services in Eastern Europe....