Web scrapping as a citizen's tool for transparency
Here you can find a web scraper of the portal de contratación de la Comunidad de Madrid and here a dataset with data of more than 1 million contracts of the Comunidad de Madrid. The data were used by eldiario.es and El Confidencial for the following articles on public procurement in the Madrid Region:
The Community of Madrid spent 20 times more on minor contracts than the City Council in 2017
How the Community of Madrid abuses micro-contracts by hand: 1 million in two years
Why you need a robot to know the hand-picked contracts of the Community of Madrid