Statistics about the demand and supply of skill

Question: How does the skill demand of companies match the skill supply of IT-experts?

Below you will find links to statistics that show the market in its whole, that is from the perspective of supply and demand. That enables you to figure out areas of oversupply or excess-demand that normally would affect price levels in correctly working markets, e.g., hourly wage rates and salaries usually change.

Operating Systems
Compares the supply and demand of skills in the area of operating systems in the last year. The supply of skills is computed from the IT expert's CVs.
Database Systems
Comparison of the demand of skills (from job ads in the last year) and the supply of skills in the area of data base systems.
Programming Languages
Informs about the market of programming languages by comparing the demand of programming languages in the job and project offers of the last year to the supply.
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