| 1957 | 1960s | 1970s | 1980s | 1990s | 2000+ | |
| Restrictive practices | 0 | 1 | 2 | 3 | 4 | 4 |
| Abusive Monopolies | 0 | 1 | 2 | 2 | 3 | 3 |
| Mergers | 0 | 0 | 0 | 0 | 4 | 4 |
| Liberalized Utilities (telecoms, energy, postal services) | 0 | 1 | 1 | 2 | 4 | 4 |
| State Aids | 0 | 1 | 1 | 2 | 3 | 4 |
Scale Coding
0 = No EU Competence
1 = EU Competence but dormant
2 = EU Competence slowly developing
3 = EU Competence and active
4 = EU Competence and very active
*This table relates specifically to the competition policy provisions of the EEC Treaty and subsequent developments and deliberately excludes the competition provisions (Articles 65 and 66) under the (now defunct) ECSC Treaty in these more specific economic sectors. The coding reflects both institutional drive and activity and legislative and administrative changes to how each of the five areas were handled.