Classification and examples

Michael Porter classifies the markets into four accepted cases:

Aerial barrier to access and aerial avenue barrier (for example, telecommunications, energy)

Aerial barrier to access and low avenue barrier (for example, consulting, education)

Low barrier to access and aerial avenue barrier (for example, hotels, ironworks)

Low barrier to access and low avenue barrier (for example, retail, cyberbanking commerce)

Markets with aerial access barriers accept few players and appropriately aerial accumulation margins.

Markets with low access barriers accept lots of players and appropriately low accumulation margins.

Markets with aerial avenue barriers are ambiguous and not self-regulated, so the accumulation margins alter actual abundant over time.

Markets with a low avenue barrier are abiding and self-regulated, so the accumulation margins do not alter abundant over time.

The college the barriers to access and exit, the added decumbent a bazaar tends to be a accustomed monopoly. The about-face is additionally true. The lower the barriers, the added acceptable the bazaar will become absolute competition.