Google
Saturday 
June 27, 2026 

AmosWEB means Economics with a Touch of Whimsy!

AmosWEBWEB*pediaGLOSS*aramaECON*worldCLASS*portalQUIZ*tasticPED GuideXtra CrediteTutorA*PLS
ENTRY BARRIERS: Institutional, government, technological, or economic restrictions on the entry of firms into a market or industry. The four primary barriers to entry are: resource ownership, patents and copyrights, government restrictions, and start-up costs. Barriers to entry are a key reason for market control and the inefficiency that this generates. In particular, monopoly, oligopoly, monopsony, and oligopsony often owe their market control to assorted barriers to entry. By way of contrast, perfect competition, monopolistic competition, and monopsonistic competition have few if any barriers to entry and thus little or no market control.

Visit the GLOSS*arama

Most Viewed (Number) Visit the WEB*pedia

MARGINAL REVENUE

The change in total revenue resulting from a change in the quantity of output sold. Marginal revenue indicates how much extra revenue a firm receives for selling an extra unit of output. It is found by dividing the change in total revenue by the change in the quantity of output. Marginal revenue is the slope of the total revenue curve and is one of two revenue concepts derived from total revenue. The other is average revenue. To maximize profit, a firm equates marginal revenue and marginal cost.

Complete Entry | Visit the WEB*pedia


APLS

WHITE GULLIBON
[What's This?]

Today, you are likely to spend a great deal of time at a going out of business sale trying to buy either a key chain with a built-in flashlight and panic button or a green and yellow striped sweater vest. Be on the lookout for slightly overweight pizza delivery guys.
Your Complete Scope

This isn't me! What am I?

Ragnar Frisch and Jan Tinbergen were the 1st Nobel Prize winners in Economics in 1969.
"It is very rare that you meet with obstacles in this world (that) the humblest man has not the faculties to surmount. "

-- Henry David Thoreau, philosopher

AVT
Ad Valorem Taxes
A PEDestrian's Guide
Xtra Credit
Tell us what you think about AmosWEB. Like what you see? Have suggestions for improvements? Let us know. Click the User Feedback link.

User Feedback



| AmosWEB | WEB*pedia | GLOSS*arama | ECON*world | CLASS*portal | QUIZ*tastic | PED Guide | Xtra Credit | eTutor | A*PLS |
| About Us | Terms of Use | Privacy Statement |

Thanks for visiting AmosWEB
Copyright ©2000-2026 AmosWEB*LLC
Send comments or questions to: WebMaster