Microeconomics · 免费预览
垄断从何而来
垄断者是某种没有近似替代品的商品的唯一卖者，受到法律、自然条件、资源或网络壁垒的保护，并且它面对的是整个向下倾斜的市场需求曲线。
1. The single seller
The single seller
2. Barriers, the moat
Barriers, the moat
3. Measuring monopoly power
Measuring monopoly power
4. The question the module asks
The question the module asks
5. The definition bites
Which of the following firms is closest to a true monopolist?
6. Natural monopoly
A water utility's costs are dominated by laying pipes, and serving the whole city costs 40 percent less per household than serving half of it. What kind of monopoly is this and why?
7. Pricing power from the demand curve
A monopolist faces demand P = 60 - Q/2, so that selling 40 units requires a price of 40 dollars. Compute the price needed to sell 60 units, and write the number.
8. The odd one out
Which of the following is LEAST like a barrier to entry?
9. The network moat
A messaging app becomes more valuable to each user as more friends join, and it already holds most of the market. What does this feature do?
10. The duplicated pipes
Serving a whole city with one water network costs 150 million dollars, while two overlapping half-networks would cost 100 million each. Compute the saving from the single network in millions, and write the number.