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Chapter 14

Externalities and Public Goods

外部
外部
Externalities are outcomes of economic activities that affect third parties who are not directly involved in it. These impacts can be either positive or ...
プライベートコストとメリット
プライベートコストとメリット
Private cost is the expenses a business incurs while producing a good or the price paid by an individual in purchasing a good. For example, consider a ...
社会的コストと利益
社会的コストと利益
Private costs and benefits are the financial impacts on individuals or businesses directly involved in a transaction. However, when an additional unit of ...
負の外部性
負の外部性
A negative externality is a cost suffered by an unrelated third party due to an economic transaction. The costs created by negative externalities are not ...
正の外部性
正の外部性
Positive externalities occur when a third party benefits from an economic transaction without being directly involved. Take vaccines as an example. When ...
効率的な汚染レベル
効率的な汚染レベル
Producing goods often results in pollution as a byproduct, but eliminating all pollution isn't practical. Doing so would mean halting the production ...
価格メカニズム:税金
価格メカニズム:税金
Price-modification policies can correct externalities. One such policy is Pigovian taxes, named after economist Arthur Pigou. Pigovian taxes are designed ...
価格メカニズム:補助金
価格メカニズム:補助金
In situations where positive externalities exist, governments often employ Pigouvian subsidies to adjust market prices. Pigouvian subsidies are financial ...
数量メカニズム: クォータ
数量メカニズム: クォータ
Quantity-based interventions aim to address externalities by directly controlling the amount of a good or activity. Quotas are a prime example of this ...
価格と数量ベースの介入
価格と数量ベースの介入
Pollution can be reduced using two main strategies: a quota on emissions or a tax on emissions. But which one is better? Take the steel industry. A quota ...
取引可能な許可証市場
取引可能な許可証市場
Governments frequently struggle to accurately estimate each firm's pollution reduction costs and set appropriate quotas or taxes. Tradable permits ...
リサイクルの効率的な量 I
リサイクルの効率的な量 I
In an imaginary town, Greendale, residents carelessly dispose of recyclable plastics due to minimal additional trash pickup fees, leading to recyclable ...
リサイクルの効率的量II
リサイクルの効率的量II
In the town of Greendale, tackling the recyclable plastic waste issue with price or quantity mechanisms, such as a disposal fee, quota, or disposable ...
コースの定理
コースの定理
The Coase Theorem states that costless negotiation among market participants will lead to an efficient market outcome regardless of who holds legal ...
私財と共有資源
私財と共有資源
Private goods are items that a person can buy and use, which then prevents others from using them. For example, a slice of pizza. It is a private good ...
クラブグッズ&パブリックグッズ
クラブグッズ&パブリックグッズ
Club goods are products that are excludable but non-rivalrous. This means that access to these goods can be restricted to certain people, but one ...
重要な公共財
重要な公共財
Public goods are mainly provided by the government because they benefit everyone and cannot be limited only to those who pay for them. Private companies ...
公共財の最適水準
公共財の最適水準
In finding the optimal level of public goods, consider national defense as an example. Suppose a nation has two individuals, John and Jane. The graph ...
フリーライダー問題
フリーライダー問題
The free rider problem occurs when some people benefit from resources or services without paying for them. This issue arises because public goods are ...
コモンズの悲劇
コモンズの悲劇
The tragedy of the commons happens when individuals use a shared resource selfishly, harming everyone's interest, including their own. Consider a ...
財産権
財産権
Property rights refer to the legal control individuals or entities have over resources. It includes the right to use, sell, or lease these resources. When ...
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