Due to scarcity of resources, a decision is made to use the resources in infinite possibilities. For example, if $4 can buy a cup of coffee or two ice cream cones, if you buy one cup of coffee, the opportunity cost will be two ice cream cones. Opportunity costs are “the highly valuable alternatives that must be given up when the decision is made to use resources in a certain option.”

To establish the complete opportunity cost, positive and negative external factors (externalities) are taken into account.

When individuals group together in societies, they face different types of dilemmas. The classic one is the dilemma between "cannons and butter." The more we spend on national defense to protect our coasts from foreign aggressors (cannons), the less we can spend on personal goods to improve the standard of living at home (butter). In modern society, the trade-off between a clean environment and a high level of profitability is also important. Legislation that forces companies to reduce pollution raises the cost of producing goods and services. As costs are higher, they end up making fewer profits, paying lower wages, charging higher prices, or all three at the same time.

The opportunity cost is associated with a famous controversy at the beginning of the last century, where the English economists who were disciples of Marshall opposed the continental economists of the Austrian School, at the head of which was Friedrich von Wieser with his Theory of Alternative or Opportunity Cost on the following points:

More arguments were put forward in the controversy, but the main concepts are those already presented. The most notable thing about the concept is that opportunity cost would only make sense if the opportunity was fixed or limited in reasoning. That is, if there is a conflict in carrying out multiple investments or actions, simultaneously or consecutively, that are not feasible without having to choose between all of them as alternatives.

The problem would lie in knowing if there are fixed things in an economy. For time or space "Space (physics)") available is true, but would it be enough? The most widespread opinion was that opportunity cost could not find application beyond limited resources. This led some economists to limit the subject of economics to situations of "exceptional" resources (still present in all economics textbooks). Since the consequences that could arise from an economic science that did not have limits set outside the economic system, in terms of availability of goods, are unknown.

Obtaining more of a good in equal quantities requires giving up greater quantities of the alternative good. This occurs because resources are not equally productive in different activities. Furthermore, its production boundary is concave with respect to the origin. Increasing opportunity costs arise because resources or factors of production (capital and labor):.

According to the law of comparative advantage, the nation with the lowest relative price has a comparative advantage in that commodity but a comparative disadvantage in the other, with respect to the second nation, therefore specialization must occur in the commodity with comparative advantage and exchange part of its production with the second nation for its commodity with comparative disadvantage. However, when the nation specializes in its commodity with comparative advantage, it will be incurring increasing costs, which will continue the specialization until the relative prices of the goods of the two nations are equal at the level at which trade is in equilibrium.

They are also called "Ricardian costs" and arise:

Therefore, there are constant costs because the same quantity of one commodity must be given up to produce an additional unit of a second commodity. Although opportunity costs are constant in each nation, if they vary between two nations they allow the exchange of products (trade). Constant costs are said to be unrealistic, since their production possibilities frontier is represented in a straight line. Furthermore, since it is in the absence of trade, the nation only consumes the goods it produces, which represents an equity between its production possibilities frontier and its consumption frontier.

Due to scarcity of resources, a decision is made to use the resources in infinite possibilities. For example, if $4 can buy a cup of coffee or two ice cream cones, if you buy one cup of coffee, the opportunity cost will be two ice cream cones. Opportunity costs are “the highly valuable alternatives that must be given up when the decision is made to use resources in a certain option.”

To establish the complete opportunity cost, positive and negative external factors (externalities) are taken into account.

When individuals group together in societies, they face different types of dilemmas. The classic one is the dilemma between "cannons and butter." The more we spend on national defense to protect our coasts from foreign aggressors (cannons), the less we can spend on personal goods to improve the standard of living at home (butter). In modern society, the trade-off between a clean environment and a high level of profitability is also important. Legislation that forces companies to reduce pollution raises the cost of producing goods and services. As costs are higher, they end up making fewer profits, paying lower wages, charging higher prices, or all three at the same time.

The opportunity cost is associated with a famous controversy at the beginning of the last century, where the English economists who were disciples of Marshall opposed the continental economists of the Austrian School, at the head of which was Friedrich von Wieser with his Theory of Alternative or Opportunity Cost on the following points:

More arguments were put forward in the controversy, but the main concepts are those already presented. The most notable thing about the concept is that opportunity cost would only make sense if the opportunity was fixed or limited in reasoning. That is, if there is a conflict in carrying out multiple investments or actions, simultaneously or consecutively, that are not feasible without having to choose between all of them as alternatives.

The problem would lie in knowing if there are fixed things in an economy. For time or space "Space (physics)") available is true, but would it be enough? The most widespread opinion was that opportunity cost could not find application beyond limited resources. This led some economists to limit the subject of economics to situations of "exceptional" resources (still present in all economics textbooks). Since the consequences that could arise from an economic science that did not have limits set outside the economic system, in terms of availability of goods, are unknown.

Obtaining more of a good in equal quantities requires giving up greater quantities of the alternative good. This occurs because resources are not equally productive in different activities. Furthermore, its production boundary is concave with respect to the origin. Increasing opportunity costs arise because resources or factors of production (capital and labor):.

According to the law of comparative advantage, the nation with the lowest relative price has a comparative advantage in that commodity but a comparative disadvantage in the other, with respect to the second nation, therefore specialization must occur in the commodity with comparative advantage and exchange part of its production with the second nation for its commodity with comparative disadvantage. However, when the nation specializes in its commodity with comparative advantage, it will be incurring increasing costs, which will continue the specialization until the relative prices of the goods of the two nations are equal at the level at which trade is in equilibrium.

They are also called "Ricardian costs" and arise:

Therefore, there are constant costs because the same quantity of one commodity must be given up to produce an additional unit of a second commodity. Although opportunity costs are constant in each nation, if they vary between two nations they allow the exchange of products (trade). Constant costs are said to be unrealistic, since their production possibilities frontier is represented in a straight line. Furthermore, since it is in the absence of trade, the nation only consumes the goods it produces, which represents an equity between its production possibilities frontier and its consumption frontier.