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Both models used the idea of comparative advantage and an explanation of why countries trade. However, many economists have made the point of claiming that these models provide no explanation towards intra-industry trade as under their assumptions countries with identical factor endowments would not trade and produce goods domestically. [2]
The Hierarchical Network Approach is used to measure economic interdependence by analysing growth clusters and cross-country liaison, and business cycle synchronisations. The cross-country liaison or economic interaction between countries or states is most commonly measured by Pearson's cross-correlation coefficient. [22]
International trade is the exchange of capital, goods, and services across international borders or territories [1] because there is a need or want of goods or services. [2] (See: World economy.) In most countries, such trade represents a significant share of gross domestic product (GDP).
New trade theory tries to explain empirical elements of trade that comparative advantage-based models above have difficulty with. These include the fact that most trade is between countries with similar factor endowment and productivity levels, and the large amount of multinational production (i.e., foreign direct investment) that exists
New trade theorists relaxed the assumption of constant returns to scale, and showed that increasing returns can drive trade flows between similar countries, without differences in productivity or factor endowments. With increasing returns to scale, countries that are identical still have an incentive to trade with each other.
Globalization is the process of increasing interdependence and integration among the economies, markets, societies, and cultures of different countries worldwide. This is made possible by the reduction of barriers to international trade, the liberalization of capital movements, the development of transportation, and the advancement of information and communication technologies. [1]
The gravity model of trade in international economics, similar to other gravity models in social science, predicts bilateral trade flows based on the economic sizes of (often using GDP measurements) and distance between two units. The basic theoretical model for trade between two countries takes the form of:
Examinations of the Linder hypothesis have observed a "Linder effect" consistent with the hypothesis.Econometric tests of the hypothesis usually proxy the demand structure in a country from its per capita income: It is convenient to assume that the closer are the income levels per consumer the closer are the consumer preferences. [2]