Abstract
This paper has two objectives: to locate the global trade pattern and to compute the export potential of world economies. Considering the maximum number of countries and maintaining a good representative sample of the overall international trade, an empirical examination is conducted by utilizing the trade complementary index and the per-capita income variable in the standard gravity model. The main aim is to determine which of the two theoretical frameworks―either the Heckscher-Ohlin theory, which is based on factor endowments or the Modern Trade theory of Krugman-Helpman and Linder, based on the intra-industry trade―is explaining the overall global trade flows. The estimated results support the factor endowments trade theory. In other words, the observed trade patterns conform to the Heckscher-Ohlin theory of trade over intra-industry Modern trade theories. The inference drawn is based on the significantly positive coefficient of the trade complementarity index and the absolute differenced PCI variable. Furthermore, as far as export potential is concerned, there exists a vast scope for the export potential across economies. These countries can exploit the existing export potential through trade cooperation and integration at the regional and the bilateral level.
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Notes
Drysdale (1967) has examined the nature of trade patterns and concluded that two components explain two-country trades under complementarity nature: (1) factor endowment differences; and (2) biasness, which comprises geographical, social, linguistic, or any other policy. Therefore, his proposed complementarity index value can be incorporated under the gravity model to measure factor endowment.
Lineman’s (1966) model, although based on the quasi-Walrasian general equilibrium model, failed to incorporate prices in the final reduced form gravity model. Leamer and Stern (1970) doubted that this theoretical model even fails to explain the multiplicative functional form of the gravity model.
On the demand side, every individual is willing to have some of each commodity produced across the geographic regions which explain consumers’ homothetic preferences. On the supply side, every country produces varieties of commodities with different characteristics because of their place of origin. Hence, based on these two important assumptions the gravity model of trade is theoretically derived.
The term friction is defined as factors that cause resistance in the flow of goods between partners, sourced from human-made interventionist policies (tariff and non-tariff barriers) and natural barriers (Language, Culture, Religion, Border, Landlocked, etc.), including physical geographical distance.
Dixit-Stiglitz monopolistic competition assumes that a large number of competitors – touching infinity- exist in the market. This, in turn, leaves equilibrium pricing independent of the type of market structure. As the number of competitors increases, so the number of varied commodities available for consumption increases. Furthermore, the consumers ‘love of variety’ helps them raise their utility through the consumption of differentiated varieties of goods. This is technically known as Dixit-Stiglitz preference.
Linder Hypothesis states that countries with similar per-capita income consume similar quality products that push them to trade more.
The homoscedasticity assumption of the OLS technique means that the variances of error terms (equation) are constant. However, this is unlikely to occur in trade data. Therefore, a nonlinear technique of Poisson Pseudo Maximum Likelihood (PPML) estimator is employed for gravity estimations. It works well in the presence of heteroscedasticity and naturally takes care of zero value of export or import flows. It does not require fulfilling stringent OLS assumptions.
One should incorporate as many countries as possible so that the sample size becomes large enough. This can help in measuring the actual cross-country effects in the final results. Time should be taken periodically (i.e., at three years or five years interval) so that adjustment of change can be allowed for. Values should be in nominal terms. Fixed effect (paired fixed effect, exporter-importer time fixed effect) should be used for controlling multilateral trade resistance (MTR). Instead of cross-sectional data, panel data should be used as it increases degrees of freedom. Estimation techniques should be Nonlinear (PPML is recommended). In the case of panel data, covariates should be as less in number as possible (utilize the features of panel data techniques). Take care of the issue of zero trade values scientifically (deleting/truncating zero trade observations or adding a small value (censoring) at the places of zero trade flows or even averaging surrounding trade observations must be avoided).
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Acknowledgements
The authors are highly thankful to the two anonymous reviewers and the Journal of Quantitative Economics Editor for their valuable comments in improving this research work. The authors also express their gratitude towards the participants of the 7th International Conference on Empirical Issues in International Trade & Finance (EIITF) hosted by the Indian Institute of Foreign Trade, Kolkata, for their suggestions related to the earlier draft of this paper. Special thanks to Prof. Ranajoy Bhattacharya for his comments and suggestions on the methodology adopted in the article. The views expressed are those of the authors and not of the institution(s) they work for. The usual disclaimers apply.
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Kunroo, M.H., Ahmad, I. Heckscher-Ohlin Theory or the Modern Trade Theory: How the Overall Trade Characterizes at the Global Level?. J. Quant. Econ. 21, 151–174 (2023). https://doi.org/10.1007/s40953-022-00330-x
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DOI: https://doi.org/10.1007/s40953-022-00330-x
Keywords
- Trade pattern
- Intra-industry trade
- Gravity model
- Trade complementarity index
- Heckscher-Ohlin theory
- Krugman-Helpman theory
- Linder hypothesis
- Export potential