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    ABSTRACT: One of the strongest trends of the current globalization process is the development of intra-industry trade, which takes place outside the conventional theoretical framework. This paper focuses on this phenomenon in the particular case of Mexico, in the context of the North American Free Trade Agreement (nafta), where the production structure of its members has changed significantly with the trade openness according to the specific features of each country. The case of Mexico shows that the importance of foreign trade represents about two-thirds of the product (twice the 1990 size share), changing significantly the composition of exports. In this context, phenomena as intra-industry and intra-firm trade emerge, revealing the internationalization of production chains. However, China has become a major player in World trade and the region of North America has not been an exception. In fact, China has strongly irrupted in the nafta area, increasing its share as a supplier of goods despite not having signed agreements with these countries. This work aims at analysing the direction and depth of these trends and their impact on the intra-industry integration of Mexico.
    02/2014; 11(31):84-113. DOI:10.1016/S1665-952X(14)70446-3
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    ABSTRACT: In this work, we study whether aqueous extracts from the roots of Mimosa albida Humb. & Bonpl. ex Willd, a plant known in the Highlands of Chiapas, Mexico as "Lot´om ch´ix are endowed with both antinociceptive and anxiolytic effects. ICR mice were systemically treated with aqueous extracts from Mimosa albida and the reference compounds (diazepam, dipyrone and/or fentanyl) and their behavior was evaluated in several behavioral tests. Administration of aqueous extracts from the roots of Mimosa albida resulted in a reduction of the nociception elicited in mice by both the hot plate (12.5, 25 and 50mg/kg; i.p.) and the acetic acid-induced writhing (25 and 50mg/kg; i.p.) tests. No effects were however observed both in the elevated plus-maze and hole board test (3.2, 12.5 and 25mg/kg; i.p.). In contrast, both locomotion (open field test) and motor coordination (rotarod test) were affected at doses (50, 100 y 200mg/kg; i.p) higher than those having antinociceptive effects. These data suggest that in mice the systemic administration of low doses of aqueous extracts from the roots of Mimosa albida results in antinociceptive effects in several models of pain through mechanisms that not involve the opioid system pathway. These results support the ethnopharmacological use of Mimosa albida in popular medicine.
    Journal of ethnopharmacology 07/2013; 149(2). DOI:10.1016/j.jep.2013.07.010
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    ABSTRACT: The aim of this study is to analyze the factors determining loyalty towards online tourist services supplier with a model which integrates the influence of trust in tourism websites with the conceptual framework of the Theory of Planned Behaviour (TPB). The hypotheses were tested on a sample of 305 airline travel tickets online purchasers, with the use of structural equation models. The results of the empirical study suggest that the three variables of TPB (perceived control, subjective norm and attitude) positively influence loyalty towards Internet use to purchase airline tickets. The role of trust is especially relevant as it also boosts the effect of TPB variables. Finally, a set of managerial implications are considered.
    06/2013; 58(2):279-302. DOI:10.1016/S0186-1042(13)71218-X


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