☆ Author contributions: Khan FA designed, implement and manuscript preparation of the case report. Poong interpretation of the data and manuscript writing. Burat and interpretation of the data. All authors read and appro ☆☆ Conflict-of-interest statement: Fawad A. Khan, Mug Buratto declare that they have no conflicts of interest. ⁎ Corresponding author at: The International Center fo Neuroscien...

Empirical studies of international trade have concentrated on singleequation models to analyse the demand relationship for imports and exports [Houthakker and Magee (1969). Naqvi et al (1983), Bnhmani-Oskooee (1984,1986)]. These studies have assumed that the imports and exports price elasticities facing any individual country are infinite or at least large. The assumption of infinite supply pri...