Lewis revisited : tropical polities competing on the world market 1830-1938

Since the seminal work by W.A. Lewis, exports of primary products have been deemed the main or sole source of growth in tropical countries before the Great Depression. This conventional wisdom, however, relies on very limited evidence. This paper analyses the growth of exports with a constant market share analysis for 84 tropical polities. Exports grew a lot, but less than total trade, while relative prices of tropical products remained roughly constant. We thus tentatively infer that the decline in the tropical shares on world trade reflects an insufficient demand for tropical products. Asia mastered well these headwinds throughout the whole period, while African polities blossomed after World War One. The loser was (South) America, and most notably the Caribbean former slave colonies especially before 1870

Are we using Thyroid Function Tests Appropriately?

Thyroid function tests are very important for the diagnosis and monitoring of patients with thyroid dysfunction. The guidelines recommend serum thyroid stimulating hormone (TSH) as the single most reliable test to diagnose all common forms of hypothyroidism and hyperthyroidism. The aim of this study was to analyze the ordering pattern for thyroid function tests by physicians and the analysis of results based on the clinical history. The mean age of the patients was 32.5 ± 6.5 years. Majority of samples (87.7% of total) were received from the departments of Medicine and Gynae. Thyroid profiles (47.5%) were ordered more frequently as compared to TSH only (46%). There was no significant difference in the percentage of normal reports for both types of tests. 77.8% of TFT and 76.6% of TSH samples had results within the reference range. The percentage of abnormal results was 13.7% in the patients who were screened for thyroid disorders. There is a need to redefine the case definition for thyroid dysfunction and order the appropriate test in a rational and cost effective manner