Abstract Background Although rare, spontaneous splenic rupture (SSR) is a potentially life threatening condition and most commonly associated with infection malignancy. Haematological malignancies are an important differential diagnosis among these chronic myeloid leukaemia (CML) has one of the highest associations SSR. Methods This case report follows previously fit healthy thirty-three year o...

This papers analyses the causes behind Africa’s unfortunate transformation into the source of the world’s slaves over the early modern period. We discuss the economic and technological forces leading to it, and address questions such as why were most slave buyers Europeans and most slave sellers Africans. We then relate the discussion to the long-term determinants of African underdevelopment, a...

Can directed technical change be used to combat climate change? We construct new firm-level panel data on auto industry innovation distinguishing between “dirty” (internal combustion engine) and “clean” (e.g. electric and hybrid) patents across 80 countries over several decades. We show that firms tend to innovate relatively more in clean technologies when they face higher tax-inclusive fuel pr...

This paper reports on my replication of the 1997 Sachs and Warner resource curse working paper. Exact pure replication is achieved. A test for statistical replication shows that some of the Sachs and Warner results attempting to determine the cause of the resource curse are not robust to the country sample. A test for scientific replication shows that findings of the resource curse are not sens...

We estimate the development effects of electrification across Brazil over the period 1960–2000. We simulate a time series of hypothetical electricity grids for Brazil for the period 1960–2000 that show how the grid would have evolved had infrastructure investments been made based solely on geography-based cost considerations. Using the model as an instrument, we document large positive effects ...

The analysis of land investment and tenure security usually assumes land scarcity. However, some developing countries have communities with land abundance. This article therefore examines the effects of land abundance for investment and tenure security. The paper develops a formal test of land abundance and estimates a system of three simultaneous equations. The empirical analysis uncovers sign...

In this note we study the distortions in an endogenous growth model developed by Grimaud and Tournemaine (2007), where new pieces of knowledge are produced in a R&D sector and used to reduce pollution emissions. Using this model along with a realistic calibration, we conclude that the economy strongly underinvests in R&D, such that the policy maker would need to implement a strong tax-subsidy s...

بخش‌بندی تأمین‌کنندگان، پایه و اساس تصمیمات مدیران زنجیره تأمین با هدف مدیریت توسعه تأمین‌کنندگان است. پژوهش حاضر ارائه رویکردی پویا برای طراحی استراتژی در این به‌دلیل اینکه علاوه بر ویژگی‌های اقلام خرید استراتژی‌ها نقش مهمی دارد، از دومرحله‌ای استفاده شده مرحله نخست، معیارهای مناسب رویکرد پرتفولیو طبقه‌بندی می‌شوند؛ سپس دوم، هر طبقه دو بُعد توانمندی تمایل متناسب بعُد می‌شوند. درنهایت بخش استراتژ...