Background and study aims  In an optical diagnosis strategy, diminutive polyps that are endoscopically characterized with high confidence are removed without histopathological analysis and distal hyperplastic polyps are left in situ. We evaluated the effectiveness and costs of optical diagnosis. Methods  Using the Adenoma and Serrated pathway to Colorectal CAncer (ASCCA) model, we simulated b...

China saves an extraordinary share of its GDP; moreover, this share has been growing steadily over the last two decades. More puzzling, however, is the persistence of this savings behavior in the face of the high rate of growth of the economy – a rate that shows no sign of abating. A standard neoclassical model would not predict such a relationship between the two variables, and would in fact p...

The choice of how much of society’s income to consume today and how much to save for future consumption is among the most important economic decisions. It can have implications not only for the well-being of the households taking the decisions, but also for the rate at which the economy invests and grows, and therefore the well-being of future generations. The way in which savings decisions are...