CONTEXT Levels of modern contraceptive knowledge and use among people living in rural areas of Guatemala differ substantially from those of people living in urban areas. Understanding the pace and extent of rural-to-urban migrants' adoption of urban contraceptive practices is important in determining if there is a strong need for migrant-focused reproductive health programs. METHODS Bivariate...

When did the modern human appear? Was it sudden or gradual? These are getting the most important theme not only in Archaeology, but in the evolution of human mind. The important thing in judging when humans evolved into modern humans is when humans obtained the modern human mind. However, thus far, the evolution of the modern human mind has been discussed mainly from archaeological, anthropolog...

What are they? Octopuses and their relatives, the cuttlefish and squids, form the class of modern cephalopods (coleoids). These are soft-bodied molluscan invertebrates like garden snails or sea hares (Aplysia). The modern cephalopods appeared in the sea at the same time as bony fish; more than 200 million years ago. The old cephalopods are virtually extinct — their only living representative is...

of the Dissertation Three Essays on Asset Pricing, Portfolio Choice and Behavioral Finance.

This paper analyzes the investment decisions of insured banks under fixed-rate deposit insurance. The model takes into account the charter value and allows banks to dynamically revise their asset portfolios. Trade-offs exist between preserving the charter and exploiting deposit insurance. The optimal bank portfolio problem is solved analytically for a constant charter value. In any audit period...

This paper, adopting the recursive multiple-priors utility, studies the optimal consumption and portfolio choice in a Merton-style model with anticipation when there is a difference between ambiguity and risk. The fundamental issue is what the effects of ambiguity and anticipation on the investor’s behavior are. In the case of a logarithmic felicity function, the paper also shows that no hedgin...

Let MPT (v, 2) denote a maximum packing of triples of order v and index 2. An MPT (v, 2) is called simple if it contains no repeated triples. It is proved in this paper that for v > 2 and any even 2, the necessary and sufficient condition for the embedding of a simple MPT(v,2) in a simple MPT(u,).) is u >/2v + 1.