JEL Classification: J15, N31 Improving early prenatal and postnatal conditions account for at least 16 to 17 percent of the decline in ten year mortality rates of 60-79 year olds between 1900 and 1960-80. Historical trends in early prenatal and postnatal conditions imply that while the baby-boom cohort may be particularly long-lived compared to past cohorts, mortality rates may not fall as stee...

Relational concepts play a central role in human perception and cognition, but little is known about how they are acquired. For example, how do we come to understand that physical force is a higher-order multiplicative relation between mass and acceleration, or that two circles are the same-shape in the same way that two squares are? A recent model of relational learning, DORA (Discovery of Rel...

An ethnomedicinal survey was carried out among the ethnic group of Nuka Dora tribes inhabited in Paderu division, Alluri Sitarama Raju District, Andhra Pradesh during 2021-2022. A total 98 plant species belonging to 88 genera and 35 families. All plants need be evaluated through phytochemical investigations discover their potentiality as drugs. The study shows a high degree novelty use tribal p...

Quantification plays a central role in human reasoning and models thereof, but the discovery and development of quantification remains an open question. We present a theory of how such concepts are learned from experience in the DORA model, a neurally-plausible computational model of relational learning and reasoning (Doumas et al., 2008). The same theory accounts for how concepts of number are...