Adena culture Spoons, beads and other implements were made from the marine conch. A few copper axes have been found, but otherwise the metal was hammered into ornamental forms, such as bracelets, rings, beads, and reel-shaped pendants. Adena culture The Adena culture was a Pre-Columbian Native American culture that existed from 1000 to 200 BC, in a time known as the Early Woodland period. The Adena culture refers to what were probably a number of related Native American societies sharing a burial complex and ceremonial system. The Adena lived in an area including parts of present-day Ohio, Indiana, Wisconsin, West Virginia, Kentucky,
Karl Shell the overlapping generations literature (and was perhaps the first to refer to the overlapping generations model by its modern name). The overlapping generations model is now a workhorse in modern macroeconomics and monetary economics. Karl Shell is also co-inventor (with David Cass) of the concept of sunspot equilibrium (and sunspots). Karl Shell Karl Shell (born May 10, 1938) is an American theoretical economist, specializing in macroeconomics and monetary economics. Shell received an A.B. in mathematics from Princeton University in 1960. He earned his Ph.D. in economics in 1965 at Stanford University, where he studied under Nobel Prize in Economics winner