Laffer curve A draft paper by Y. Hsing looking at the United States economy between 1959 and 1991 placed the revenue-maximizing average federal tax rate between 32.67% and 35.21%. A 1981 article published in the "Journal of Political Economy" presented a model integrating empirical data that indicated that the point of maximum tax revenue in Sweden in the 1970s would have been 70%. A 2011 paper by Trabandt and Uhlig published in the "Journal of Monetary Economics" estimated a 70% revenue maximizing rate, and predicted that the US and most European economies were on the left of the Laffer curve (in other
Keeling Curve Keeling Curve The Keeling Curve is a graph of the accumulation of carbon dioxide in the Earth's atmosphere based on continuous measurements taken at the Mauna Loa Observatory on the island of Hawaii from 1958 to the present day. The curve is named for the scientist Charles David Keeling, who started the monitoring program and supervised it until his death in 2005. Keeling's measurements showed the first significant evidence of rapidly increasing carbon dioxide levels in the atmosphere. According to Dr Naomi Oreskes, Professor of History of Science at Harvard University, the Keeling curve is one of the most important