(2007). The composition of the essential oils is usually studied by gas chromatography–mass spectrometry (GC-MS) (Ozel, Gogus, Hamilton, & Lewis, 2004). The major constituents identified in the PGH essential oil are α-pinene, α-terpinolene, limonene, and δ-3-carene (~80%), which ...
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Since Hamilton's pioneering study on the impact of changes in the OPR on the US business cycle (Hamilton1983), other studies have attempted to explore the influence of these changes on macroeconomic indices (Golub1983a,b; Krugman1983; Rogoff1991). At the same time, several others have looked...
ExxonMobil (NYSE:XOM) has been producing a little over 2.4 million barrels of oil a day for the last year and a half, its lowest rate of production over the last decade. The dark blue line in the figure below shows the company’s production each year since 1999. Four years ago,Stuart...
Let Δotdenote the monthly percent change in in oil prices (technically, the change in the natural logarithm) andztthe percentage gap in cost (technically,zt= ln(ot/6gt)). If you use a regression to try to predict oil prices from their own lagged values and the lagged oil-gas cost ga...
We are grateful to the editor Professor Carol Alexander and to the two anonymous referees for their very insightful comments and suggestions. We also like to thank Karim Chalak, James Hamilton, Lutz Kilian, Georg Strasser and Zhijie Xiao for helpful discussions.View...
by tracing sequential changes in FA ratios is a qualitative and surrogate method to explore any putative EPA and DHA biosynthesis87. The approach has limitations because ratios can change due to selective accumulation or catabolism of FAs too, besides their bioconversion. Therefore, we used FA ratio...
[6] Brown JH, Burnside WR, Davidson AD, DeLong JP, Dunn WC, Hamilton MJ, et al. Energetic Limits to Economic Growth. Bioscience. 2011 Jan;61(1):19-26. [7] Ayres RU, Warr B. Accounting for Growth: The Role of Physical Work. Structural Change and Economic Dynamics. [2004 Feb] Acce...
Some third parties are outside of the European Economic Area, with varying standards of data protection. See our privacy policy for more information on the use of your personal data. Manage preferences for further information and to change your choices. Accept all cookies ...
Some third parties are outside of the European Economic Area, with varying standards of data protection. See our privacy policy for more information on the use of your personal data. Manage preferences for further information and to change your choices. Accept all cookies ...