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An economic variable can be exogenous in some models and endogenous in others. In particular this can happen when one model also serves as a component of a broader model.
An exogenous contrast agent, in medical imaging for example, is a liquid injected into the patient intravenously that enhances visibility of a pathology, such as a tumor.An exogenous factor is any material that is present and active in an individual organism or living cell but that originated outside that organism, as opposed to an endogenous factor.
Pressures can also be sub-categorized as endogenic managed pressures, when they stem from within the system and can be controlled (e.g.: land claim, power generation), and as exogenic unmanaged pressures, when they stem from outside the system and cannot be controlled (e.g.: climate change, geomorphic activities). [9]
Endogeny, in biology, refers to the property of originating or developing from within an organism, tissue, or cell. [1]For example, endogenous substances, and endogenous processes are those that originate within a living system (e.g. an organism or a cell).
The endogeneity problem is particularly relevant in the context of time series analysis of causal processes. It is common for some factors within a causal system to be dependent for their value in period t on the values of other factors in the causal system in period t − 1.
Endogenic phenomena. Plate tectonics. Continental drift; Earthquake; Oceanic trench; Phenomena associated with igneous activity. Geysers and hot springs; Bradyseism; Volcanic eruption; Earth's magnetic field; Exogenic phenomena. Slope phenomena Slump; Landslide; Weathering phenomena Erosion; Glacial and peri-glacial phenomena Glaciation ...
English: Cartoon illustrating major fluxes of carbon to, from, and within the Earth’s exogenic and endogenic systems. The fluxes discussed in this paper are highlighted as large colored arrows; the small arrows represent other processes occurring within each system that are not considered in this study.
Charles Lyell proposed marine planation, oceans, and ancient shallow seas were the primary driving force behind denudation. While surprising given the centuries of observation of fluvial and pluvial erosion, this is more understandable given early geomorphology was largely developed in Britain, where the effects of coastal erosion are more ...