The estimated coefficient associated with a linear time trend variable is interpreted as a measure of the impact of a number of unknown or known but unmeasurable factors on the dependent variable over one unit of time.
2.
(iii ) The inclusion of a linear time trend in a model precludes by assumption the presence of fluctuations in the tendencies of the dependent variable over time; is this necessarily valid in a particular context?
3.
For example, detailed notes on the meaning of linear time trends in regression model are given in Cameron ( 2005 ); Granger, Engle and many other econometricians have written on stationarity, unit root testing, co-integration and related issues ( a summary of some of the works in this area can be found in an information paper by the Royal Swedish Academy of Sciences ( 2003 ); and Ho-Trieu & Tucker ( 1990 ) have written on logarithmic time trends with results indicating linear time trends are special cases of cycles
4.
For example, detailed notes on the meaning of linear time trends in regression model are given in Cameron ( 2005 ); Granger, Engle and many other econometricians have written on stationarity, unit root testing, co-integration and related issues ( a summary of some of the works in this area can be found in an information paper by the Royal Swedish Academy of Sciences ( 2003 ); and Ho-Trieu & Tucker ( 1990 ) have written on logarithmic time trends with results indicating linear time trends are special cases of cycles
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