log-lin和log-log之间转变和回归分析 Log-level and Log-log transformations in Linear Regression Models
A particular attention is given to the 'elasticity of conditional mean (i.e., regression function)', which is what most researchers have in mind when they use log-linear models, and we provide practical ways to find it in the presence of heteroskedasticity. We...
The energy input factors,except labor and capital,were classified into the inputs of coal,petroleum,natural gas,and electric power.A trans-log production function model was established,and the parameters of the model were estimated by ridge regression.From the model,the output elasticity,substitution...
A novel non-destructive method has been developed to predict modulus of elasticity (MOE) of logs using measurements taken from cores extracted from discs. The trees were felled and cut into logs to allow validation of our method; however, similar results
With the lin-log approach, all data from different experiments can be combined to give realistic elasticity and flux control coefficient estimates by linear regression. Despite the large changes, a good agreement of fluxes and metabolite concentrations is obtained between the measured and calculated ...
Hence, a linear regression does not corroborate a Power Law because Lognormal, exponential (see [5]) and other distributions can manifest themselves as linear in a rank/size log–log plot. The following equation, Equation (2) of Hoon et al. [25], further describes this relation: xrβ=A...
I.e. leave the regression as is. Under some assumptions about what is driving x to be zero and lnx to be undefined, for example that x is below some threshold such as 0.5 and is censored, perhaps due to privacy concerns, then leaving out those cases is selection on observable x and ...
In writing this post, have looked in vain (albeitveryquickly) to see if anyone had written anything about what to do with the coefficient on an IHS-transformed variable to recover an elasticity, but could not find anything directly about this. If you know of such an article or resource, ...
Estimating the modulus of elasticity, tensile strength, and modulus of rupture of self compacting concrete [O] . Vilanova Fernández Angel, Fernandez Gomez Jaime Antonio, Agranati Landsberger Galit 2011 机译:使用当前估算模型评估自密实混凝土的机械性能。估算自密实混凝土的弹性模量,拉伸强度和断裂模量...
C. SantosSilvaandSilvanaTenreyro*Abstract —Althougheconomists havelongbeenawareof Jensen’s in‑equality,manyeconometric applications haveneglectedan importantimplicationof it: under heteroskedasticity, the parametersof log‑linearizedmodelsestimated by OLS leadtobiasedestimates of thetrueelasticities. We ...