We show why these interaction term coefficients cannot be interpreted as a DIS or semielasticity in the same manner as continuous coefficients, which has been overlooked by some empirical researchers. Then we show how interaction terms can be easily transformed into a DIS and derive the asymptotic...
log-lin和log-log之间转变和回归分析 Log-level and Log-log transformations in Linear Regression Models
Logistic regression models (\(\hbox {lr}_1\) and \(\hbox {lr}_2\)) with two sets of explanatory variables were designed similar to the linear models in “A linear regression to describe the max. bow height” section. Unlike in Eqs. 5 and 6, the stand was not applied as a random...
We can write it in the form of a linear regression model: ln(f(x)) = β0 + β1 (x - x0) + ε where β0 = ln(f(x0)), β1 = f'(x0)/f(x0), and ε represents the error term. This log-linearized model can be used to estimate the elasticity of the function f(x) ...
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
Multilinear regression (MLR) analysis was utilised to build predictive models for the measured responses from input parameters. The modelling was performed with MODDE Pro-12 software (Umetrics Sartorius, Umeå, Sweden). 3. Results A total of 27 MBSM experiments were performed at 9 different setti...
(2015) find that China's disaggregated price and expenditure elasticities for log import are greater than one with regard to the main importer countries in absolute value, implying that the weighted-average elasticity in their studies should also be greater than one, while they are inelastic in ...
Using the arguments stated above, we set the values of these four (E1, E4, E9, E15) elasticities to zero, implemented the non-linear regression step, with the new sparser elasticity matrix, and estimated the elasticities using steady state and dynamic data. The results are presented in Fig...
To understand the effects of silvicultural treatments on tree and product modulus of elasticity (MOE), an intensive study along the stand-tree-product value chain was conducted. Acoustic tests were performed on 460 Douglas-fir (Pseudotsuga menziesii (Mir
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 ...