It is very common to see reported in applied econometric literature time series regression equations with an apparently high degree of fit, as measured by the coefficient of multiple correlation R2 or the corrected coefficient R2, but with an extremely low value for the Durbin-Watson statistic. We find it very curious that whereas virtually every textbook on econometric methodology contains exp...

Nine additive allometric equations for computing above-ground, standing biomass were developed for the plant community and for each of 18 single species typical of the Tamaulipan thornscrub of north-eastern Mexico. Equations developed using additive procedures in seemingly unrelated linear regression provided statistical efficiency in total biomass estimates at the scales of both individual spe...

In this paper, the topological properties of a transportation infrastructure system consisting of the highways and bridges in Newcastle County, Delaware as well as the interactions between them when subjected to disturbance were assessed. The disturbance was implemented through two disruption strategies while the response was quantified using the interaction response. Limiting values correspond...

A SAS/IML software program is described that computes regression diagnostics for generalized estimating equations. These diagnostics are computationally efficient and accurate approximations for the effect of deleting one observation or one cluster on individual regression coefficients (DFBETA) or on the overall fit of the model (Cook’s Distance). New formulae for the diagnostics are presented ...

3.2 Likelihood equations and errors-in-variables regression; Solari's example.. Here is a case, noted by Solari (1969), where the likelihood equations (3.1.1) have solutions, none of which are maximum likelihood estimates. be observed points in the plane. Suppose we want to do a form of " errors in variables " regression, in other words to fit the data by a straight line, assuming normal errors...

BACKGROUND Ideal dental restoration is one which not only restores optimal functions but also confirm to standard dental and facial relations. This is important to achieve long term patient satisfaction both with regard to esthetics as well as functions. Objective was to find a credible relationship between dental and facial proportions using height of individuals as the criteria in a specific ...